第一部分 php输入post过滤函数

function GLOBAL_POST($str)
{$str_origin=$str;
if (empty($str)) return false;$str = str_replace( '/', "", $str);//替换关键词
$str = str_replace("\\", "", $str);
$str = str_replace("&gt", "", $str);
$str = str_replace("&lt", "", $str);
$str = str_replace("<SCRIPT>", "", $str);
$str = str_replace("</SCRIPT>", "", $str);
$str = str_replace("<script>", "", $str);
$str = str_replace("</script>", "", $str);
$str=str_replace("select","select",$str);
$str=str_replace("join","join",$str);
$str=str_replace("union","union",$str);
$str=str_replace("where","where",$str);
$str=str_replace("insert","insert",$str);
$str=str_replace("delete","delete",$str);
$str=str_replace("update","update",$str);
$str=str_replace("like","like",$str);
$str=str_replace("drop","drop",$str);
$str=str_replace("create","create",$str);
$str=str_replace("modify","modify",$str);
$str=str_replace("rename","rename",$str);
$str=str_replace("alter","alter",$str);
$str=str_replace("cas","cast",$str);
$str=str_replace("&","&",$str);
$str=str_replace(">",">",$str);
$str=str_replace("<","<",$str);
$str=str_replace("&emsp;","",$str);
$str=str_replace(" ","",$str);
$str=str_replace("	","",$str);
$str=str_replace("&","",$str);
$str=str_replace("'","",$str);
$str=str_replace("<br />",chr(13),$str);
$str=str_replace("''","'",$str);
$str=str_replace("css","'",$str);
$str=str_replace("CSS","'",$str);
$str=str_replace(";","",$str);
$str=str_replace("-","",$str);
$str=str_replace("*","",$str);
$str=str_replace("!","",$str);
$str=str_replace("$","",$str);
$str=str_replace("=","",$str);
$str=str_replace("+","",$str);
$str=str_replace("%","",$str);$str = htmlspecialchars($str);//把预定义的字符 "<" （小于）和 ">" （大于）转换为 HTML 实体：
$str = strip_tags($str);//strip_tags() 函数剥去字符串中的 HTML、XML 以及 PHP 的标签。if($str_origin==$str){return $str;}else{
return false;}
}

这个函数过滤了大部分值（您可错杀不放过）
不可用于code部分的输入。
仅仅用于用户名等注册内容。

其中一个空格是全角空格，dz不识别，程序自取

第二部分：入库出库显示

本文实例讲述了PHP数据的提交与过滤基本操作。分享给大家供大家参考，具体如下：

1、php提交数据过滤的基本原则

1）提交变量进数据库时，我们必须使用addslashes()进行过滤，像我们的注入问题，一个addslashes()也就搞定了。其实在涉及到变量取值时，intval()函数对字符串的过滤也是个不错的选择。

2）在php.ini中开启magic_quotes_gpc和magic_quotes_runtime。magic_quotes_gpc可以把get,post,cookie里的引号变为斜杠。
magic_quotes_runtime对于进出数据库的数据可以起到格式话的作用。其实，早在以前注入很疯狂时，这个参数就很流行了。

3）在使用系统函数时，必须使用escapeshellarg(),escapeshellcmd()参数去过滤，这样你也就可以放心的使用系统函数。

4）对于跨站，strip_tags(),htmlspecialchars()两个参数都不错，对于用户提交的的带有html和php的标记都将进行转换。比如尖括号"<"就将转化为 "<"这样无害的字符。

1 2	`$new` `= htmlspecialchars("<a href='test'>Test</a>", ENT_QUOTES);` `strip_tags($text,);`

5）对于相关函数的过滤，就像先前的include(),unlink,fopen()等等，只要你把你所要执行操作的变量指定好或者对相关字符过滤严密，我想

这样也就无懈可击了。

2、PHP简单的数据过滤

1）入库: trim($str),addslashes($str)

2）出库: stripslashes($str)

3）显示: htmlspecialchars(nl2br($str))

