下面为大家带来一篇PHP面向对象之事务脚本模式(详解)。内容挺不错的，现在就分享给大家，也给大家做个参考。
如下所示：
/*
事务脚本模式: 类似于thinkphp中的model层，或者说就是操作数据库的类。
个人觉得实践中使用起来还是挺简单方便的，就是SQL语句写死了的话，灵活性就不够。
示例代码如下：
*/
namespace woo\process;
abstract class Base{
static $DB; //pdo对象
static $stmts = array(); //sql语句句柄
function __construct (){
$dsn = \woo\base\ApplicationRegistry::getDSN();
if(is_null($dsn)){
throw new \woo\base\AppException("No DSN");
}
self::$DB = new PDO($dsn);
self::$DB->setAttribute(\PDO::ATTR_ERRMODE,\PDO::ERRMODE_EXCEPTION);
}
function prepareStatement($stmt_s){ //缓存sql语句句柄
if(isset(self::$stmts($stmt_s)){
return self::$stmts[$stmt_s];
}
$stmt_handle = self::$DB->prepare($stmt_s);
self::$stmts[$stmt_s] = $stmt_handle;
return $stmt_handle;
}
protected function doStatement($stmt_s,$values_a){ //执行sql并获取一个语句资源
$sth = $this->prepareStatement($stmt_s);
$sth->closeCursor();
$db_result = $sth->execute($values_a);
return $sth;
}
}
//这个类就是向数据库中写入一些数据，比较简单没什么好多说的
class VenueManager extends Base{
static $add_venue = "INSERT INTO venue (name) values(?)";
static $add_space = "INSERT INTO space (name,venue) values(?,?)";
static $check_slot = "SELECT id,name FROM event WHERE space = ? AND (start+duration)>? AND start ";
static $add_event = "INSERT INTO event (name,space,start,duration) values(?,?,?,?)";
function addVenue($name,$space_array){
$ret = array();
$ret['venue'] = array($name);
$this->doStatement(self::$add_venue,$ret['venue']);
$v_id = self::$DB->lastInsertId();
$ret['spaces'] = array();
foreach($space_array as $space_name){
$values = array($space_name,$v_id);
$this->doStatement(self::$add_space,$values);
$s_id = self::$DB->lastInsertId();
array_unshift($values,$s_id);
$ret['spaces'][] = $values;
}
return $ret;
}
function bookEvent ($space_id,$name,$time,$duration){
$values = array($space_id,$time,($time+$duration));
$stmt = $this->doStatement(self::$check_slot,$values,false);
if($result = $stmt->fetch()){
throw new \woo\base\AppException("double booked! try again");
}
$this->doStatement(self::$add_event,array($name,$space_id,$time,$duration));
}
}
//客户端,使用起来还是比较简便的
$venue = new VenueManager();
$venue->addVenue('test',array('test1','test2','test3'));
以上就是本文的全部内容，希望对大家的学习有所帮助，更多相关内容请关注PHP中文网！
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