SplObjectStorage::count

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

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

说明

public SplObjectStorage::count(int $mode = COUNT_NORMAL): int

Counts the number of objects in the storage.

参数

mode: If the optional mode parameter is set to COUNT_RECURSIVE (or 1), SplObjectStorage::count() will recursively count the storage.

返回值

The number of objects in the storage.

示例

示例 #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));
?>

以上示例的输出类似于：

int(2)
int(2)

参见

SplObjectStorage::attach() - Adds an object in the storage
SplObjectStorage::detach() - Removes an object from the storage

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