<?php
/*** global.func.php 公共函数库*/
/*** 返回经addslashes处理过的字符串或数组* @param $string 需要处理的字符串或数组* @return mixed*/
function new_addslashes($string){if(!is_array($string)) return addslashes($string);foreach($string as $key => $val) $string[$key] = new_addslashes($val);return $string;
}
/*** 返回经stripslashes处理过的字符串或数组* @param $string 需要处理的字符串或数组* @return mixed*/
function new_stripslashes($string) {if(!is_array($string)) return stripslashes($string);foreach($string as $key => $val) $string[$key] = new_stripslashes($val);return $string;
}
/*** 返回经htmlspecialchars处理过的字符串或数组* @param $obj 需要处理的字符串或数组* @return mixed*/
function new_html_special_chars($string) {$encoding = 'utf-8';if(strtolower(CHARSET)=='gbk') $encoding = 'ISO-8859-15';if(!is_array($string)) return htmlspecialchars($string,ENT_QUOTES,$encoding);foreach($string as $key => $val) $string[$key] = new_html_special_chars($val);return $string;
}
function new_html_entity_decode($string) {$encoding = 'utf-8';if(strtolower(CHARSET)=='gbk') $encoding = 'ISO-8859-15';return html_entity_decode($string,ENT_QUOTES,$encoding);
}
function new_htmlentities($string) {$encoding = 'utf-8';if(strtolower(CHARSET)=='gbk') $encoding = 'ISO-8859-15';return htmlentities($string,ENT_QUOTES,$encoding);
}
/*** 安全过滤函数** @param $string* @return string*/
function safe_replace($string) {$string = str_replace('%20','',$string);$string = str_replace('%27','',$string);$string = str_replace('%2527','',$string);$string = str_replace('*','',$string);$string = str_replace('"','&quot;',$string);$string = str_replace("'",'',$string);$string = str_replace('"','',$string);$string = str_replace(';','',$string);$string = str_replace('<','&lt;',$string);$string = str_replace('>','&gt;',$string);$string = str_replace("{",'',$string);$string = str_replace('}','',$string);$string = str_replace('\\','',$string);return $string;
}
/*** xss过滤函数** @param $string* @return string*/
function remove_xss($string) {$string = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S', '', $string);$parm1 = Array('javascript', 'vbscript', 'expression', 'applet', 'meta', 'xml', 'blink', 'link', 'script', 'embed', 'object', 'iframe', 'frame', 'frameset', 'ilayer', 'layer', 'bgsound', 'title', 'base');$parm2 = Array('onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur', 'onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavailable', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterchange', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowenter', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload');$parm = array_merge($parm1, $parm2);for ($i = 0; $i < sizeof($parm); $i++) {$pattern = '/';for ($j = 0; $j < strlen($parm[$i]); $j++) {if ($j > 0) {$pattern .= '(';$pattern .= '(&#[x|X]0([9][a][b]);?)?';$pattern .= '|(&#0([9][10][13]);?)?';$pattern .= ')?';}$pattern .= $parm[$i][$j];}$pattern .= '/i';$string = preg_replace($pattern, ' ', $string);}return $string;
}
/*** 过滤ASCII码从0-28的控制字符* @return String*/
function trim_unsafe_control_chars($str) {$rule = '/[' . chr ( 1 ) . '-' . chr ( 8 ) . chr ( 11 ) . '-' . chr ( 12 ) . chr ( 14 ) . '-' . chr ( 31 ) . ']*/';return str_replace ( chr ( 0 ), '', preg_replace ( $rule, '', $str ) );
}
/*** 格式化文本域内容** @param $string 文本域内容* @return string*/
function trim_textarea($string) {$string = nl2br ( str_replace ( ' ', '&nbsp;', $string ) );return $string;
}
/*** 将文本格式成适合js输出的字符串* @param string $string 需要处理的字符串* @param intval $isjs 是否执行字符串格式化，默认为执行* @return string 处理后的字符串*/
function format_js($string, $isjs = 1) {$string = addslashes(str_replace(array("\r", "\n", "\t"), array('', '', ''), $string));return $isjs ? 'document.write("'.$string.'");' : $string;
}
/*** 转义 javascript 代码标记** @param $str* @return mixed*/function trim_script($str) {if(is_array($str)){foreach ($str as $key => $val){$str[$key] = trim_script($val);}}else{$str = preg_replace ( '/\<([\/]?)script([^\>]*?)\>/si', '&lt;\\1script\\2&gt;', $str );$str = preg_replace ( '/\<([\/]?)iframe([^\>]*?)\>/si', '&lt;\\1iframe\\2&gt;', $str );$str = preg_replace ( '/\<([\/]?)frame([^\>]*?)\>/si', '&lt;\\1frame\\2&gt;', $str );$str = str_replace ( 'javascript:', 'javascript：', $str );}return $str;
}
/*** 获取当前页面完整URL地址*/
function get_url() {$sys_protocal = isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == '443' ? 'https://' : 'http://';$php_self = $_SERVER['PHP_SELF'] ? safe_replace($_SERVER['PHP_SELF']) : safe_replace($_SERVER['SCRIPT_NAME']);$path_info = isset($_SERVER['PATH_INFO']) ? safe_replace($_SERVER['PATH_INFO']) : '';$relate_url = isset($_SERVER['REQUEST_URI']) ? safe_replace($_SERVER['REQUEST_URI']) : $php_self.(isset($_SERVER['QUERY_STRING']) ? '?'.safe_replace($_SERVER['QUERY_STRING']) : $path_info);return $sys_protocal.(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '').$relate_url;
}
/*** 字符截取 支持UTF8/GBK* @param $string* @param $length* @param $dot*/
function str_cut($string, $length, $dot = '...') {$strlen = strlen($string);if($strlen <= $length) return $string;$string = str_replace(array(' ','&nbsp;', '&amp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;'), array('∵',' ', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), $string);$strcut = '';if(strtolower(CHARSET) == 'utf-8') {$length = intval($length-strlen($dot)-$length/3);$n = $tn = $noc = 0;while($n < strlen($string)) {$t = ord($string[$n]);if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {$tn = 1; $n++; $noc++;} elseif(194 <= $t && $t <= 223) {$tn = 2; $n += 2; $noc += 2;} elseif(224 <= $t && $t <= 239) {$tn = 3; $n += 3; $noc += 2;} elseif(240 <= $t && $t <= 247) {$tn = 4; $n += 4; $noc += 2;} elseif(248 <= $t && $t <= 251) {$tn = 5; $n += 5; $noc += 2;} elseif($t == 252 || $t == 253) {$tn = 6; $n += 6; $noc += 2;} else {$n++;}if($noc >= $length) {break;}}if($noc > $length) {$n -= $tn;}$strcut = substr($string, 0, $n);$strcut = str_replace(array('∵', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), array(' ', '&amp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;'), $strcut);} else {$dotlen = strlen($dot);$maxi = $length - $dotlen - 1;$current_str = '';$search_arr = array('&',' ', '"', "'", '“', '”', '—', '<', '>', '·', '…','∵');$replace_arr = array('&amp;','&nbsp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;',' ');$search_flip = array_flip($search_arr);for ($i = 0; $i < $maxi; $i++) {$current_str = ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];if (in_array($current_str, $search_arr)) {$key = $search_flip[$current_str];$current_str = str_replace($search_arr[$key], $replace_arr[$key], $current_str);}$strcut .= $current_str;}}return $strcut.$dot;
}
/*** 获取请求ip** @return ip地址*/
function ip() {if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {$ip = getenv('HTTP_CLIENT_IP');} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {$ip = getenv('HTTP_X_FORWARDED_FOR');} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {$ip = getenv('REMOTE_ADDR');} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {$ip = $_SERVER['REMOTE_ADDR'];}return preg_match ( '/[\d\.]{7,15}/', $ip, $matches ) ? $matches [0] : '';
}
function get_cost_time() {$microtime = microtime ( TRUE );return $microtime - SYS_START_TIME;
}
/*** 程序执行时间** @return int 单位ms*/
function execute_time() {$stime = explode ( ' ', SYS_START_TIME );$etime = explode ( ' ', microtime () );return number_format ( ($etime [1] + $etime [0] - $stime [1] - $stime [0]), 6 );
}
/**
* 将字符串转换为数组
*
* @param string $data 字符串
* @return array 返回数组格式，如果，data为空，则返回空数组
*/
function string2array($data) {if($data == '') return array();$data = stripslashes($data);@eval("\$array = $data;");return $array;
}
/**
* 将数组转换为字符串
*
* @param array $data  数组
* @param bool $isformdata 如果为0，则不使用new_stripslashes处理，可选参数，默认为1
* @return string 返回字符串，如果，data为空，则返回空
*/
function array2string($data, $isformdata = 1) {if($data == '') return '';if($isformdata) $data = new_stripslashes($data);return addslashes(var_export($data, TRUE));
}
/**
* 转换字节数为其他单位
*
*
* @param string $filesize 字节大小
* @return string 返回大小
*/
