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(PHP 3, PHP 4, PHP 5)

ksort -- Sort an array by key

Description

bool ksort ( array &array [, int sort_flags] )

Sorts an array by key, maintaining key to data correlations. This is useful mainly for associative arrays.

Returns TRUE on success or FALSE on failure.

Example 1. ksort() example

<?php
$fruits = array("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple");
ksort($fruits);
foreach ($fruits as $key => $val) {
    echo "$key = $val\n";
}
?>

The above example will output:

a = orange
b = banana
c = apple
d = lemon

You may modify the behavior of the sort using the optional parameter sort_flags , for details see sort() .

Related Function(s)

sort()

asort()

arsort()

krsort()

uksort()

natsort()

rsort()