php实现的aes加密类，代码中有使用方法。

<?php//php aes加密类class AESMcrypt {public $iv = null;public $key = null;public $bit = 128;PRivate $cipher;public function __construct($bit, $key, $iv, $mode) {if(empty($bit) || empty($key) || empty($iv) || empty($mode))return NULL;$this->bit = $bit;$this->key = $key;$this->iv = $iv;$this->mode = $mode;switch($this->bit) {case 192:$this->cipher = MCRYPT_RIJNDAEL_192; break;case 256:$this->cipher = MCRYPT_RIJNDAEL_256; break;default: $this->cipher = MCRYPT_RIJNDAEL_128;} // www.jbxue.comswitch($this->mode) {case 'ecb':$this->mode = MCRYPT_MODE_ECB; break;case 'cfb':$this->mode = MCRYPT_MODE_CFB; break;case 'ofb':$this->mode = MCRYPT_MODE_OFB; break;case 'nofb':$this->mode = MCRYPT_MODE_NOFB; break;default: $this->mode = MCRYPT_MODE_CBC;}}public function encrypt($data) {$data = base64_encode(mcrypt_encrypt( $this->cipher, $this->key, $data, $this->mode, $this->iv));return $data;}public function decrypt($data) {$data = mcrypt_decrypt( $this->cipher, $this->key, base64_decode($data), $this->mode, $this->iv);$data = rtrim(rtrim($data), "\x00..\x1F");return $data;}}//使用方法$aes = new AESMcrypt($bit = 128, $key = 'abcdef1234567890', $iv = '0987654321fedcba', $mode = 'cbc');$c = $aes->encrypt('haowei.me');var_dump($aes->decrypt($c));