function sizecount($filesize) {if ($filesize >= 1073741824) {$filesize = round($filesize / 1073741824 * 100) / 100 .' GB';} elseif ($filesize >= 1048576) {$filesize = round($filesize / 1048576 * 100) / 100 .' MB';} elseif($filesize >= 1024) {$filesize = round($filesize / 1024 * 100) / 100 . ' KB';} else {$filesize = $filesize.' Bytes';}return $filesize;
}
/**
* 字符串加密、解密函数
*
*
* @param string $txt  字符串
* @param string $operation ENCODE为加密，DECODE为解密，可选参数，默认为ENCODE，
* @param string $key  密钥：数字、字母、下划线
* @param string $expiry  过期时间
* @return string
*/
function sys_auth($string, $operation = 'ENCODE', $key = '', $expiry = 0) {$key_length = 4;$key = md5($key != '' ? $key : app_base::load_config('system', 'auth_key'));$fixedkey = md5($key);$egiskeys = md5(substr($fixedkey, 16, 16));$runtokey = $key_length ? ($operation == 'ENCODE' ? substr(md5(microtime(true)), -$key_length) : substr($string, 0, $key_length)) : '';$keys = md5(substr($runtokey, 0, 16) . substr($fixedkey, 0, 16) . substr($runtokey, 16) . substr($fixedkey, 16));$string = $operation == 'ENCODE' ? sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$egiskeys), 0, 16) . $string : base64_decode(substr($string, $key_length));$i = 0; $result = '';$string_length = strlen($string);for ($i = 0; $i < $string_length; $i++){$result .= chr(ord($string{$i}) ^ ord($keys{$i % 32}));}if($operation == 'ENCODE') {return $runtokey . str_replace('=', '', base64_encode($result));} else {if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$egiskeys), 0, 16)) {return substr($result, 26);} else {return '';}}
}
/**
* 语言文件处理
*
* @param string  $language 标示符
* @param array  $pars 转义的数组,二维数组 ,'key1'=>'value1','key2'=>'value2',
* @param string  $modules 多个模块之间用半角逗号隔开，如：member,guestbook
* @return string  语言字符
*/
function L($language = 'no_language',$pars = array(), $modules = '') {static $LANG = array();static $LANG_MODULES = array();static $lang = '';if(defined('IN_ADMIN')) {$lang = SYS_STYLE ? SYS_STYLE : 'zh-cn';} else {$lang = app_base::load_config('system','lang');}if(!$LANG) {require_once CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.'system.lang.php';if(defined('IN_ADMIN')) require_once CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.'system_menu.lang.php';if(file_exists(CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.ROUTE_M.'.lang.php')) require_once CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.ROUTE_M.'.lang.php';}if(!empty($modules)) {$modules = explode(',',$modules);foreach($modules AS $m) {if(!isset($LANG_MODULES[$m])) require_once CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.$m.'.lang.php';}}if(!array_key_exists($language,$LANG)) {return $language;} else {$language = $LANG[$language];if($pars) {foreach($pars AS $_k=>$_v) {$language = str_replace('{'.$_k.'}',$_v,$language);}}return $language;}
}
/*** 模板调用** @param $module* @param $template* @param $istag* @return unknown_type*/
function template($module = 'content', $template = 'index', $style = '') {if(strpos($module, 'plugin/')!== false) {$plugin = str_replace('plugin/', '', $module);return p_template($plugin, $template,$style);}$module = str_replace('/', DIRECTORY_SEPARATOR, $module);if(!empty($style) && preg_match('/([a-z0-9\-_]+)/is',$style)) {} elseif (empty($style) && !defined('STYLE')) {if(defined('SITEID')) {$siteid = SITEID;} else {$siteid = param::get_cookie('siteid');}if (!$siteid) $siteid = 1;$sitelist = getcache('sitelist','commons');if(!empty($siteid)) {$style = $sitelist[$siteid]['default_style'];}} elseif (empty($style) && defined('STYLE')) {$style = STYLE;} else {$style = 'default';}if(!$style) $style = 'default';$template_cache = app_base::load_sys_class('template_cache');$compiledtplfile = ROOT_PATH.'caches'.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.php';if(file_exists(CODE_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html')) {if(!file_exists($compiledtplfile) || (@filemtime(CODE_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html') > @filemtime($compiledtplfile))) {$template_cache->template_compile($module, $template, $style);}} else {$compiledtplfile = ROOT_PATH.'caches'.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.php';if(!file_exists($compiledtplfile) || (file_exists(CODE_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html') && filemtime(CODE_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html') > filemtime($compiledtplfile))) {$template_cache->template_compile($module, $template, 'default');} elseif (!file_exists(CODE_PATH.'templates'.DIRECTORY_SEPARATOR.'default'.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html')) {showmessage('Template does not exist.'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html');}}return $compiledtplfile;
}
/*** 输出自定义错误** @param $errno 错误号* @param $errstr 错误描述* @param $errfile 报错文件地址* @param $errline 错误行号* @return string 错误提示*/
function my_error_handler($errno, $errstr, $errfile, $errline) {if($errno==8) return '';$errfile = str_replace(ROOT_PATH,'',$errfile);if(app_base::load_config('system','errorlog')) {error_log('<?php exit;?>'.date('m-d H:i:s',SYS_TIME).' | '.$errno.' | '.str_pad($errstr,30).' | '.$errfile.' | '.$errline."\r\n", 3, CACHE_PATH.'error_log.php');} else {$str = '<div style="font-size:12px;text-align:left; border-bottom:1px solid #9cc9e0; border-right:1px solid #9cc9e0;padding:1px 4px;color:#000000;font-family:Arial, Helvetica,sans-serif;"><span>errorno:' . $errno . ',str:' . $errstr . ',file:<font color="blue">' . $errfile . '</font>,line' . $errline .'<br />Need Help?</span></div>';echo $str;}
}
/*** 提示信息页面跳转，跳转地址如果传入数组，页面会提示多个地址供用户选择，默认跳转地址为数组的第一个值，时间为5秒。* showmessage('登录成功', array('默认跳转地址'=>'http://www.baidu.com'));* @param string $msg 提示信息* @param mixed(string/array) $url_forward 跳转地址* @param int $ms 跳转等待时间*/
function showmessage($msg, $url_forward = 'goback', $ms = 1250, $dialog = '', $returnjs = '') {if(defined('IN_ADMIN')) {include(admin::admin_tpl('showmessage', 'admin'));} else {include(template('content', 'message'));}exit;
}
/*** 查询字符是否存在于某字符串** @param $haystack 字符串* @param $needle 要查找的字符* @return bool*/
function str_exists($haystack, $needle)
{return !(strpos($haystack, $needle) === FALSE);
}
/*** 取得文件扩展** @param $filename 文件名* @return 扩展名*/
function fileext($filename) {return strtolower(trim(substr(strrchr($filename, '.'), 1, 10)));
}
/*** 加载模板标签缓存* @param string $name 缓存名* @param integer $times 缓存时间*/
function tpl_cache($name,$times = 0) {$filepath = 'tpl_data';$info = getcacheinfo($name, $filepath);if (SYS_TIME - $info['filemtime'] >= $times) {return false;} else {return getcache($name,$filepath);}
}
/*** 写入缓存，默认为文件缓存，不加载缓存配置。* @param $name 缓存名称* @param $data 缓存数据* @param $filepath 数据路径（模块名称） caches/cache_$filepath/* @param $type 缓存类型[file,memcache,apc]* @param $config 配置名称* @param $timeout 过期时间*/
function setcache($name, $data, $filepath='', $type='file', $c AND ', $in_column = false) {if($in_column && is_array($data)) {$ids = '\''.implode('\',\'', $data).'\'';$sql = "$in_column IN ($ids)";return $sql;} else {if ($front == '') {$front = ' AND ';}if(is_array($data) && count($data) > 0) {$sql = '';foreach ($data as $key => $val) {$sql .= $sql ? " $front $key = '$val' " : " $key = '$val' ";}return $sql;} else {return $data;}}
}
/*** 分页函数** @param $num 信息总数* @param $curr_page 当前分页* @param $perpage 每页显示数* @param $urlrule URL规则* @param $array 需要传递的数组，用于增加额外的方法* @return 分页*/
