Countable::count

(PHP 5 >= 5.1.0)

Countable::count — Count elements of an object

说明

abstract public int Countable::count ( void )

This method is executed when using the count() function on an object implementing Countable.

参数

此函数没有参数。

返回值

The custom count as an integer.

Note:
The return value is cast to an integer.

范例

Example #1 Countable::count() example


<?php
class myCounter implements Countable {
    public function count() {
        static $count = 0;
        return ++$count;
    }
}

$counter = new myCounter;

for($i=0; $i<10; ++$i) {
    echo "I have been count()ed " . count($counter) . " times\n";
}
?>

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