encryption and decryption in php example

$decoded = base64_decode($encoded);

<?php
$encrypted_text = "qnHWqq1mElDqW2RCepH14VriPf5s2Q==";
$cipher = "AES-128-CTR";
$key = "Blog Desire";
$iv = "1232434565432123";
$original_text = openssl_decrypt ($encrypted_text, $cipher, $key, $options = 0, $iv);
echo $original_text;