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:
php
php
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.
<?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:
Program 2:
[10] = Copy [9] = Reset [8] = Contribute [7] = Placement [6] = Article [5] = Report [4] = Videos [3] = Graphics [2] = GeeksforGeeks [1] = Machine [0] = Technology
<?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:
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Reference: http://php.net/manual/en/function.krsort.php
[z] = 1 [u] = 1000 [t] = 3 [s] = 2 [r] = 77 [q] = -11 [p] = 66 [o] = 55 [n] = 44 [d] = 33 [b] = 22 [a] = 11
