AES encryption and decryption of php

PHP code, PHP provides many things, you can use functions directly, but PHP currently only knows the filling mode ZeroPadding, so other languages ​​​​can only follow it:

$privateKey = "1234567812345678";
$iv = "1234567812345678";
$data = "Test String";

//Encryption
$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $privateKey, $data, MCRYPT_MODE_CBC, $iv);
echo( $encrypted);
echo '';
echo(base64_encode($encrypted));
echo '';

//Decrypt
$encryptedData = base64_decode("2fbwW9+ 8vPId2/foafZq6Q==");
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $privateKey, $encryptedData, MCRYPT_MODE_CBC, $iv);
echo($decrypted);
?>

Encryption and decryption, php, AES