function pages($num, $curr_page, $perpage = 20, $urlrule = '', $array = array(),$setpages = 10) {if(defined('URLRULE') && $urlrule == '') {$urlrule = URLRULE;$array = $GLOBALS['URL_ARRAY'];} elseif($urlrule == '') {$urlrule = url_par('page={$page}');}$multipage = '';if($num > $perpage) {$page = $setpages+1;$offset = ceil($setpages/2-1);$pages = ceil($num / $perpage);if (defined('IN_ADMIN') && !defined('PAGES')) define('PAGES', $pages);$from = $curr_page - $offset;$to = $curr_page + $offset;$more = 0;if($page >= $pages) {$from = 2;$to = $pages-1;} else {if($from <= 1) {$to = $page-1;$from = 2;} elseif($to >= $pages) {$from = $pages-($page-2);$to = $pages-1;}$more = 1;}//$multipage .= '<a class="a1">'.$num.L('page_item').'</a>';if($curr_page>0) {$multipage .= ' <a href="'.pageurl($urlrule, $curr_page-1, $array).'" class="a1">'.L('previous').'</a>';if($curr_page==1) {$multipage .= ' <span>1</span>';} elseif($curr_page>6 && $more) {$multipage .= ' <a href="'.pageurl($urlrule, 1, $array).'">1</a>..';} else {$multipage .= ' <a href="'.pageurl($urlrule, 1, $array).'">1</a>';}}for($i = $from; $i <= $to; $i++) {if($i != $curr_page) {$multipage .= ' <a href="'.pageurl($urlrule, $i, $array).'">'.$i.'</a>';} else {$multipage .= ' <span>'.$i.'</span>';}}if($curr_page<$pages) {if($curr_page<$pages-5 && $more) {$multipage .= ' ..<a href="'.pageurl($urlrule, $pages, $array).'">'.$pages.'</a> <a href="'.pageurl($urlrule, $curr_page+1, $array).'" class="a1">'.L('next').'</a>';} else {$multipage .= ' <a href="'.pageurl($urlrule, $pages, $array).'">'.$pages.'</a> <a href="'.pageurl($urlrule, $curr_page+1, $array).'" class="a1">'.L('next').'</a>';}} elseif($curr_page==$pages) {$multipage .= ' <span>'.$pages.'</span> <a href="'.pageurl($urlrule, $curr_page, $array).'" class="a1">'.L('next').'</a>';} else {$multipage .= ' <a href="'.pageurl($urlrule, $pages, $array).'">'.$pages.'</a> <a href="'.pageurl($urlrule, $curr_page+1, $array).'" class="a1">'.L('next').'</a>';}}return $multipage;
}
function pages1($num, $curr_page, $perpage = 20, $urlrule = '', $array = array(),$setpages = 10) {if(defined('URLRULE') && $urlrule == '') {$urlrule = URLRULE;$array = $GLOBALS['URL_ARRAY'];} elseif($urlrule == '') {$urlrule = url_par('page={$page}');}$multipage = '';if($num > $perpage) {$page = $setpages+1;$offset = ceil($setpages/2-1);$pages = ceil($num / $perpage);if (defined('IN_ADMIN') && !defined('PAGES')) define('PAGES', $pages);$from = $curr_page - $offset;$to = $curr_page + $offset;$more = 0;if($page >= $pages) {$from = 2;$to = $pages-1;} else {if($from <= 1) {$to = $page-1;$from = 2;} elseif($to >= $pages) {$from = $pages-($page-2);$to = $pages-1;}$more = 1;}//$multipage .= '<a class="a1">'.$num.L('page_item').'</a>';if($curr_page>0) {$multipage .= ' <a href="###" class="a1">'.L('previous').'</a>';if($curr_page==1) {$multipage .= ' <span>1</span>';} elseif($curr_page>6 && $more) {$multipage .= ' <a href="###" /a>..';} else {$multipage .= ' <a href="###" /a>';}}for($i = $from; $i <= $to; $i++) {if($i != $curr_page) {$multipage .= ' <a href="###" /a>';} else {$multipage .= ' <span>'.$i.'</span>';}}if($curr_page<$pages) {if($curr_page<$pages-5 && $more) {$multipage .= ' ..<a href="###" /a> <a href="###" class="a1">'.L('next').'</a>';} else {$multipage .= ' <a href="###" /a> <a href="###" class="a1">'.L('next').'</a>';}} elseif($curr_page==$pages) {$multipage .= ' <span>'.$pages.'</span> <a href="###" class="a1">'.L('next').'</a>';} else {$multipage .= ' <a href="###" /a> <a href="###" class="a1">'.L('next').'</a>';}}return $multipage;
}
function pages2($num, $curr_page, $pages, $urlrule = '', $array = array(),$setpages = 10) {if(defined('URLRULE') && $urlrule == '') {$urlrule = URLRULE;$array = $GLOBALS['URL_ARRAY'];} elseif($urlrule == '') {$urlrule = url_par('page={$page}');}$multipage = '';if($pages > 1) {$page = $setpages+1;$offset = ceil($setpages/2-1);if (defined('IN_ADMIN') && !defined('PAGES')) define('PAGES', $pages);$from = $curr_page - $offset;$to = $curr_page + $offset;$more = 0;if($page >= $pages) {$from = 2;$to = $pages-1;} else {if($from <= 1) {$to = $page-1;$from = 2;} elseif($to >= $pages) {$from = $pages-($page-2);$to = $pages-1;}$more = 1;}//$multipage .= '<a class="a1">'.$num.L('page_item').'</a>';if($curr_page>0) {$multipage .= ' <a href="###" class="a1">'.L('previous').'</a>';if($curr_page==1) {$multipage .= ' <span>1</span>';} elseif($curr_page>6 && $more) {$multipage .= ' <a href="###" /a>..';} else {$multipage .= ' <a href="###" /a>';}}for($i = $from; $i <= $to; $i++) {if($i != $curr_page) {$multipage .= ' <a href="###" /a>';} else {$multipage .= ' <span>'.$i.'</span>';}}if($curr_page<$pages) {if($curr_page<$pages-5 && $more) {$multipage .= ' ..<a href="###" /a> <a href="###" class="a1">'.L('next').'</a>';} else {$multipage .= ' <a href="###" /a> <a href="###" class="a1">'.L('next').'</a>';}} elseif($curr_page==$pages) {$multipage .= ' <span>'.$pages.'</span> <a href="###" class="a1">'.L('next').'</a>';} else {$multipage .= ' <a href="###" /a> <a href="###" class="a1">'.L('next').'</a>';}}return $multipage;
}
/*** 返回分页路径** @param $urlrule 分页规则* @param $page 当前页* @param $array 需要传递的数组，用于增加额外的方法* @return 完整的URL路径*/
function pageurl($urlrule, $page, $array = array()) {if(strpos($urlrule, '~')) {$urlrules = explode('~', $urlrule);$urlrule = $page < 2 ? $urlrules[0] : $urlrules[1];}$findme = array('{$page}');$replaceme = array($page);if (is_array($array)) foreach ($array as $k=>$v) {$findme[] = '{$'.$k.'}';$replaceme[] = $v;}$url = str_replace($findme, $replaceme, $urlrule);$url = str_replace(array('http://','//','~'), array('~','/','http://'), $url);return $url;
}
/*** URL路径解析，pages 函数的辅助函数** @param $par 传入需要解析的变量 默认为，page={$page}* @param $url URL地址* @return URL*/
function url_par($par, $url = '') {if($url == '') $url = get_url();$pos = strpos($url, '?');if($pos === false) {$url .= '?'.$par;} else {$querystring = substr(strstr($url, '?'), 1);parse_str($querystring, $pars);$query_array = array();foreach($pars as $k=>$v) {if($k != 'page') $query_array[$k] = $v;}$querystring = http_build_query($query_array).'&'.$par;$url = substr($url, 0, $pos).'?'.$querystring;}return $url;
}
/*** 判断email格式是否正确* @param $email*/
function is_email($email) {return strlen($email) > 6 && preg_match("/^[\w\-\.]+@[\w\-\.]+(\.\w+)+$/", $email);
}
/*** iconv 编辑转换*/
if (!function_exists('iconv')) {function iconv($in_charset, $out_charset, $str) {$in_charset = strtoupper($in_charset);$out_charset = strtoupper($out_charset);if (function_exists('mb_convert_encoding')) {return mb_convert_encoding($str, $out_charset, $in_charset);} else {app_base::load_sys_func('iconv');$in_charset = strtoupper($in_charset);$out_charset = strtoupper($out_charset);if ($in_charset == 'UTF-8' && ($out_charset == 'GBK' || $out_charset == 'GB2312')) {return utf8_to_gbk($str);}if (($in_charset == 'GBK' || $in_charset == 'GB2312') && $out_charset == 'UTF-8') {return gbk_to_utf8($str);}return $str;}}
}
/*** 代码广告展示函数* @param intval $siteid 所属站点* @param intval $id 广告ID* @return 返回广告代码*/
function show_ad($siteid, $id) {$siteid = intval($siteid);$id = intval($id);if(!$id || !$siteid) return false;$p = app_base::load_model('poster_model');$r = $p->get_one(array('spaceid'=>$id, 'siteid'=>$siteid), 'disabled, setting', 'id ASC');if ($r['disabled']) return '';if ($r['setting']) {$c = string2array($r['setting']);} else {$r['code'] = '';}return $c['code'];
}
/*** 获取当前的站点ID*/
function get_siteid() {static $siteid;if (!empty($siteid)) return $siteid;if (defined('IN_ADMIN')) {if ($d = param::get_cookie('siteid')) {$siteid = $d;} else {return '';}} else {$data = getcache('sitelist', 'commons');if(!is_array($data)) return '1';$site_url = SITE_PROTOCOL.SITE_URL;foreach ($data as $v) {if ($v['url'] == $site_url.'/') $siteid = $v['siteid'];}}if (empty($siteid)) $siteid = 1;return $siteid;
}
/*** 获取用户昵称* 不传入userid取当前用户nickname,如果nickname为空取username* 传入field，取用户$field字段信息*/
function get_nickname($userid='', $field='') {$return = '';if(is_numeric($userid)) {$member_db = app_base::load_model('member_model');$memberinfo = $member_db->get_one(array('userid'=>$userid));if(!empty($field) && $field != 'nickname' && isset($memberinfo[$field]) &&!empty($memberinfo[$field])) {$return = $memberinfo[$field];} else {$return = isset($memberinfo['nickname']) && !empty($memberinfo['nickname']) ? $memberinfo['nickname'].'('.$memberinfo['username'].')' : $memberinfo['username'];}} else {if (param::get_cookie('_nickname')) {$return .= '('.param::get_cookie('_nickname').')';} else {$return .= '('.param::get_cookie('_username').')';}}return $return;
}
/*** 获取用户信息* 不传入$field返回用户所有信息,* 传入field，取用户$field字段信息*/
function get_memberinfo($userid, $field='') {if(!is_numeric($userid)) {return false;} else {static $memberinfo;if (!isset($memberinfo[$userid])) {$member_db = app_base::load_model('member_model');$memberinfo[$userid] = $member_db->get_one(array('userid'=>$userid));}if(!empty($field) && !empty($memberinfo[$userid][$field])) {return $memberinfo[$userid][$field];} else {return $memberinfo[$userid];}}
}
