3v4l.org

run code in 300+ PHP versions simultaneously
<?php $users = json_decode('[{"first_name":"Rebecca"},{"first_name":"amy"},{"first_name":"Amy"},{"first_name":"stacy"}]', true); $firstNames = array_column($users, 'first_name'); array_multisort(array_map('strtolower', $firstNames), $firstNames, $users); var_export($users);
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', ), )
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60.98 ms | 407 KiB | 5 Q