PHP krsort() Function
Last Updated :
20 Jun, 2023
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
$arr = array ( "0" => "Technology" ,
"1" => "Machine" ,
"2" => "GeeksforGeeks" ,
"3" => "Graphics" ,
"4" => "Videos" ,
"5" => "Report" ,
"6" => "Article" ,
"7" => "Placement" ,
"8" => "Contribute" ,
"9" => "Reset" ,
"10" => "Copy" ,
);
krsort( $arr );
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
$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,
);
krsort( $arr );
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
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