Online PHP editor | refs for r9pYv

<?php $textToEncrypt = "Secret Text to Encrypt"; $encryptionMethod = 'aes-256-cbc'; $secretHash = "315a5504d921f8327f73a356d2bbcbf1"; // <---- you have to use some persistent. $iv_size = openssl_cipher_iv_length($encryptionMethod ); $iv = openssl_random_pseudo_bytes($iv_size); //To encrypt $encryptedMessage = openssl_encrypt($textToEncrypt, $encryptionMethod, $secretHash, 0, $iv); //Concatenate iv with data $encryptedMessageWithIv = bin2hex($iv) . $encryptedMessage; //To Decrypt $iv_size = openssl_cipher_iv_length($encryptionMethod ); $iv = hex2bin(substr($encryptedMessageWithIv, 0, $iv_size*2)); $decryptedMessage = openssl_decrypt(substr($encryptedMessageWithIv, $iv_size*2), $encryptionMethod, $secretHash, 0, $iv); echo "Encrypted: $encryptedMessageWithIv <br>Decrypted: $decryptedMessage";