Encrypt Decrypt using PHP (Openssl)

encrypt-decrypt.php

<?php

//replace it with your own key

$key = 'TVpI8MlRPQcUH0mOyrKKrJgnIcVM9kXb8Ke6XZkJXW7WyHYbUDMYdNMWgq9e';

$encrypted_str =  encrypt_string('John Doe is Here');

$decrypted_str = decrypt_string($encrypted_str);



echo "<pre> Encrypted String: ".$encrypted_str."</pre>";
echo "<pre> Decrypted String: ".$decrypted_str."</pre>";


function encrypt_string($str){

		global $key;


		$ivlen = openssl_cipher_iv_length($cipher="AES-128-CBC");
		$iv = openssl_random_pseudo_bytes($ivlen);
		$ciphertext_raw = openssl_encrypt($str, $cipher, $key, $options=OPENSSL_RAW_DATA, $iv);

		return base64_encode( $iv.$ciphertext_raw );

}


function decrypt_string($str){

		global $key;
		 
		$c = base64_decode($str);
		$ivlen = openssl_cipher_iv_length($cipher="AES-128-CBC");
		$iv = substr($c, 0, $ivlen);
		$ciphertext_raw = substr($c, $ivlen);
		return openssl_decrypt($ciphertext_raw, $cipher, $key, $options=OPENSSL_RAW_DATA, $iv);

	}