3v4l.org

run code in 300+ PHP versions simultaneously
<?php $commands = array("mark", "ignore", "pick", "random"); $attempts = array("mark", "ignore", "pick", "random", "bonk"); foreach($attempts as $attempt){ echo "$attempt => "; $index=array_search($attempt,$commands); if($index===false || !isset($commands[++$index])){ // not found or found last element $index=0; // use first element } echo $commands[$index],"\n"; }
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
mark => ignore ignore => pick pick => random random => mark bonk => mark

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97.86 ms | 1405 KiB | 4 Q