PHP Manual
SplObjectStorage
Returns the data associated with an object

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

SplObjectStorage::offsetSet() - Associates data to an object in the storage
SplObjectStorage::offsetExists() - Checks whether an object exists in the storage
SplObjectStorage::offsetUnset() - Removes an object from the storage

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