如何从非实例类的实例上运行方法/函数？

Question

Pardon any mistakes in verbiage, I am trying to learn classes.

Once an object has been instantiated, I understand that methods from that class become available to me. My question is, how am I able to run methods from a class other than the instantiated one on said object?

Specifically:

class image {
    public static function create() {
        $image = new Imagick($file);
        $image -> image::autoRotate($image);
        ...
    }

    public static function autoRotate($image) {
        ...
    }
}

the line $image -> image::autoRotate($image) yields the error, and I understand the syntax and/or my understanding are at fault. Can someone kindly help me understand how to accomplish this please?

Answer 1

Because the the image class isn't actually a property of the $image object, you don't need to use the $image -> syntax to perform that operation. Since autoRotate() is a static function, it can be called just from the class accessor image::autoRotate($image);

class image {
    public static function create() {
        $image = new Imagick($file);
        image::autoRotate($image); // removed $image ->
    ...
    }

    public static function autoRotate($image) {
    ...
    }
}