ArrayObject::ksort()

(PHP 5 >= 5.2.0, PHP 7)

Sort the entries by key

说明

publicArrayObject::ksort(void): void

Sorts the entries by key, maintaining key to entry correlations. This is useful mainly for associative arrays.

参数

此函数没有参数。

返回值

没有返回值。

范例

ArrayObject::ksort() example

<?php
$fruits = array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
$fruitArrayObject = new ArrayObject($fruits);
$fruitArrayObject->ksort();
foreach ($fruitArrayObject as $key => $val) {
    echo "$key = $val\n";
}
 ?>

以上例程会输出：

a = orange
b = banana
c = apple
d = lemon

参见

• ArrayObject::asort() Sort the entries by value
• 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
• ArrayObject::uksort() Sort the entries by keys using a user-defined comparison function