Openssl encrypt ve decrypt kullanirdim.
<?php
$data = "Scaler Topics";
$method = "AES-256-CBC";
$key = "encryptionKey123";
$options = 0;
$iv = '1234567891011121';

$encryptedData = openssl_encrypt($data, $method, $key, $options,$iv);

echo "Data: ". $data. "n";
echo "Encrypted Data: ". $encryptedData;
//-----------------------decrypt.
$encryptedData = "g0U5Y7oCJGiznDr2k+W9EQ==";
$method = "AES-256-CBC";
$key = "encryptionKey123";
$options = 0;
$iv = '1234567891011121';

$decryptedData = openssl_decrypt($encryptedData, $method, $key, $options, $iv);

echo "Encrypted Data: ". $encryptedData. "n";
echo "Decrypted Data: ". $decryptedData;
?>