Rijndael 256 bit encryption using mcrypt

<?
// Encrypt Function
function mc_encrypt($encrypt, $mc_key) {
	$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
	$passcrypt = trim(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $mc_key, trim($encrypt), MCRYPT_MODE_ECB, $iv));
	$encode = base64_encode($passcrypt);
	return $encode;
}

// Decrypt Function
function mc_decrypt($decrypt, $mc_key) {
	$decoded = base64_decode($decrypt);
	$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND);
	$decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $mc_key, trim($decoded), MCRYPT_MODE_ECB, $iv));
	return $decrypted;
}
?>