PHP - uksort

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Metóda - uksort

(PHP 4, PHP 5, PHP 7)

The function is used to sort an array by keys using a comparison function defined by the user.

Procedurálne

• function uksort (array &$array, callable $key_compare_func) : bool
• function callback () : array

Parametre

Názov	Dátový typ	Predvolená hodnota	Popis
&$array	array		The array we want to sort.
$key_compare_func	callable		Specifies a callable comparison function. The function must return a negative integer if the first argument of the function is less than the second argument, a positive integer if it's greater or zero if they're equal.

Mávratovej hodnoty

Vracia: bool

Returns true on success, returns false otherwise.

Príklady

In the example we sort an array by its keys. The function compares the names of the keys.

// The array we want to sort:
$myArray = array("Delta" => 1, "Beta" => "100", "Epsilon" => "15.15", "Alpha" => 10, "Gamma" => 0);
// A comparison function:
function compare_key_names($key1, $key2) {
    if($key1 == $key2) {
        return 0;
    } else {
        return ($key1 < $key2) ? -1 : 1;
    }
}
// Sorting the array according to our comparison function:
uksort($myArray, "compare_key_names");
foreach ($myArray as $key=>$value) {
    echo "Key: $key, value: $value";
    echo "<br>";
}