php - Fail to encrypt/decrypt -


i have been using code encrypt/decrypt couple of years. doesn't seem work.

sample code, simplify:

url: http://hirisemarketing.com/edit/v1n3smkocm0i12ookbpfzq==11

$key = "mysecretkay"; $aaa = encrypt($key, "asdfg"); echo $aaa; echo "========="; echo $key; echo "========="; echo decrypt($key, $aaa); exit;   define('iv_size', mcrypt_get_iv_size(mcrypt_rijndael_128, mcrypt_mode_cbc));  function encrypt ($key, $payload) {   $iv = mcrypt_create_iv(iv_size, mcrypt_dev_urandom);   $crypt = mcrypt_encrypt(mcrypt_rijndael_128, $key, $payload, mcrypt_mode_cbc, $iv);   $combo = $iv . $crypt;   $garble = base64_encode($iv . $crypt);   return $garble; }  function decrypt ($key, $garble) {   $combo = base64_decode($garble);   $iv = substr($combo, 0, iv_size);   $crypt = substr($combo, iv_size, strlen($combo));   $payload = mcrypt_decrypt(mcrypt_rijndael_128, $key, $crypt, mcrypt_mode_cbc, $iv);   return $payload; }

firstly, decrypt() function doesn't seem return whenever refresh page. encrypt() function displays different encrypted string strange, guess should same every time provided string "asdfg". please help!


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