3v4l.org

run code in 300+ PHP versions simultaneously
<?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);

preferences:
50.1 ms | 402 KiB | 5 Q