SplObjectStorage::removeAllExcept

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

SplObjectStorage::removeAllExcept — Removes 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)

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User Contributed Notes 2 notes

down

kirk at wa dot net dot ua ¶

11 years ago


You may remove all elements by passing empty SplObjectStorage

$splStorage->removeAllExcept(new SplObjectStorage());

down

-1

hizer at hizercache dot com ¶

6 years ago


The example Kirk provided is not the best option, there's a method "removeAll" that you can pass the SplObjectStore itself, and as the name says, remove all stored objects.

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官方地址：https://www.php.net/manual/en/splobjectstorage.removeallexcept.php

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SplObjectStorage::removeAllExcept

说明

参数

返回值

范例

User Contributed Notes 2 notes