ArrayObject::asort()

(PHP 5 >= 5.2.0, PHP 7)

Sort the entries by value

说明

publicArrayObject::asort(void): void

Sorts the entries such that the keys maintain their correlation with the entries they are associated with. This is used mainly when sorting associative arrays where the actual element order is significant.

参数

此函数没有参数。

返回值

没有返回值。

范例

ArrayObject::asort() example

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

以上例程会输出：

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

The fruits have been sorted in alphabetical order, and the key associated with each entry has been maintained.

参见

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