natcasesort Sort an array using a case insensitive "natural order" algorithm voidnatcasesort arrayarray This function implements a sort algorithm that orders alphanumeric strings in the way a human being would. This is described as a "natural ordering". natcasesort is a case insensitive version of natsort. See natsort for an example of the difference between this algorithm and the regular computer string sorting algorithms. For more information see: Martin Pool's Natural Order String Comparison page. See also sort, natsort, strnatcmp, and strnatcasecmp.