3v4l.org

run code in 300+ PHP versions simultaneously
<?php $data = [27, 38, 58, 82]; usort( $data, function ($a, $b) { echo "Comparing $a - $b", PHP_EOL; echo 'Element A should go ', (($a - $b < 0) ? 'before' : 'after'), ' element B'; return $a - $b; } );
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 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
Comparing 27 - 38 Element A should go before element BComparing 38 - 58 Element A should go before element BComparing 58 - 82 Element A should go before element B
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Comparing 38 - 27 Element A should go after element BComparing 38 - 58 Element A should go before element BComparing 82 - 38 Element A should go after element BComparing 58 - 38 Element A should go after element BComparing 82 - 58 Element A should go after element B
preferences:
159.96 ms | 402 KiB | 182 Q