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natcasesort

Sort an array using a case insensitive "natural order" algorithm (PHP 4, PHP 5)
bool natcasesort ( array &array )

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".

Returns TRUE on success or FALSE on failure.

natcasesort() is a case insensitive version of natsort().

Example 315. 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 sort(), natsort(), strnatcmp(), and strnatcasecmp().