/*** 通过 username 值，获取用户所有信息* 获取用户信息* 不传入$field返回用户所有信息,* 传入field，取用户$field字段信息*/
function get_memberinfo_buyusername($username, $field='') {if(empty($username)){return false;}static $memberinfo;if (!isset($memberinfo[$username])) {$member_db = app_base::load_model('member_model');$memberinfo[$username] = $member_db->get_one(array('username'=>$username));}if(!empty($field) && !empty($memberinfo[$username][$field])) {return $memberinfo[$username][$field];} else {return $memberinfo[$username];}
}
/*** 调用关联菜单* @param $linkageid 联动菜单id* @param $id 生成联动菜单的样式id* @param $defaultvalue 默认值*/
function menu_linkage($linkageid = 0, $id = 'linkid', $defaultvalue = 0, $defaultlabel = array()) {$linkageid = intval($linkageid);$datas = array();$datas = getcache($linkageid,'linkage');$infos = $datas['data'];if($datas['style']=='1') {$title = $datas['title'];$container = 'content'.create_randomnum(100, 999).date('is');if(!defined('DIALOG_INIT_1')) {define('DIALOG_INIT_1', 1);$string .= '<script type="text/javascript" src="'.JS_PATH.'dialog.js"></script>';//TODO $string .= '<link href="'.CSS_PATH.'dialog.css" rel="stylesheet" type="text/css">';}if(!defined('LINKAGE_INIT_1')) {define('LINKAGE_INIT_1', 1);$string .= '<script type="text/javascript" src="'.JS_PATH.'linkage/js/pop.js"></script>';}$var_div = $defaultvalue && (ROUTE_A=='edit' || ROUTE_A=='account_manage_info' || ROUTE_A=='info_publish' || ROUTE_A=='orderinfo') ? menu_linkage_level($defaultvalue,$linkageid,$infos) : $datas['title'];$var_input = $defaultvalue && (ROUTE_A=='edit' || ROUTE_A=='account_manage_info' || ROUTE_A=='info_publish') ? '<input type="hidden" name="info['.$id.']" value="'.$defaultvalue.'">' : '<input type="hidden" name="info['.$id.']" value="">';$string .= '<div name="'.$id.'" value="" id="'.$id.'" class="ib">'.$var_div.'</div>'.$var_input.' <input type="button" name="btn_'.$id.'" class="button" value="'.L('linkage_select').'" >  $string .= '<script type="text/javascript">';$string .= 'var returnid_'.$id.'= \''.$id.'\';';$string .= 'var returnkeyid_'.$id.' = \''.$linkageid.'\';';$string .= 'var '.$container.' = new Array(';foreach($infos AS $k=>$v) {if($v['parentid'] == 0) {$s[]='new Array(\''.$v['linkageid'].'\',\''.$v['name'].'\',\''.$v['parentid'].'\')';} else {continue;}}$s = implode(',',$s);$string .=$s;$string .= ')';$string .= '</script>';} elseif($datas['style']=='2') {if(!defined('LINKAGE_INIT_1')) {define('LINKAGE_INIT_1', 1);$string .= '<script type="text/javascript" src="'.JS_PATH.'linkage/js/jquery.ld.js"></script>';}$default_txt = '';if($defaultvalue) {$default_txt = menu_linkage_level($defaultvalue,$linkageid,$infos);$default_txt = '["'.str_replace(' > ','","',$default_txt).'"]';}$string .= $defaultvalue && (ROUTE_A=='edit' || ROUTE_A=='account_manage_info' || ROUTE_A=='info_publish') ? '<input type="hidden" name="info['.$id.']" id="'.$id.'" value="'.$defaultvalue.'">' : '<input type="hidden" name="info['.$id.']" id="'.$id.'" value="">';for($i=1;$i<=$datas['setting']['level'];$i++) {$txt = isset($defaultlabel[$i]) ? $defaultlabel[$i] : '请选择';$string .='<select class="pc-select-'.$id.'" name="'.$id.'-'.$i.'" id="'.$id.'-'.$i.'" width="100"><option value="">' . $txt . '</option></select> ';}$string .= '<script type="text/javascript">$(function(){var $ld5 = $(".pc-select-'.$id.'");$ld5.ld({ajaxOptions : {"url" : "'.APP_PATH.'api.php?op=get_linkage&act=ajax_select&keyid='.$linkageid.'"},defaultParentId : 0,style : {"width" : 120}})var ld5_api = $ld5.ld("api");//ld5_api.selected('.$default_txt.');$ld5.bind("change",onchange);function onchange(e){var $target = $(e.target);var index = $ld5.index($target);$("#'.$id.'-'.$i.'").remove();$("#'.$id.'").val($ld5.eq(index).show().val());index ++;$ld5.eq(index).show();        }})</script>';} else {$title = $defaultvalue ? $infos[$defaultvalue]['name'] : $datas['title'];$colObj = create_randomnum(100, 999).date('is');$string = '';if(!defined('LINKAGE_INIT')) {define('LINKAGE_INIT', 1);$string .= '<script type="text/javascript" src="'.JS_PATH.'linkage/js/mln.colselect.js"></script>';if(defined('IN_ADMIN')) {$string .= '<link href="'.JS_PATH.'linkage/style/admin.css" rel="stylesheet" type="text/css">';} else {$string .= '<link href="'.JS_PATH.'linkage/style/css.css" rel="stylesheet" type="text/css">';}}$string .= '<input type="hidden" name="info['.$id.']" value="1"><div id="'.$id.'"></div>';$string .= '<script type="text/javascript">';$string .= 'var colObj'.$colObj.' = {"Items":[';foreach($infos AS $k=>$v) {$s .= '{"name":"'.$v['name'].'","topid":"'.$v['parentid'].'","colid":"'.$k.'","value":"'.$k.'","fun":function(){}},';}$string .= substr($s, 0, -1);$string .= ']};';$string .= '$("#'.$id.'").mlnColsel(colObj'.$colObj.',{';$string .= 'title:"'.$title.'",';$string .= 'value:"'.$defaultvalue.'",';$string .= 'width:100';$string .= '});';$string .= '</script>';}return $string;
}
/*** 联动菜单层级*/
function menu_linkage_level($linkageid,$keyid,$infos,$result=array()) {if(array_key_exists($linkageid,$infos)) {$result[]=$infos[$linkageid]['name'];return menu_linkage_level($infos[$linkageid]['parentid'],$keyid,$infos,$result);}krsort($result);return implode(' > ',$result);
}
/*** 通过catid获取显示菜单完整结构* @param $menuid 菜单ID* @param $cache_file 菜单缓存文件名称* @param $cache_path 缓存文件目录* @param $key 取得缓存值的键值名称* @param $parentkey 父级的ID* @param $linkstring 链接字符*/
function menu_level($menuid, $cache_file, $cache_path = 'commons', $key = 'catname', $parentkey = 'parentid', $linkstring = ' > ', $result=array()) {$menu_arr = getcache($cache_file, $cache_path);if (array_key_exists($menuid, $menu_arr)) {$result[] = $menu_arr[$menuid][$key];return menu_level($menu_arr[$menuid][$parentkey], $cache_file, $cache_path, $key, $parentkey, $linkstring, $result);}krsort($result);return implode($linkstring, $result);
}
/*** 通过id获取显示联动菜单* @param $linkageid 联动菜单ID* @param $keyid 菜单keyid* @param $space 菜单间隔符* @param $tyoe 1 返回间隔符链接，完整路径名称 3 返回完整路径数组，2返回当前联动菜单名称，4 直接返回ID* @param $result 递归使用字段1* @param $infos 递归使用字段2*/
function get_linkage($linkageid, $keyid, $space = '>', $type = 1, $result = array(), $infos = array()) {if($space=='' || !isset($space))$space = '>';if(!$infos) {$datas = getcache($keyid,'linkage');$infos = $datas['data'];}if($type == 1 || $type == 3 || $type == 4) {if(array_key_exists($linkageid,$infos)) {$result[]= ($type == 1) ? $infos[$linkageid]['name'] : (($type == 4) ? $linkageid :$infos[$linkageid]);return get_linkage($infos[$linkageid]['parentid'], $keyid, $space, $type, $result, $infos);} else {if(count($result)>0) {krsort($result);if($type == 1 || $type == 4) $result = implode($space,$result);return $result;} else {return $result;}}} else {return $infos[$linkageid]['name'];}
}
/*** IE浏览器判断*/
function is_ie() {$useragent = strtolower($_SERVER['HTTP_USER_AGENT']);if((strpos($useragent, 'opera') !== false) || (strpos($useragent, 'konqueror') !== false)) return false;if(strpos($useragent, 'msie ') !== false) return true;return false;
}
/*** 文件下载* @param $filepath 文件路径* @param $filename 文件名称*/
function file_down($filepath, $filename = '') {if(!$filename) $filename = basename($filepath);if(is_ie()) $filename = rawurlencode($filename);$filetype = fileext($filename);$filesize = sprintf("%u", filesize($filepath));if(ob_get_length() !== false) @ob_end_clean();header('Pragma: public');header('Last-Modified: '.gmdate('D, d M Y H:i:s') . ' GMT');header('Cache-Control: no-store, no-cache, must-revalidate');header('Cache-Control: pre-check=0, post-check=0, max-age=0');header('Content-Transfer-Encoding: binary');header('Content-Encoding: none');header('Content-type: '.$filetype);header('Content-Disposition: attachment; filename="'.$filename.'"');header('Content-length: '.$filesize);readfile($filepath);exit;
}
/*** 判断字符串是否为utf8编码，英文和半角字符返回ture* @param $string* @return bool*/
function is_utf8($string) {return preg_match('%^(?:[\x09\x0A\x0D\x20-\x7E] # ASCII| [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte| \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte| \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates| \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16)*$%xs', $string);
}
