SplObjectStorage
PHP Manual

SplObjectStorage::contains

(PHP 5 >= 5.1.0, PHP 7)

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
PHP Manual