PHP如何实现AES加密解密算法

function ecryptdString($str,$keys="6461772803150152",$iv="8105547186756005",$cipher_alg=MCRYPT_RIJNDAEL_128){ $encrypted_string=bin2hex(mcrypt_encrypt($cipher_alg, $keys, $str, MCRYPT_MODE_CBC,$iv)); return $encrypted_string; } function decryptStrin($str,$keys="6461772803150152",$iv="8105547186756005",$cipher_alg=MCRYPT_RIJNDAEL_128){ $decrypted_string=mcrypt_decrypt($cipher_alg, $keys, pack("H*",$str),MCRYPT_MODE_CBC, $iv); return $decrypted_string; }