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  • SplObjectStorage::count()

    (PHP 5 >= 5.1.0, PHP 7)

    Returns the number of objects in the storage

    说明

    publicSplObjectStorage::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