3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo[1]['items'][] = 'Third'; $foo[0]['items'][] = 'Second'; $foo[4]['items'][] = 'Last'; $foo[-1]['items'][] = 'I will be first'; $foo[0]['items'][] = 'Also second'; asort($foo); echo '<pre>'; var_dump($foo); echo '</pre>';

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