(PHP 4 >= 4.0.0)
natsort -- Sort an array using a "natural order" algorithm
Description
void natsort (array array)
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:
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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);
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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
)
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For more information see: Martin Pool's
Natural Order String Comparison page.
See also natcasesort(), strnatcmp(), and
strnatcasecmp().
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