求大神指点
<?php
class Car {
public $speed = 0;
//增加speedUp方法，使speed加10
public function speedUp() {
speed +=10;
$this->speed ;
}
}
$car = new Car();
$car->speedUp();
echo $car->speed;
class Car {
public $speed = 0;
//增加speedUp方法，使speed加10
public function speedUp() {
speed +=10;
$this->speed ;
}
}
$car = new Car();
$car->speedUp();
echo $car->speed;