/*** 组装生成ID号* @param $modules 模块名* @param $contentid 内容ID* @param $siteid 站点ID*/
function id_encode($modules,$contentid, $siteid) {return urlencode($modules.'-'.$contentid.'-'.$siteid);
}
/*** 解析ID* @param $id 评论ID*/
function id_decode($id) {return explode('-', $id);
}
/*** 对用户的密码进行加密* @param $password* @param $encrypt //传入加密串，在修改密码时做认证* @return array/password*/
function password($password, $encrypt='') {$pwd = array();$pwd['encrypt'] = $encrypt ? $encrypt : create_randomstr();$pwd['password'] = md5(md5(trim($password)).$pwd['encrypt']);return $encrypt ? $pwd['password'] : $pwd;
}
/*** 生成随机字符串* @param string $lenth 长度* @return string 字符串*/
function create_randomstr($lenth = 6) {//openssl_random_pseudo_bytes$fp = @fopen('/dev/urandom','rb');$pr_bits = '';if ($fp !== FALSE) {$pr_bits .= @fread($fp,$lenth/2);@fclose($fp);}return bin2hex($pr_bits);//return random($lenth, '123456789abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ');
}
/*** 生成随机数* @param string $lenth 长度* @return string 字符串*/
function create_randomnum($min,$max) {//openssl_random_pseudo_bytes$difference = $max-$min;$bytesNeeded = ceil($difference/256);$fp = @fopen('/dev/urandom','rb');if ($fp !== FALSE) {$randomBytes = @fread($fp,$bytesNeeded);@fclose($fp);}$sum = 0;for ($a = 0; $a < $bytesNeeded; $a++){$sum += ord($randomBytes[$a]);}$sum = $sum % ($difference);return $sum + $min;//return random($lenth, '123456789abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ');
}
/*** 检查密码长度是否符合规定** @param STRING $password* @return  TRUE or FALSE*/
function is_password($password) {$strlen = strlen($password);if($strlen >= 6 && $strlen <= 20) return true;return false;
}/*** 检测输入中是否含有错误字符** @param char $string 要检查的字符串名称* @return TRUE or FALSE*/
function is_badword($string) {$badwords = array("\\",'&',' ',"'",'"','/','*',',','<','>',"\r","\t","\n","#");foreach($badwords as $value){if(strpos($string, $value) !== FALSE) {return TRUE;}}return FALSE;
}
/*** 检查用户名是否符合规定** @param STRING $username 要检查的用户名* @return  TRUE or FALSE*/
function is_username($username) {$strlen = strlen($username);if(is_badword($username) || !preg_match("/^[a-zA-Z0-9_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]+$/", $username)){return false;} elseif ( 20 < $strlen || $strlen < 2 ) {return false;}return true;
}
/*** 检查id是否存在于数组中** @param $id* @param $ids* @param $s*/
function check_in($id, $ids = '', $s = ',') {if(!$ids) return false;$ids = explode($s, $ids);return is_array($id) ? array_intersect($id, $ids) : in_array($id, $ids);
}
/*** 对数据进行编码转换* @param array/string $data  数组* @param string $input  需要转换的编码* @param string $output 转换后的编码*/
function array_iconv($data, $input = 'gbk', $output = 'utf-8') {if (!is_array($data)) {return iconv($input, $output, $data);} else {foreach ($data as $key=>$val) {if(is_array($val)) {$data[$key] = array_iconv($val, $input, $output);} else {$data[$key] = iconv($input, $output, $val);}}return $data;}
}
/*** 生成缩略图函数* @param $imgurl 图片路径* @param $width 缩略图宽度* @param $height 缩略图高度* @param $autocut 是否自动裁剪 默认裁剪，当高度或宽度有一个数值为0是，自动关闭* @param $smallpic 无图片是默认图片路径*/
function thumb($imgurl, $width = 100, $height = 100 ,$autocut = 1, $smallpic = 'nopic.gif') {global $image;$upload_url = app_base::load_config('system','upload_url');$upload_path = app_base::load_config('system','upload_path');if(empty($imgurl)) return IMG_PATH.$smallpic;$imgurl_replace= str_replace($upload_url, '', $imgurl);if(!extension_loaded('gd') || strpos($imgurl_replace, '://')) return $imgurl;if(!file_exists($upload_path.$imgurl_replace)) return IMG_PATH.$smallpic;list($width_t, $height_t, $type, $attr) = getimagesize($upload_path.$imgurl_replace);if($width>=$width_t || $height>=$height_t) return $imgurl;$newimgurl = dirname($imgurl_replace).'/thumb_'.$width.'_'.$height.'_'.basename($imgurl_replace);if(file_exists($upload_path.$newimgurl)) return $upload_url.$newimgurl;if(!is_object($image)) {app_base::load_sys_class('image','','0');$image = new image(1,0);}return $image->thumb($upload_path.$imgurl_replace, $upload_path.$newimgurl, $width, $height, '', $autocut) ? $upload_url.$newimgurl : $imgurl;
}
/*** 水印添加* @param $source 原图片路径* @param $target 生成水印图片途径，默认为空，覆盖原图* @param $siteid 站点id，系统需根据站点id获取水印信息*/
function watermark($source, $target = '',$siteid) {global $image_w;if(empty($source)) return $source;if(!extension_loaded('gd') || strpos($source, '://')) return $source;if(!$target) $target = $source;if(!is_object($image_w)){app_base::load_sys_class('image','','0');$image_w = new image(0,$siteid);}$image_w->watermark($source, $target);return $target;
}
/*** 当前路径* 返回指定栏目路径层级* @param $catid 栏目id* @param $symbol 栏目间隔符*/
function catpos($catid, $symbol=' > '){$category_arr = array();$siteids = getcache('category_content','commons');$siteid = $siteids[$catid];$category_arr = getcache('category_content_'.$siteid,'commons');if(!isset($category_arr[$catid])) return '';$pos = '';$siteurl = siteurl($category_arr[$catid]['siteid']);$arrparentid = array_filter(explode(',', $category_arr[$catid]['arrparentid'].','.$catid));foreach($arrparentid as $catid) {$url = $category_arr[$catid]['url'];// if(strpos($url, '://') === false) $url = $siteurl.$url;$pos .= '<a href="'.$url.'">'.$category_arr[$catid]['catname'].'</a>'.$symbol;}return $pos;
}
/*** 根据catid获取子栏目数据的sql语句* @param string $module 缓存文件名* @param intval $catid 栏目ID*/
function get_sql_catid($file = 'category_content_1', $catid = 0, $module = 'commons') {$category = getcache($file,$module);$catid = intval($catid);if(!isset($category[$catid])) return false;return $category[$catid]['child'] ? " catid IN(".$category[$catid]['arrchildid'].") " : " catid=$catid ";
}
/*** 获取子栏目* @param $parentid 父级id* @param $type 栏目类型* @param $self 是否包含本身 0为不包含* @param $siteid 站点id*/
function subcat($parentid = NULL, $type = NULL,$self = '0', $siteid = '') {if (empty($siteid)) $siteid = get_siteid();$category = getcache('category_content_'.$siteid,'commons');foreach($category as $id=>$cat) {if($cat['siteid'] == $siteid && ($parentid === NULL || $cat['parentid'] == $parentid) && ($type === NULL || $cat['type'] == $type)) $subcat[$id] = $cat;if($self == 1 && $cat['catid'] == $parentid && !$cat['child']) $subcat[$id] = $cat;}return $subcat;
}
/*** 获取内容地址* @param $catid 栏目ID* @param $id  文章ID* @param $allurl 是否以绝对路径返回*/
function go($catid,$id, $allurl = 0) {static $category;if(empty($category)) {$siteids = getcache('category_content','commons');$siteid = $siteids[$catid];$category = getcache('category_content_'.$siteid,'commons');}$id = intval($id);if(!$id || !isset($category[$catid])) return '';$modelid = $category[$catid]['modelid'];if(!$modelid) return '';$db = app_base::load_model('content_model');$db->set_model($modelid);$r = $db->setCache()->get_one(array('id'=>$id), 'url');if (!empty($allurl)) {if (strpos($r['url'], '://')===false) {if (strpos($category[$catid]['url'], '://') === FALSE) {$site = siteinfo($category[$catid]['siteid']);$r['url'] = substr($site['domain'], 0, -1).$r['url'];} else {$r['url'] = $category[$catid]['url'].$r['url'];}}}return $r['url'];
}
/*** 将附件地址转换为绝对地址* @param $path 附件地址*/
function atturl($path) {if(strpos($path, ':/')) {return $path;} else {$sitelist = getcache('sitelist','commons');$siteid = get_siteid();$siteurl = $sitelist[$siteid]['domain'];$domainlen = strlen($sitelist[$siteid]['domain'])-1;$path = $siteurl.$path;$path = substr_replace($path, '/', strpos($path, '//',$domainlen),2);return  $path;}
}
/*** 判断模块是否安装* @param $m 模块名称*/
function module_exists($m = '') {if ($m=='admin') return true;$modules = getcache('modules', 'commons');$modules = array_keys($modules);return in_array($m, $modules);
}
/*** 生成SEO* @param $siteid  站点ID* @param $catid  栏目ID* @param $title  标题* @param $description 描述* @param $keyword  关键词*/
