SplObjectStorage
PHP Manual

SplObjectStorage::count

(PHP 5 >= 5.1.0, PHP 7)

SplObjectStorage::count — Returns the number of objects in the storage

说明

public int SplObjectStorage::count ( void )

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

Example #1 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
PHP Manual