3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = []; $a['R3']['C3'] = 66; $a['R1']['C1'] = 123; $a['R2']['C2'] = 423523; $a['R1']['C2'] = 3; arsort($a); print_r ($a);
Output for 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
Array ( [R1] => Array ( [C1] => 123 [C2] => 3 ) [R3] => Array ( [C3] => 66 ) [R2] => Array ( [C2] => 423523 ) )
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Array ( [R1] => Array ( [C1] => 123 [C2] => 3 ) [R2] => Array ( [C2] => 423523 ) [R3] => Array ( [C3] => 66 ) )
preferences:
248.78 ms | 406 KiB | 377 Q