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<?php
class Book{
    static $num=0;
    public function showme(){
        echo 'ÄúÊǵÚ'.self::$num.'λ·Ã¿Í';
        self::$num++;
    
    }
}
$book1 = new Book();
$book1->showme();
echo"<br>";
$book2=new Book();
$book2->showme();
echo "<br>";
echo 'ÄúÊǵÚ'.Book::$num.'λ·Ã¿Í';
?>
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Õâ¾ä»°£¬Èç¹ûÊÊÓ¦µ½Õâ¸ö³ÌÐòµÄ»°£¬ÊDz»ÊÇclass Book{
    static $num=0;
    public function showme(){
        echo 'ÄúÊǵÚ'.self::$num.'λ·Ã¿Í';
        self::$num++;
    
    }
}
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