SplObjectStorage::contains

(PHP 5 >= 5.1.0)

SplObjectStorage::contains — Checks if the storage contains a specific object

说明

public bool SplObjectStorage::contains ( object $object )

Checks if the storage contains the object provided.

参数

object: The object to look for.

返回值

Returns TRUE if the object is in the storage, FALSE otherwise.

范例

Example #1 SplObjectStorage::contains() example

  <?php
$o1  = new  StdClass ;
 $o2  = new  StdClass ;

 $s  = new  SplObjectStorage ();

 $s [ $o1 ] =  "hello" ;
 var_dump ( $s -> contains ( $o1 ));
 var_dump ( $s -> contains ( $o2 ));
 ?>

以上例程的输出类似于：

bool(true)
bool(false)

参见

SplObjectStorage::offsetExists() - Checks whether an object exists in the storage