~~~ //可逆加密 function encrypt($data, $key) { $prep_code = serialize($data); $block = mcrypt_get_block_size('des', 'ecb'); if (($pad = $block - (strlen($prep_code) % $block)) < $block) { $prep_code .= str_repeat(chr($pad), $pad); } $encrypt = mcrypt_encrypt(MCRYPT_DES, $key, $prep_code, MCRYPT_MODE_ECB); return base64_encode($encrypt); } //可逆解密 function decrypt($str, $key) { $str = base64_decode($str); $str = mcrypt_decrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB); $block = mcrypt_get_block_size('des', 'ecb'); $pad = ord($str[($len = strlen($str)) - 1]); if ($pad && $pad < $block && preg_match('/' . chr($pad) . '{' . $pad . '}$/', $str)) { $str = substr($str, 0, strlen($str) - $pad); } return unserialize($str); } 例: //加密 public function encryption(){ $a = 'bac'; $b = encrypt($a,'2568kihy'); dump($b); } //解密 public function decode(){ $a = 'bac'; $b = decrypt($a,'2568kihy'); dump($b); } ~~~