PHP: natcasesort() function

Last update on August 19 2022 21:50:40 (UTC/GMT +8 hours)

PHP: Sort an array using a case insensitive natural order algorithm

The natcasesort() function is used to sort an array using a case insensitive "natural array" algorithm. The function implements a sort algorithm but maintains original keys/values.

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

Version:

(PHP 4 and above)

Syntax:

natcasesort(array_name)

Parameter:

Name	Description	Required / Optional	Type
array_name	The input array.	Required	Array

Return value:

TRUE on success or FALSE on failure.

Value Type: Boolean.

Example:

<?php
$php_files = array("code12.php", "Code22.txt",
"code2.php", "code3.php", "Code1.php");
sort($php_files);
echo "List of file using standard sorting: ";
print_r($php_files);
echo "<br />";
natcasesort($php_files);
echo "List of file using natural order: ";
print_r($php_files);
?>

Output:

List of file using standard sorting: Array ( [0] => Code1.php [1] => Code22.txt [2] => code12.php [3] => code2.php [4] => code3.php ) 

List of file using natural order: Array ( [0] => Code1.php [1] => Code22.txt [3] => code2.php [4] => code3.php [2] => code12.php )

View the example in the browser

Practice here online :

See also

PHP Function Reference

Previous: list
Next: natsort

PHP: Tips of the Day

Filters the collection using the given callback

Example:

<?php
function tips_reject($items, $func)
{
  return array_values(array_diff($items, array_filter($items, $func)));
}

print_r(tips_reject(['Apple', 'Pear', 'Kiwi', 'Banana'], function ($item) {
  return strlen($item) > 4;
}));
?>

Output:

Array
(
    [0] => Pear
    [1] => Kiwi
)