3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = array(1, 5, 2.5); $arr = array(); foreach ($str as $s) { $arr[$s][1]['a'] = $s; } echo '<pre>'; var_dump($arr); echo '</pre>'; ksort($arr); echo '<pre>'; var_dump($arr); echo '</pre>';

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48.02 ms | 402 KiB | 5 Q