How can I access properties in objects contained in an array - see code

Question

How can I access properties in objects contained in an array?

Why does the code below doesn't work?

<?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;

Thanks

Go look up what private visibility means.

C3roe
– C3roe

2016-07-19 14:21:45 +00:00
Commented Jul 19, 2016 at 14:21 — C3roe
– C3roe, Commented Jul 19, 2016 at 14:21

nyumerics · Accepted Answer · 2016-07-19 14:20:01Z

Your syntax and constructor is wrong.

Here is the final code:

<?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; ?>

Jose Manuel Abarca Rodríguez · Accepted Answer · 2016-07-19 14:30:37Z

There are multiple errors in your code, I have pointed them with arrows ◄■■■ :

<?php class Car{ public $model; //◄■■■■■■■■■■ IF PRIVATE YOU WILL NOT public $color; //◄■■■■■■■■■■ BE ABLE TO ACCESS THEM public $price; //◄■■■■■■■■■■ FROM OUTSIDE. public function __construct ($model, $color, $price) //◄■■■ CONSTRUCT { $this->model = $model; //◄■■■■■■■■■■■■■■■■■■■■■■■ NOT THIS.$ $this->color = $color; //◄■■■■■■■■■■■■■■■■■■■■■■■ NOT THIS.$ $this->price = $price; //◄■■■■■■■■■■■■■■■■■■■■■■■ NOT THIS.$ } } $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; //◄■■■■■■■■■■■■■■■■■■ PUBLIC PROPERTY WITHOUT $. echo $cars[0]->color; //◄■■■■■■■■■■■■■■■■■■ PUBLIC PROPERTY WITHOUT $. echo $cars[0]->price; //◄■■■■■■■■■■■■■■■■■■ PUBLIC PROPERTY WITHOUT $. ?>

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