3v4l.org

run code in 300+ PHP versions simultaneously
<?php $wyniki = []; $wyniki["w1"] = 100; $wyniki["w2"] = 300; $wyniki["w3"] = 50; $wyniki["w4"] = 800; print_r($wyniki); arsort($wyniki); echo PHP_EOL; print_r( $wyniki ); echo PHP_EOL; echo printf("klucz %s", key($wyniki) );
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 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 ( [w1] => 100 [w2] => 300 [w3] => 50 [w4] => 800 ) Array ( [w4] => 800 [w2] => 300 [w1] => 100 [w3] => 50 ) klucz w48
preferences:
234.63 ms | 404 KiB | 338 Q