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# ksort

(PHP 3 <= 3.0.18, PHP 4 >= 4.0.0)

ksort -- Sort an array by key

## Description

``int ksort` (array array [, int sort_flags])`

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

Example 1. ksort() example
    $fruits = array ("d"=>"lemon", "a"=>"orange", "b"=>"banana", "c"=>"apple");
    ksort ($fruits);
    reset ($fruits);
    while (list ($key, $val) = each ($fruits)) {
        echo "$key = $val\n";
    }

This example would display:

    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(), sort(), natsort(), and rsort().

> Note: The second parameter was added in PHP 4.

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