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run code in 300+ PHP versions simultaneously
<?php $array = [2,2,2,1,1,0,0,8]; $values_cache = []; usort($array, function ($a, $b) use (&$values_cache) { $key_a = isset($values_cache[$a]) ? $values_cache[$a] : ($values_cache[$a] = keyfn($a)); $key_b = isset($values_cache[$b]) ? $values_cache[$b] : ($values_cache[$b] = keyfn($b)); return $key_a <=> $key_b; }); echo '<pre>', print_r($array), '</pre>'; // TODO function keyfn($v) { echo 'call a keyfn' . PHP_EOL; return 2 * $v; }
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
call a keyfn call a keyfn call a keyfn call a keyfn <pre>Array ( [0] => 0 [1] => 0 [2] => 1 [3] => 1 [4] => 2 [5] => 2 [6] => 2 [7] => 8 ) 1</pre>
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 call a keyfn call a keyfn call a keyfn call a keyfn <pre>Array ( [0] => 0 [1] => 0 [2] => 1 [3] => 1 [4] => 2 [5] => 2 [6] => 2 [7] => 8 ) 1</pre>
preferences:
145.48 ms | 402 KiB | 166 Q