PHP natcasesort() Function

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Definition and Usage

The natcasesort() function sorts an array by using a "natural order" algorithm. The values keep their original keys.

In a natural algorithm, the number 2 is less than the number 10. In computer sorting, 10 is less than 2, because the first number in "10" is less than 2.

This function is case-insensitive.

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

Syntax

natcasesort(array)

Parameter Description
array Required. Specifies the array to sort

Example

<?php
$temp_files = array("temp15.txt","Temp10.txt",
"temp1.txt","Temp22.txt","temp2.txt");

natsort($temp_files);
echo "Natural order: ";
print_r($temp_files);
echo "<br />";

natcasesort($temp_files);
echo "Natural order case insensitve: ";
print_r($temp_files);
?>

The output of the code above will be:

Natural order:
Array
(
[0] => Temp10.txt
[1] => Temp22.txt
[2] => temp1.txt
[4] => temp2.txt
[3] => temp15.txt
)
Natural order case insensitve:
Array
(
[2] => temp1.txt
[4] => temp2.txt
[0] => Temp10.txt
[3] => temp15.txt
[1] => Temp22.txt
)

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