This function implements a sort algorithm that orders
alphanumeric strings in the way a human being would. This is
described as a "natural ordering". An example of the
difference between this algorithm and the regular computer
string sorting algorithms (used in sort()) can
be seen below:
The code above will generate the following output:
Standard sorting Array ( [0] = img1.png [1] = img10.png [2] = img12.png [3] = img2.png ) Natural order sorting Array ( [3] = img1.png [2] = img2.png [1] = img10.png [0] = img12.png ) |
注: If you're wanting to maintain index/value associations, consider using usort($arr, 'strnatcmp').
See also natcasesort(),
strnatcmp(), and
strnatcasecmp().