3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = json_decode('[{"first_name":"Rebecca"},{"first_name":"amy"},{"first_name":"Amy"},{"first_name":"stacy"}]', true); usort( $data, fn($a, $b) => strcasecmp($a['first_name'], $b['first_name']) ?: strcmp($a['first_name'], $b['first_name']) ); var_export($data);
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array ( 0 => array ( 'first_name' => 'Amy', ), 1 => array ( 'first_name' => 'amy', ), 2 => array ( 'first_name' => 'Rebecca', ), 3 => array ( 'first_name' => 'stacy', ), )
preferences:
67.87 ms | 407 KiB | 5 Q