SplObjectStorage::offsetGet

(PHP 5 >= 5.3.0, PHP 7)

SplObjectStorage::offsetGet — Returns the data associated with an object

说明

public SplObjectStorage::offsetGet ( object $object ) : mixed

Returns the data associated with an object in the storage.

参数

object

The object to look for.

返回值

The data previously associated with the object in the storage.

错误／异常

Throws UnexpectedValueException when object could not be found.

范例

Example #1 SplObjectStorage::offsetGet() example

<?php
$s = new SplObjectStorage;

$o1 = new StdClass;
$o2 = new StdClass;

$s[$o1] = "hello";
$s->attach($o2);


var_dump($s->offsetGet($o1)); // Similar to $s[$o1]
var_dump($s->offsetGet($o2)); // Similar to $s[$o2]
?>

以上例程的输出类似于：

string(5) "hello"
NULL

参见