Online PHP editor | output for eIMMY

<?php function encrypt($string) { $output = false; $encrypt_method = "AES-256-CBC"; $secret_key = 'ExampleKey'; $secret_iv = 'ExampleIv'; // hash $key = hash('sha256', $secret_key); $iv = substr(hash('sha256', $secret_iv), 0, 16); $output = openssl_encrypt($string, $encrypt_method, $key, 0, $iv); $output = base64_encode($output); return $output; } echo encrypt("01234567890123").PHP_EOL; echo encrypt("012345678901234").PHP_EOL; echo encrypt("0123456789012345").PHP_EOL; echo encrypt("01234567890123456").PHP_EOL;