PHP natsort() Function (original) (raw)

Last Updated : 20 Jun, 2023

The natsort() 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.Syntax:

bool natsort(array)

Parameters: This function accepts a single parameter $array. It is the array which natsort() 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 natsort() function in PHP:Program 1:

PHP `

arr2=arr2 = arr2=arr1; // sorting using sort function. sort($arr1); // printing sorted element. echo "Standard sorting\n"; print_r($arr1); // sorting using natsort() function. natsort($arr2); // printing sorted element. echo "\nNatural order sorting\n"; print_r($arr2); ?>

`

Output:

Standard sorting Array ( [3] => 1.jpeg [1] => 10.jpeg [0] => 12.jpeg [2] => 2.jpeg )

Natural order sorting Array ( [3] => 1.jpeg [2] => 2.jpeg [1] => 10.jpeg [0] => 12.jpeg )

Program 2:

PHP `

`

Output:

Natural order sorting Array ( [2] => gfg1.jpeg [4] => gfg2.jpeg [1] => gfg10.jpeg [0] => gfg15.jpeg [3] => gfg22.jpeg )

Reference: http://php.net/manual/en/function.natsort.php