今天在项目中涉及到cookie内容的加密，看了老半天，发现php中有个mcrypt合适我的要求。下面附上一段代码
//encrypt/decrypt
function crypt_text($str,$key,$method = “encrypt”) {
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
if ($method == “encrypt”) {
$text = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $str, MCRYPT_MODE_ECB, $iv);
} else {
$text
