... PHP 4 >= 4.0.0) natsort -- Sort an array using a "natural order" algorithm . void natsort ( array array) . ... An example of the difference between this algorithm and the regular computer string sorting algorithms (used in sort() ) can be seen below: . Example 1. natsort() example . array1 = $array2 = array ("img12.png", "img10.png", "img2.png", "img1.png"); sort($array1); echo "Standard sorting\n"; print_r($array1); natsort($array2); echo "\nNatural order sorting\n"; print_r($array2); . ...