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ksort

Sort an array by key (PHP 4, PHP 5)
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 311. 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().

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

Note:

The second parameter was added in PHP 4.