ArrayObject::uksort
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
ArrayObject::uksort — Sort the entries by keys using a user-defined comparison function
說明
This function sorts the keys of the entries using a user-supplied comparison function. The key to entry correlations will be maintained.
注意:
如果兩個成員完全相同,那麼它們將保持原來的順序。 在 PHP 8.0.0 之前,它們在排序陣列中的相對順序是未定義的。
返回值
總是返回 true
。
範例
示例 #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";
}
?>
以上例程會輸出:
an apple: 3 a banana: 4 the Earth: 2 John: 1
參見
- 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
- uksort() - 使用使用者自定義的比較函式對陣列中的鍵名進行排序