The arsort() in PHP is used to sort an array according to values. It sorts in a way that relation between indices and values is maintained. By default it sorts in descending order of values.
Syntax:
bool arsort( $array, $sorting_type )
Parameters: This function accepts two parameters as mentioned above and described below:
- $array: This parameter specifies the array which to be sort. It is a mandatory parameter.
- $sorting_type: This parameter specifies name of a user-defined function which will be used to sort the keys of array $array. This comparison function must return an integer.
Return Value: This function returns True on success or False on failure.
Below programs illustrate the arsort() function in PHP.
Program 1:
<?php // PHP program to illustrate // arsort() function     // Input different array elements $arr = array("0" => "neveropen",              "1" => "Practice",              "2" => "Contribute",              "3" => "Java",              "4" => "Videos",              "5" => "Report Bug",              "6" => "Article",              "7" => "Sudo Placement"        );   // Implementation of arsort() arsort($arr);    // for-Loop for displaying result foreach ($arr as $key => $val) {     echo "[$key] = $val";     echo"\n"; }   ?> |
Output:
[4] = Videos [7] = Sudo Placement [5] = Report Bug [1] = Practice [3] = Java [0] = neveropen [2] = Contribute [6] = Article
Program 2:
<?php // PHP program to illustrate // arsort() function      // Input different array elements $arr = array("a" => 11,              "b" => 22,              "d" => 33,              "n" => 44,              "o" => 55,              "p" => 66,              "p" => 77,              "q" => 88,         ); // Implementation of arsort() arsort($arr);     // for-Loop for displaying result foreach ($arr as $key => $val) {     echo "[$key] = $val";     echo"\n"; }   ?> |
Output:
[q] = 88 [p] = 77 [o] = 55 [n] = 44 [d] = 33 [b] = 22 [a] = 11
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Reference: http://php.net/manual/en/function.arsort.php
