- var_dump: documentation ( source)
- fputcsv: documentation ( source)
- fopen: documentation ( source)
<?php
$output = fopen('php://output', 'w');
fputcsv($output, ['a:3:{s:4:""type"";i:3;s:8:""platform"";s:10:""flirchi.ru"";s:13:""channel_login"";s:10:""flirchi.ru"";}']);
var_dump($output);