PHP 8.1.0 RC 2 available for testing

ArrayObject::uksort

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

ArrayObject::uksortSort the entries by keys using a user-defined comparison function

Beschreibung

public ArrayObject::uksort(callable $callback): bool

This function sorts the keys of the entries using a user-supplied comparison function. The key to entry correlations will be maintained.

Parameter-Liste

callback

The callback comparison function.

Function callback should accept two parameters which will be filled by pairs of entry keys. The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

R├╝ckgabewerte

Es wird kein Wert zur├╝ckgegeben.

Beispiele

Beispiel #1 ArrayObject::uksort() example

<?php
function cmp($a$b) {
    
$a preg_replace('@^(a|an|the) @'''$a);
    
$b preg_replace('@^(a|an|the) @'''$b);
    return 
strcasecmp($a$b);
}

$array = array("John" => 1"the Earth" => 2"an apple" => 3"a banana" => 4);
$arrayObject = new ArrayObject($array);
$arrayObject->uksort('cmp');

foreach (
$arrayObject as $key => $value) {
    echo 
"$key$value\n";
}
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

an apple: 3
a banana: 4
the Earth: 2
John: 1

Siehe auch

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