SplObjectStorage::removeAllExcept

(PHP 5 >= 5.3.6, PHP 7, PHP 8)

SplObjectStorage::removeAllExceptRemoves all objects except for those contained in another storage from the current storage

说明

public SplObjectStorage::removeAllExcept(SplObjectStorage $storage): int

Removes all objects except for those contained in another storage from the current storage.

参数

storage

The storage containing the elements to retain in the current storage.

返回值

Returns the number of remaining objects.

范例

示例 #1 SplObjectStorage::removeAllExcept() example

<?php
$a 
= (object) 'a'
$b = (object) 'b'
$c = (object) 'c'

$foo = new SplObjectStorage;
$foo->attach($a);
$foo->attach($b);

$bar = new SplObjectStorage;
$bar->attach($b);
$bar->attach($c);

$foo->removeAllExcept($bar);
var_dump($foo->contains($a));
var_dump($foo->contains($b));
?>

以上例程的输出类似于:

bool(false)
bool(true)