PHP krsort() Function
Last Updated :
20 Jun, 2023
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The krsort() function is an inbuilt function in PHP which is used to sort an array by key in reverse order according to its index values. It sorts in a way that relation between indices and values is maintained.
Syntax:
bool krsort( $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 is an optional parameter. There are different sorting types which are discussed below:
- SORT_REGULAR: The value of $sorting_type is SORT_REGULAR then items are compare normally.
- SORT_NUMERIC: The value of $sorting_type is SORT_NUMERIC then items are compares numerically.
- SORT_STRING: The value of $sorting_type is SORT_STRING then items are compares as string.
- SORT_LOCALE_STRING: The value of $sorting_type is SORT_STRING then items are compares as string, based on current locale.
Return Value: This function returns True on success or False on failure.
Below programs illustrate the krsort() function in PHP.
Program 1:
<?php // PHP program to illustrate // krsort()function // Input different array elements $arr = array("0" =>"Technology", "1" =>"Machine", "2" =>"GeeksforGeeks", "3" =>"Graphics", "4" =>"Videos", "5" =>"Report", "6" =>"Article", "7" =>"Placement", "8" =>"Contribute", "9" =>"Reset", "10" =>"Copy", ); // Implementation of krsort() krsort($arr); // for-Loop for displaying result foreach ($arr as $key => $val) { echo "[$key] = $val"; echo"\n"; } ?> |
Output:
[10] = Copy [9] = Reset [8] = Contribute [7] = Placement [6] = Article [5] = Report [4] = Videos [3] = Graphics [2] = GeeksforGeeks [1] = Machine [0] = Technology
Program 2:
<?php // PHP program to illustrate // krsort function // Input different array elements $arr = array("a" => 11, "b" => 22, "d" => 33, "n" => 44, "o" => 55, "p" => 66, "r" => 77, "s" => 2, "q" => -11, "t" => 3, "u" => 1000, "z" => 1, ); // Implementation of krsort krsort($arr); // for-Loop for displaying result foreach ($arr as $key => $val) { echo "[$key] = $val"; echo"\n"; } ?> |
Output:
[z] = 1 [u] = 1000 [t] = 3 [s] = 2 [r] = 77 [q] = -11 [p] = 66 [o] = 55 [n] = 44 [d] = 33 [b] = 22 [a] = 11
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Reference: http://php.net/manual/en/function.krsort.php