function seo($siteid, $catid = '', $title = '', $description = '', $keyword = '') {if (!empty($title))$title = strip_tags($title);if (!empty($description)) $description = strip_tags($description);if (!empty($keyword)) $keyword = str_replace(' ', ',', strip_tags($keyword));$sites = getcache('sitelist', 'commons');$site = $sites[$siteid];$cat = array();if (!empty($catid)) {$siteids = getcache('category_content','commons');$siteid = $siteids[$catid];$categorys = getcache('category_content_'.$siteid,'commons');$cat = $categorys[$catid];$cat['setting'] = string2array($cat['setting']);}$seo['site_title'] =isset($site['site_title']) && !empty($site['site_title']) ? $site['site_title'] : $site['name'];$seo['keyword'] = !empty($keyword) ? $keyword : $site['keywords'];$seo['description'] = isset($description) && !empty($description) ? $description : (isset($cat['setting']['meta_description']) && !empty($cat['setting']['meta_description']) ? $cat['setting']['meta_description'] : (isset($site['description']) && !empty($site['description']) ? $site['description'] : ''));$seo['title'] = (isset($title) && !empty($title) ? $title.' - ' : '').(isset($cat['setting']['meta_title']) && !empty($cat['setting']['meta_title']) ? $cat['setting']['meta_title'].' - ' : (isset($cat['catname']) && !empty($cat['catname']) ? $cat['catname'].' - ' : ''));foreach ($seo as $k=>$v) {$seo[$k] = str_replace(array("\n","\r"), '', $v);}return $seo;
}
/*** 获取站点的信息* @param $siteid 站点ID*/
function siteinfo($siteid) {static $sitelist;if (empty($sitelist)) $sitelist = getcache('sitelist','commons');return isset($sitelist[$siteid]) ? $sitelist[$siteid] : '';
}
/*** 生成CNZZ统计代码*/
function tjcode() {if(!module_exists('cnzz')) return false;$config = getcache('cnzz', 'commons');if (empty($config)) {return false;} else {return '<script src=\'http://pw.cnzz.com/c.php?id='.$config['siteid'].'&l=2\' language=\'JavaScript\' charset=\'gb2312\'></script>';}
}
/*** 生成标题样式* @param $style 样式* @param $html 是否显示完整的STYLE*/
function title_style($style, $html = 1) {$str = '';if ($html) $str = ' style="';$style_arr = explode(';',$style);if (!empty($style_arr[0])) $str .= 'color:'.$style_arr[0].';';if (!empty($style_arr[1])) $str .= 'font-weight:'.$style_arr[1].';';if ($html) $str .= '" ';return $str;
}
/*** 获取站点域名* @param $siteid 站点id*/
function siteurl($siteid) {static $sitelist;return WEB_PATH;
// if(!$siteid) return WEB_PATH;
// if(empty($sitelist)) $sitelist = getcache('sitelist','commons');
// return substr($sitelist[$siteid]['domain'],0,-1);
}
/*** 生成上传附件验证* @param $args 参数* @param $operation 操作类型(加密解密)*/
function upload_key($args) {$pc_auth_key = md5(app_base::load_config('system','auth_key').$_SERVER['HTTP_USER_AGENT']);$authkey = md5($args.$pc_auth_key);return $authkey;
}
/*** 文本转换为图片* @param string $txt 图形化文本内容* @param int $fonttype 无外部字体时生成文字大小，取值范围1-5* @param int $fontsize 引入外部字体时，字体大小* @param string $font 字体名称 字体请放于app\libs\data\font下* @param string $fontcolor 字体颜色 十六进制形式 如FFFFFF,FF0000*/
function string2img($txt, $fonttype = 5, $fontsize = 16, $font = '', $fontcolor = 'FF0000',$transparent = '1') {if(empty($txt)) return false;if(function_exists("imagepng")) {$txt = urlencode(sys_auth($txt));$txt = '<img src="'.APP_PATH.'api.php?op=creatimg&txt='.$txt.'&f '.$version['pc_release'];}
}
/*** 运行钩子（插件使用）*/
function runhook($method) {$time_start = getmicrotime();$data = '';$getpclass = FALSE;$hook_appid = getcache('hook','plugins');if(!empty($hook_appid)) {foreach($hook_appid as $appid => $p) {$pluginfilepath = CODE_PATH.'plugin'.DIRECTORY_SEPARATOR.$p.DIRECTORY_SEPARATOR.'hook.class.php';$getpclass = TRUE;include_once $pluginfilepath;}$hook_appid = array_flip($hook_appid);if($getpclass) {$pclass = new ReflectionClass('hook');foreach($pclass->getMethods() as $r) {$legalmethods[] = $r->getName();}}if(in_array($method,$legalmethods)) {foreach (get_declared_classes() as $class){$refclass = new ReflectionClass($class);if($refclass->isSubclassOf('hook')){if ($_method = $refclass->getMethod($method)) {$classname = $refclass->getName();if ($_method->isPublic() && $_method->isFinal()) {plugin_stat($hook_appid[$classname]);$data .= $_method->invoke(null);}}}}}return $data;}
}
function getmicrotime() {list($usec, $sec) = explode(" ",microtime());return ((float)$usec + (float)$sec);
}
/*** 插件前台模板加载* Enter description here ...* @param unknown_type $module* @param unknown_type $template* @param unknown_type $style*/
function p_template($plugin = 'content', $template = 'index',$style='default') {if(!$style) $style = 'default';$template_cache = app_base::load_sys_class('template_cache');$compiledtplfile = ROOT_PATH.'caches'.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.'plugin'.DIRECTORY_SEPARATOR.$plugin.DIRECTORY_SEPARATOR.$template.'.php';if(!file_exists($compiledtplfile) || (file_exists(CODE_PATH.'plugin'.DIRECTORY_SEPARATOR.$plugin.DIRECTORY_SEPARATOR.'templates'.DIRECTORY_SEPARATOR.$template.'.html') && filemtime(CODE_PATH.'plugin'.DIRECTORY_SEPARATOR.$plugin.DIRECTORY_SEPARATOR.'templates'.DIRECTORY_SEPARATOR.$template.'.html') > filemtime($compiledtplfile))) {$template_cache->template_compile('plugin/'.$plugin, $template, 'default');} elseif (!file_exists(CODE_PATH.'plugin'.DIRECTORY_SEPARATOR.$plugin.DIRECTORY_SEPARATOR.'templates'.DIRECTORY_SEPARATOR.$template.'.html')) {showmessage('Template does not exist.'.DIRECTORY_SEPARATOR.'plugin'.DIRECTORY_SEPARATOR.$plugin.DIRECTORY_SEPARATOR.$template.'.html');}return $compiledtplfile;
}
/*** 读取缓存动态页面*/
function cache_page_start() {$relate_url = isset($_SERVER['REQUEST_URI']) ? safe_replace($_SERVER['REQUEST_URI']) : $php_self.(isset($_SERVER['QUERY_STRING']) ? '?'.safe_replace($_SERVER['QUERY_STRING']) : $path_info);define('CACHE_PAGE_ID', md5($relate_url));$contents = getcache(CACHE_PAGE_ID, 'page_tmp/'.substr(CACHE_PAGE_ID, 0, 2));if($contents && intval(substr($contents, 15, 10)) > SYS_TIME) {echo substr($contents, 29);exit;}if (!defined('HTML')) define('HTML',true);return true;
}
/*** 写入缓存动态页面*/
function cache_page($ttl = 360, $isjs = 0) {if($ttl == 0 || !defined('CACHE_PAGE_ID')) return false;$contents = ob_get_contents();if($isjs) $contents = format_js($contents);$contents = "<!--expiretime:".(SYS_TIME + $ttl)."-->\n".$contents;setcache(CACHE_PAGE_ID, $contents, 'page_tmp/'.substr(CACHE_PAGE_ID, 0, 2));
}
/**** 获取远程内容* @param $url 接口url地址* @param $timeout 超时时间*/
function pc_file_get_contents($url, $timeout=30) {$stream = stream_context_create(array('http' => array('timeout' => $timeout)));return @file_get_contents($url, 0, $stream);
}
/*** Function get_vid* 获取视频信息* @param int $contentid 内容ID 必须* @param int $catid 栏目id 取内容里面视频信息时必须* @param int $isspecial 是否取专题的视频信息*/
function get_vid($contentid = 0, $catid = 0, $isspecial = 0) {static $categorys;if (!$contentid) return false;if (!$isspecial) {if (!$catid) return false;$contentid = intval($contentid);$catid = intval($catid);$siteid = get_siteid();if (!$categorys) {$categorys = getcache('category_content_'.$siteid, 'commons');}$modelid = $categorys[$catid]['modelid'];$video_content = app_base::load_model('video_content_model');$r = $video_content->get_one(array('contentid'=>$contentid, 'modelid'=>$modelid), 'videoid', 'listorder ASC');$video_store =app_base::load_model('video_store_model');return $video_store->get_one(array('videoid'=>$r['videoid']));} else {$special_content = app_base::load_model('special_content_model');$contentid = intval($contentid);$video_store =app_base::load_model('video_store_model');$r = $special_content->get_one(array('id'=>$contentid), 'videoid');return $video_store->get_one(array('videoid'=>$r['videoid']));}
}
/*** Function dataformat* 时间转换* @param $n INT时间*/function dataformat($n) {$hours = floor($n/3600);$minite = floor($n%3600/60);$secend = floor($n%3600%60);$minite = $minite < 10 ? "0".$minite : $minite;$secend = $secend < 10 ? "0".$secend : $secend;if($n >= 3600){return $hours.":".$minite.":".$secend;}else{return $minite.":".$secend;}}function httpResponse($status, $msg=''){$m = app_base::load_model('category_model');$CATEGORYS = $m->select(array('parentid'=>0),'*','','listorder');include CODE_PATH . 'libs'.DIRECTORY_SEPARATOR.'data'.DIRECTORY_SEPARATOR.'http'.DIRECTORY_SEPARATOR.$status.'.php';}function array_change_key_case_recursive($arr){if(! $arr || !is_array($arr))return array();return array_map(function($item){if(is_array($item))$item = array_change_key_case_recursive($item);return $item;},array_change_key_case($arr));}function visitauth(){$vtime = time();$vsign = md5("cuichuande@ideadata.com.cn#$%" . $vtime);return "tm={$vtime}&sn={$vsign}";}
?>

