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<?php $expected = range('91', '101'); $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 ) );
Output for git.master, git.master_jit
array ( 2 => array ( 0 => 100, 1 => 101, 2 => 91, 3 => 92, 4 => 93, 5 => 94, 6 => 95, 7 => 96, 8 => 97, 9 => 98, 10 => 99, ), 5 => array ( 0 => 100, 1 => 101, 2 => 91, 3 => 92, 4 => 93, 5 => 94, 6 => 95, 7 => 96, 8 => 97, 9 => 98, 10 => 99, ), 10 => array ( 0 => 100, 1 => 101, 2 => 91, 3 => 92, 4 => 93, 5 => 94, 6 => 95, 7 => 96, 8 => 97, 9 => 98, 10 => 99, ), 13 => array ( 0 => 100, 1 => 101, 2 => 91, 3 => 92, 4 => 93, 5 => 94, 6 => 95, 7 => 96, 8 => 97, 9 => 98, 10 => 99, ), )

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