- parse_str: documentation ( source)
- print_r: documentation ( source)
<?php
$str = "form_key=kcE3W2vzParNhPN5&options%5B1508%5D=2025&options%5B1509%5D=1234&options%5B1510%5D=5678&options%5B1511%5D=&options%5B1512%5D=&options%5B1513%5D=&productId=59891";
$output = array();
parse_str($str, $output);
print_r($output);