Online PHP editor | output for RYTt9

@ 2015-03-02T14:34:28Z

<?php

$array = array(
    array(
        'file' => 'file1',
        'line' => 1,
        'message' => 'foo'
    ),
    array(
        'file' => 'file1',
        'line' => 1,
        'message' => 'bar'
    )
);

usort($array, function($a, $b) {
        if ($a['file'] !== $b['file'])
        {
            return strcmp($a['file'], $b['file']);
        }
        else if ($a['line'] === $b['line'])
        {
            return 0;
        }
        else
        {
            return ($a['line'] < $b['line'] ? -1 : 1);
        }
    }
);

var_dump($array);

Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 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 - 8.3.6: array(2) { [0]=> array(3) { ["file"]=> string(5) "file1" ["line"]=> int(1) ["message"]=> string(3) "foo" } [1]=> array(3) { ["file"]=> string(5) "file1" ["line"]=> int(1) ["message"]=> string(3) "bar" } }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40: array(2) { [0]=> array(3) { ["file"]=> string(5) "file1" ["line"]=> int(1) ["message"]=> string(3) "bar" } [1]=> array(3) { ["file"]=> string(5) "file1" ["line"]=> int(1) ["message"]=> string(3) "foo" } }

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