Question

如何访问数组中包含的对象的属性？

为什么下面的代码不起作用？

<?php

class Car{
    private $model;
    private $color;
    private $price;
    public function __car($model, $color, $price)
    {
        this.$model = $model;
        this.$color = $color;
        this.$price = $price;
    }
}

$cars = [];
$jetta = new Car("Jetta", "Red", 2500);
$cars[] = $jetta;

$cobalt = new Car("Cobalt", "Blue", 3000);
$cars[] = $cobalt;

// this is the part of the code that doesn't work
// I need to output the values from the objects, model, color and price
echo $cars[0]->$model; 
echo $cars[0]->$color;
echo $cars[0]->$price;

由于

Answer 1

您的语法和构造函数是错误的。

以下是最终代码：

<?php

class Car{
    // the variables should be public
    public $model;
    public $color;
    public $price;
    // this is how you write a constructor
    public function __construct($model, $color, $price)
    {
        // this is how you set instance variables
        $this->model = $model;
        $this->color = $color;
        $this->price = $price;
    }
}

$cars = [];
$jetta = new Car("Jetta", "Red", 2500);
$cars[] = $jetta;

$cobalt = new Car("Cobalt", "Blue", 3000);
$cars[] = $cobalt;

// this is how you access variables
echo $cars[0]->model; 
echo $cars[0]->color;
echo $cars[0]->price;

?>

Answer 2

您的代码中存在多个错误，我用箭头myBucketEndpointName指出了它们：

port 22: Connection timed out

如何访问数组中包含的对象的属性 - 请参阅代码

2 个答案: