3v4l.org

run code in 500+ PHP versions simultaneously
<?php $messages = [ "a" => "use this ", "b" => "@ - ", "c" => "Don't" ]; rsort ($messages); foreach( $messages as $key => $message){ echo "{$key} - {$message} \n"; } echo PHP_EOL;
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
0 - use this 1 - Don't 2 - @ -

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105.43 ms | 2096 KiB | 4 Q