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ArrayObject::uksort

PHP function Edit on GitHub ✎

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

Sort the entries by keys using a user-defined comparison function

Description

ArrayObject::uksort(callable $callback): true

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

Sort-unstable

Parameters

callback: Description

Return Values

Always

Changelog

Version	Description

Examples

ArrayObject::uksort() example

php

<?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";
}
?>

The above example will output:

output

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