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natcasesort
(PHP 4, PHP 5, PHP 7)
natcasesort — Sort an array using a case insensitive "natural order" algorithm
Description
natcasesort
( array
&$array
) : boolnatcasesort() is a case insensitive version of natsort().
This function 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".
Note:
If two members compare as equal, their relative order in the sorted array is undefined.
Examples
Example #1 natcasesort() example
<?php
$array1 = $array2 = array('IMG0.png', 'img12.png', 'img10.png', 'img2.png', 'img1.png', 'IMG3.png');
sort($array1);
echo "Standard sorting\n";
print_r($array1);
natcasesort($array2);
echo "\nNatural order sorting (case-insensitive)\n";
print_r($array2);
?>
The above example will output:
Standard sorting
Array
(
[0] => IMG0.png
[1] => IMG3.png
[2] => img1.png
[3] => img10.png
[4] => img12.png
[5] => img2.png
)
Natural order sorting (case-insensitive)
Array
(
[0] => IMG0.png
[4] => img1.png
[3] => img2.png
[5] => IMG3.png
[2] => img10.png
[1] => img12.png
)
For more information see: Martin Pool's » Natural Order String Comparison page.
See Also
- natsort() - Sort an array using a "natural order" algorithm
- The comparison of array sorting functions
- strnatcmp() - String comparisons using a "natural order" algorithm
- strnatcasecmp() - Case insensitive string comparisons using a "natural order" algorithm
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