SplObjectStorage::count()
(PHP 5 >= 5.1.0, PHP 7)
Returns the number of objects in the storage
说明
public SplObjectStorage::count(void) : int
Counts the number of objects in the storage.
参数
此函数没有参数。
返回值
The number of objects in the storage.
范例
SplObjectStorage::count() example
<?php $s = new SplObjectStorage(); $o1 = new StdClass; $o2 = new StdClass; $s->attach($o1); $s->attach($o2); $s->attach($o1); var_dump($s->count()); var_dump(count($s)); ?>
以上例程的输出类似于:
int(2) int(2)
参见
- SplObjectStorage::attach() Adds an object in the storage
- SplObjectStorage::detach() Removes an object from the storage