3v4l.org

run code in 300+ PHP versions simultaneously
<?php $expected = [ 'foo1', 'foo2', 'foo3', 'foo4', 'foo5', 'foo6', 'foo7', 'foo8', 'foo9', 'foo10', 'foo11', ]; $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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