3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array('order_source' => array('google','facebook'), 'order_medium' => 'google-text'); function bqs($array, $qs='',$index = false) { foreach($array as $par => $val) { if($index) $par = $index; if(is_array($val)) { $qs .= bqs($val, $qs,$par); } else { $qs .= $par.'='.$val.'&'; } } return $qs; } echo $qss = bqs($arr);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
order_source=google&order_source=facebook&order_medium=google-text&
preferences:
323.99 ms | 406 KiB | 459 Q