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(PHP 4, PHP 5)

ksort — Sort an array by key


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

= array("d"=>"lemon""a"=>"orange""b"=>"banana""c"=>"apple");
foreach (
$fruits as $key => $val) {
"$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().

See also asort(), arsort(), krsort(), uksort(), sort(), natsort(), and rsort().

Note: The second parameter was added in PHP 4.