The 5th Annual China PHP Conference


(PHP 5 >= 5.2.0, PHP 7)

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


public void ArrayObject::uksort ( callable $cmp_function )

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



The callback comparison function.

Function cmp_function 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.

Dönen Değerler

Hiçbir değer dönmez.


Örnek 1 ArrayObject::uksort() example

function cmp($a$b) {
$a preg_replace('@^(a|an|the) @'''$a);
$b preg_replace('@^(a|an|the) @'''$b);

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

foreach (
$arrayObject as $key => $value) {

Yukarıdaki örneğin çıktısı:

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

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