这篇文章的主要内容是介绍了关于php加密类 ，有着一定的参考价值，现在分享给大家，有需要的朋友可以参考一下

namespace app\index\controller;class Crypt{

private $key = "";

public function __construct($key = null)

{

if (!is_null($key)) {

$this->key = $key;

}

}

//加密函数

public function passport_encrypt($txt)

{

srand((double)microtime() * 1000000);

$encrypt_key = md5(rand(0, 32000));

$ctr = 0;

$tmp = '';

for ($i = 0; $i < strlen($txt); $i++) {

$ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;

$tmp .= $encrypt_key[$ctr] . ($txt[$i] ^ $encrypt_key[$ctr++]);

}

return urlencode(base64_encode($this->passport_key($tmp, $this->key)));

}

//解密函数

public function passport_decrypt($txt)

{

$txt = $this->passport_key(base64_decode(urldecode($txt)), $this->key);

$tmp = '';

for ($i = 0; $i < strlen($txt); $i++) {

$md5 = $txt[$i];

$tmp .= $txt[++$i] ^ $md5;

}

return $tmp;

}

private function passport_key($txt, $encrypt_key)

{

$encrypt_key = md5($encrypt_key);

$ctr = 0;

$tmp = '';

for ($i = 0; $i < strlen($txt); $i++) {

$ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;

$tmp .= $txt[$i] ^ $encrypt_key[$ctr++];

}

return $tmp;

}

}