PHP | ArrayIterator natsort() Function

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The ArrayIterator::natsort() function is an inbuilt function in PHP which is used to sort an array naturally.

Syntax:

void ArrayIterator::natsort( void )

Parameters: This function does not accept any parameters.

Return Value: This function does not return any value.

Below programs illustrate the ArrayIterator::natsort() function in PHP:

Program 1:

<?php 
    
// Declare an ArrayIterator 
$arrItr = new ArrayIterator( 
    array( 
        5 => 'G', 
        4 => 'e', 
        3 => 'E', 
        2 => 'k', 
        1 => 'S',  
    ) 
); 
    
// Sort the array key 
$arrItr->natsort(); 
   
// Display the element 
while($arrItr->valid()) { 
    echo $arrItr->current() . " "; 
    $arrItr->next(); 
} 
    
?> 

Output:

E G S e k

Program 2:

<?php 
   
// Declare an ArrayIterator 
$arrItr = new ArrayIterator( 
    array("zambiatek", "GEEKS", "Geeks", "gEEKS") 
); 
  
// Sort the array with case sensitive 
$arrItr->natsort(); 
  
var_dump($arrItr); 
  
?> 

Output:

object(ArrayIterator)#1 (1) {
  ["storage":"ArrayIterator":private]=>
  array(4) {
    [1]=>
    string(5) "GEEKS"
    [2]=>
    string(5) "Geeks"
    [3]=>
    string(5) "gEEKS"
    [0]=>
    string(5) "zambiatek"
  }
}

Reference: https://www.php.net/manual/en/arrayiterator.natsort.php