SplObjectStorage::removeAllExcept

(PHP 5 >= 5.3.6)

SplObjectStorage::removeAllExcept — Removes all objects except for those contained in another storage from the current storage

说明

public void SplObjectStorage::removeAllExcept ( SplObjectStorage $storage )

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

没有返回值。

范例

Example #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)

用户评论:

[#1] kirk at wa dot net dot ua [2011-06-21 02:12:17]

You may remove all elements by passing empty SplObjectStorage

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