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<?php # sort callback, push NULLs to end function sorter($a, $b) { if ($a === NULL) { if ($b === NULL) return 0; return 1; } if ($b === NULL) { if ($b === NULL) return 0; return 1; } if ($a === $b) return 0; return ($a < $b) ? -1:1; } $a = range(0, 10); $a[4] = $a[7] = NULL; uasort($a, 'sorter'); var_dump($a);
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