- var_dump: documentation ( source)
- serialize: documentation ( source)
- base64_encode: documentation ( source)
- json_encode: documentation ( source)
- escapeshellarg: documentation ( source)
- strtolower: documentation ( source)
<?php
$str = 'holger@hütig.de';
$d = array($str);
$json = json_encode($d);
$serialized = serialize($json);
$b64 = base64_encode($serialized);
$escaped = escapeshellarg($b64);
var_dump($str, strtolower($str));