Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP

<?php
class Car
{
    var $color = "add";
    function Car($color="green") {
        $this->color = $color;
    }
    function what_color() {
        return $this->color;
    }
}

$car = new Car;
echo $car->what_color(),"<br>over";
?>

PHP版本号

php 7.0.10

所报错误

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Car has a deprecated constructor in E:\phpStorm\firstPhp\test.php on line 8

解决方式

查阅资料，发现php7.0之后将不再支持与类名相同的构造方法，构造方法统一使用 __construct()。

改正后代码

<?php
class Car
{
    public $color = "add";
    function __construct($color="green") {   //注意是双下划线
        $this->color = $color;
    }
    public function what_color() {
        return $this->color;
    }
}

$car = new Car("red");
echo $car->what_color(),"<br>over";
?>