Countable::count()

(PHP 5 >= 5.1.0, PHP 7)

统计一个对象的元素个数

说明

当使用count()函数作用于一个实现了Countable的对象时这个方法会被执行.

参数

此函数没有参数。

返回值

The custom count as an integer.

The return value is cast to an integer.

范例

Countable::count() example

以上例程的输出类似于：

I have been count()ed 1 times
I have been count()ed 2 times
I have been count()ed 3 times
I have been count()ed 4 times
I have been count()ed 5 times
I have been count()ed 6 times
I have been count()ed 7 times
I have been count()ed 8 times
I have been count()ed 9 times
I have been count()ed 10 times

Even though Countable::count method is called when the object implementing Countable is used in count() function, the second parameter of count, $mode, has no influence to your class method. 
$mode is not passed to Countable::count:

var_dump output:
array(0) {
}

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