PHP natcasesort() Function

PHP Array Reference

Definition and Usage

The natcasesort() function sorts an array using a "natural order" algorithm. The difference between the natcasesort() function and the natsort() function is that this function is case-insensitive.

This function returns TRUE on success, or FALSE on failure.

Syntax

natcasesort(array)

Parameter Values

Technical Details

More Examples

Example 1:

Sort the elements of the $files array naturally and case-insensitively:

<?php
$files = array("txt12.txt", "Txt10.txt", "txt2.txt", "txt20.txt");
natcasesort($files);
print_r($files);
?>

Output:

Array
(
     => txt12.txt
     => txt2.txt
     => txt20.txt
     => Txt10.txt
)

Example 2

Demonstrate the difference between natsort() and natcasesort():

<?php
$array1 = $array2 = array("img12.png", "img10.png", "img2.png", "img1.png");

natcasesort($array1);
echo "Case-insensitive natural sorting: ";
print_r($array1);

natsort($array2);
echo "Case-sensitive natural sorting: ";
print_r($array2);
?>

Output:

Case-insensitive natural sorting: Array
(
     => img1.png
     => img2.png
     => img10.png
     => img12.png
)
Case-sensitive natural sorting: Array
(
     => img1.png
     => img2.png
     => img10.png
     => img12.png
)