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The krsort Function

The krsort function sorts an array by keys in descending order. The function modifies the array itself.

Syntax

krsort(array &$array, int $flags = SORT_REGULAR): bool

Let's sort an array by keys in descending order:

<?php
	$arr = [
		'b' => 1,
		'e' => 3,
		'c' => 2,
		'a' => 5,
		'd' => 4,
	];
	
	krsort($arr);
	var_dump($arr);
?>

Code execution result:

[
	'd' => 4,
	'e' => 3,
	'c' => 2,
	'b' => 1,
	'a' => 5,
]

the sort function,
which sorts by elements in ascending order
the rsort function,
which sorts by elements in descending order
the ksort function,
which sorts by keys in ascending order
the asort function,
which sorts by elements in ascending order while preserving keys
the arsort function,
which sorts by elements in descending order while preserving keys
the natsort function,
which sorts using a natural order algorithm
the natcasesort function,
which sorts using a case-insensitive natural order algorithm
the usort function,
which sorts using a user-defined comparison function
the uksort function,
which sorts by keys using a user-defined comparison function
the uasort function,
which sorts using a user-defined comparison function and maintains index association
the array_multisort function,
which sorts multiple arrays

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