3v4l.org

run code in 300+ PHP versions simultaneously
<?php $expected = range('a', 'l'); $array = array_fill(0, 100, $expected); array_walk($array, 'sort'); var_export( array_filter( $array, fn($row) => $row !== $expected // only keep rows which are sorted incorrectly ) );

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31.61 ms | 408 KiB | 5 Q