第三部分

防止sql注入的函数，过滤掉那些非法的字符,提高sql安全性，同时也可以过滤XSS的攻击。
function filter($str)
{if (empty($str)) return false;$str = htmlspecialchars($str);$str = str_replace( '/', "", $str);$str = str_replace( '"', "", $str);$str = str_replace( '(', "", $str);$str = str_replace( ')', "", $str);$str = str_replace( 'CR', "", $str);$str = str_replace( 'ASCII', "", $str);$str = str_replace( 'ASCII 0x0d', "", $str);$str = str_replace( 'LF', "", $str);$str = str_replace( 'ASCII 0x0a', "", $str);$str = str_replace( ',', "", $str);$str = str_replace( '%', "", $str);$str = str_replace( ';', "", $str);$str = str_replace( 'eval', "", $str);$str = str_replace( 'open', "", $str);$str = str_replace( 'sysopen', "", $str);$str = str_replace( 'system', "", $str);$str = str_replace( '$', "", $str);$str = str_replace( "'", "", $str);$str = str_replace( "'", "", $str);$str = str_replace( 'ASCII 0x08', "", $str);$str = str_replace( '"', "", $str);$str = str_replace( '"', "", $str);$str = str_replace("", "", $str);$str = str_replace("&gt", "", $str);$str = str_replace("&lt", "", $str);$str = str_replace("<SCRIPT>", "", $str);$str = str_replace("</SCRIPT>", "", $str);$str = str_replace("<script>", "", $str);$str = str_replace("</script>", "", $str);$str = str_replace("select","",$str);$str = str_replace("join","",$str);$str = str_replace("union","",$str);$str = str_replace("where","",$str);$str = str_replace("insert","",$str);$str = str_replace("delete","",$str);$str = str_replace("update","",$str);$str = str_replace("like","",$str);$str = str_replace("drop","",$str);$str = str_replace("DROP","",$str);$str = str_replace("create","",$str);$str = str_replace("modify","",$str);$str = str_replace("rename","",$str);$str = str_replace("alter","",$str);$str = str_replace("cas","",$str);$str = str_replace("&","",$str);$str = str_replace(">","",$str);$str = str_replace("<","",$str);$str = str_replace(" ",chr(32),$str);$str = str_replace(" ",chr(9),$str);$str = str_replace("    ",chr(9),$str);$str = str_replace("&",chr(34),$str);$str = str_replace("'",chr(39),$str);$str = str_replace("<br />",chr(13),$str);$str = str_replace("''","'",$str);$str = str_replace("css","'",$str);$str = str_replace("CSS","'",$str);$str = str_replace("<!--","",$str);$str = str_replace("convert","",$str);$str = str_replace("md5","",$str);$str = str_replace("passwd","",$str);$str = str_replace("password","",$str);$str = str_replace("../","",$str);$str = str_replace("./","",$str);$str = str_replace("Array","",$str);$str = str_replace("or 1='1'","",$str);$str = str_replace(";set|set&set;","",$str);$str = str_replace("`set|set&set`","",$str);$str = str_replace("--","",$str);$str = str_replace("OR","",$str);$str = str_replace('"',"",$str);$str = str_replace("*","",$str);$str = str_replace("-","",$str);$str = str_replace("+","",$str);$str = str_replace("/","",$str);$str = str_replace("=","",$str);$str = str_replace("'/","",$str);$str = str_replace("-- ","",$str);$str = str_replace(" -- ","",$str);$str = str_replace(" --","",$str);$str = str_replace("(","",$str);$str = str_replace(")","",$str);$str = str_replace("{","",$str);$str = str_replace("}","",$str);$str = str_replace("-1","",$str);$str = str_replace("1","",$str);$str = str_replace(".","",$str);$str = str_replace("response","",$str);$str = str_replace("write","",$str);$str = str_replace("|","",$str);$str = str_replace("`","",$str);$str = str_replace(";","",$str);$str = str_replace("etc","",$str);$str = str_replace("root","",$str);$str = str_replace("//","",$str);$str = str_replace("!=","",$str);$str = str_replace("$","",$str);$str = str_replace("&","",$str);$str = str_replace("&&","",$str);$str = str_replace("==","",$str);$str = str_replace("#","",$str);$str = str_replace("@","",$str);$str = str_replace("mailto:","",$str);$str = str_replace("CHAR","",$str);$str = str_replace("char","",$str);return $str;
}更加简便的防止sql注入的方法（推荐使用这个）：if (!get_magic_quotes_gpc()) // 判断magic_quotes_gpc是否为打开    {    $post = addslashes($name); // magic_quotes_gpc没有打开的时候把数据过滤    }    $name = str_replace("_", "\_", $name); // 把 '_'过滤掉  $name = str_replace("%", "\%", $name); // 把' % '过滤掉    $name = nl2br($name); // 回车转换    $name= htmlspecialchars($name); // html标记转换   return $name;

PHP防XSS 防SQL注入的代码

/*** 过滤参数* @param string $str 接受的参数* @return string*/
static public function filterWords($str)
{$farr = array("/<(\\/?)(script|i?frame|style|html|body|title|link|meta|object|\\?|\\%)([^>]*?)>/isU","/(<[^>]*)on[a-zA-Z]+\s*=([^>]*>)/isU","/select|insert|update|delete|\'|\/\*|\*|\.\.\/|\.\/|union|into|load_file|outfile|dump/is");$str = preg_replace($farr,'',$str);return $str;
}/*** 过滤接受的参数或者数组,如$_GET,$_POST* @param array|string $arr 接受的参数或者数组* @return array|string*/
static public function filterArr($arr)
{if(is_array($arr)){foreach($arr as $k => $v){$arr[$k] = self::filterWords($v);}}else{$arr = self::filterWords($v);}return $arr;
}

在防止被注入攻击时，常会用到两个函数：htmlspecialchars()和addslashes() 、trim()函数。这两个函数都是对特殊字符进行转义。1）addslashes()作用及使用addslashes()通常用于防止sql注入，它可对通过get，post和cookie传递过来的参数的单引号和双引号已经null前加“\”进行转义如：如变量$str=$_POST["str"];的值为：bb' or 1='1。通过addslashes()函数过滤后会变为：bb\' or 1=\'1；2）htmlspecialchars()作用及使用htmlspecialchars()也是对字符进行转义，与addslashes（）不同的是htmlspecialchars()是将特殊字符用引用实体替换。如<script>alert('xss')</script>通过htmlspecialchars()过滤后为<script>alert('xss')</script&gt3）addslashes()与htmlspecialchars()的区别除了两个函数的转义方式不同外，它们的使用也不同。addslashes()通过用于防止sql语句注入，在执行sql语句前对通过get、post和cookie传递来的参数中的单引号，双引号，\ 和null进行转义。但sql执行成功后，插入到数据库中的数据是不带有转义字符\的。这是如果插入到数据库中的是一些js脚本，当这些脚本被读取出来时还是会被执行。这是我们可对读取出来的数据使用htmlspecialchars()进行过滤，避免执行被注入的脚本。