ArrayObject::uksort
(PHP 5 >= 5.2.0, PHP 7)
ArrayObject::uksort — Sort the entries by keys using a user-defined comparison function
Descrierea
This function sorts the keys of the entries using a user-supplied comparison function. The key to entry correlations will be maintained.
Parametri
-
cmp_function -
The callback comparison function.
Function
cmp_functionshould 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.
Valorile întoarse
Nu este întoarsă nici o valoare.
Exemple
Example #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";
}
?>
Exemplul de mai sus va afișa:
an apple: 3 a banana: 4 the Earth: 2 John: 1
A se vedea și
- ArrayObject::asort() - Sort the entries by value
- ArrayObject::ksort() - Sort the entries by key
- ArrayObject::natsort() - Sort entries using a "natural order" algorithm
- ArrayObject::natcasesort() - Sort an array using a case insensitive "natural order" algorithm
- ArrayObject::uasort() - Sort the entries with a user-defined comparison function and maintain key association
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