The natcasesort() function is an inbuilt function in PHP which is used to sort an array by using a “natural order” algorithm. The natural order tells the order to be used as a normal human being would use. That is, it does not check the type of value for comparison. For example, in string representation 30 is less than 7 according to the standard sorting algorithm as 3 comes before 7 lexicographically. But in natural order 30 is greater than 7. Also, the natcasesort() function is case insensitive.
Syntax:
bool natcasesort($array )
Parameters: This function accepts a single parameter $array. It is the array which natcasesort() function is going to sort.
Return Value It returns a boolean value i.e., TRUE on success and FALSE on failure.
Below programs illustrate the natcasesort() function in PHP:
Program 1:
<?php // input array $arr1 = array("Gfg12.jpeg", "gfg10.jpeg", "Gfg2.jpeg", "gfg1.jpeg"); $arr2 = $arr1; // sorting using sort function. sort($arr1); echo "Standard sorting
"; print_r($arr1); // Sorting using natcasesort() function. natcasesort($arr2); echo "Natural order case insensitve: "; print_r($arr2); ?> |
Output:
Standard sorting:
Array
(
[0] => Gfg12.jpeg
[2] => Gfg2.jpeg
[3] => gfg1.jpeg
[1] => gfg10.jpeg
)
Natural order case insensitve:
Array
(
[3] => gfg1.jpeg
[2] => Gfg2.jpeg
[1] => gfg10.jpeg
[0] => Gfg12.jpeg
)
Program 2:
<?php // input array $arr = array("Gfg15.jpeg", "gfg10.jpeg", "Gfg1.jpeg", "gfg22.jpeg", "Gfg2.jpeg"); // Sorting using natcasesort() function. natcasesort($arr); print_r($arr); ?> |
Output:
Array
(
[2] => Gfg1.jpeg
[4] => Gfg2.jpeg
[1] => gfg10.jpeg
[0] => Gfg15.jpeg
[3] => gfg22.jpeg
)
Reference:
http://php.net/manual/en/function.natcasesort.php
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