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 PHP manuál : function.natcasesort.html

natcasesort
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natcasesort

(PHP 4, PHP 5)

natcasesort --  Sort an array using a case insensitive "natural order" algorithm

Description

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

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