php encrypt to hex

encrypt

function hex2bin($data) 
{
   return pack("H" . strlen($data), $data); 
}

function encrypt($key, $data)
{
    $iv  =  mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_RAND);
    return bin2hex(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_ECB, $iv));
}

function decrypt($key, $data)
{
    $iv  =  mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_ECB),MCRYPT_RAND);
    return mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, hex2bin($data), MCRYPT_MODE_ECB, $iv);
}