Why do I need to explicitly instantiate an object?

Question

I am having a problem on my MVC framework. Here is my loadModel() method inside the main controller:

public function loadModel($name) {
$path = 'models/' . $name . '_Model.php';

    if (file_exists($path)) {
        require $path;  
        $modelName = $name . '_Model';
        $this->model = new $modelName;
    }
}

As you can see, when i try to load a controller, it automatically loads a model with the same name + _model.php.

I do not have any problem, when I use wamp or xampp, but, when I uploaded it in my website, it says "Undefined property" on every model. That means the model is not loaded. I know the problem is in there...

Is that some kind of an error in php.ini file of the server? Or maybe it because of different PHP versions?

possible duplicate of [Class not found PHP OOP](http://stackoverflow.com/questions/11375225/class-not-found-php-oop) — tereško, Jul 19 '12 at 14:14
Have you turned on full error reporting on your local server ? — tereško, Jul 19 '12 at 14:18

score 2 · Accepted Answer · answered Jul 19 '12 at 13:08

2

Windows is not case sensitive, i.e. Model.php and model.php are the same as far as windows is concerned. ON unix/linux however (which I'm assuming your website server is) the file system IS case sensitive.

Basically, check your files names - if you're trying to load $name_Model.php but the file is $name_model.php it's going to fail when you upload it.

answered Jul 19 '12 at 13:08

Dan Smith

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I think you are right!! i am loading it like for example login_Model, whose class is Login_Model now I Know!!! thank you, gotta test it now!!!! – Joey Hipolito Jul 19 '12 at 13:16

score 1 · Answer 2 · answered Jul 19 '12 at 13:09

1

You might wanna consider using autoloading, that fixes all your problems:

answered Jul 19 '12 at 13:09

Sherlock

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score 1 · Answer 3 · answered Jul 19 '12 at 13:09

Don't rely on relative paths, they depend on the current directory.

Make an absolute path like (adapt to your needs):

$path = __DIR__ . '/models/' . $name . '_Model.php';

If you get something like that to work locally, it should work on the server too.

BTW, i don't understand why _Model suffix. Wouldn't models/Car.php be sufficient ?

Why do I need to explicitly instantiate an object?

3 Answers3