Countable::count

(No version information available, might be only in CVS)

Countable::count — Count elements of a object

説明

abstract public integer Countable::count ( void )

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

パラメータ

この関数にはパラメータはありません。

返り値

The custom count as integer.

注意: The return value is casted to integer.

例

例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";
}
?>

上の例の出力は、たとえば以下のようになります。

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