ArrayObject::natsort Sort entries using a "natural order" algorithm &reftitle.description; public trueArrayObject::natsort This method implements a sort algorithm that orders alphanumeric strings in the way a human being would while maintaining key/value associations. This is described as a "natural ordering". An example of the difference between this algorithm and the regular computer string sorting algorithms (used in ArrayObject::asort) method can be seen in the example below. ¬e.sort-unstable; &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; &return.void; &reftitle.changelog; &Version; &Description; &return.type.true; &reftitle.examples; asort(); echo "Standard sorting\n"; var_dump($arr1); $arr2->natsort(); echo "\nNatural order sorting\n"; var_dump($arr2); ?> ]]> &example.outputs; array(4) { [3]=> string(8) "img1.png" [1]=> string(9) "img10.png" [0]=> string(9) "img12.png" [2]=> string(8) "img2.png" } } Natural order sorting object(ArrayObject)#2 (1) { ["storage":"ArrayObject":private]=> array(4) { [3]=> string(8) "img1.png" [2]=> string(8) "img2.png" [1]=> string(9) "img10.png" [0]=> string(9) "img12.png" } } ]]> For more information see: Martin Pool's Natural Order String Comparison page. &reftitle.seealso; ArrayObject::asort ArrayObject::ksort ArrayObject::natcasesort ArrayObject::uasort ArrayObject::uksort natsort