How to call functions from another class.
Many of my articles and videos are based on questions that I see popping up in the php forums or in emails sent to me personally.
Recently I was asked by someone how they could call a function found in one class, in another. This may seem like basic stuff to those of us who know … but please keep in mind, at one time, none of us knew anything!
Anyway, here is my video on using a function from another class in a class.
January 22nd, 2009 at 6:47 pm
Thank you for this tutorial. My question is, how do you call a function from another class if the classes are both instantiated from outside the classes (out at index.php, for example)?
For example, I have my class “website”, which executes session_start() among other things. My website class also houses encryption methods.
In my “pages” class, which I instantiate to create a page, it needs access to these encryption methods.
So these are instantiated from index.php, and I can’t instantiate website class twice, since it runs code that should only be executed once per page load.
I could pass my “website” object path when instantiating “pages”, but the code:
class page
{
public $website
function __construct($website)
{
$this->website->encrypt();
}
}
Fails to work. How would one get around this?
January 22nd, 2009 at 6:53 pm
You know what? I don’t need to use $this when referencing variables passed into the methods in classes. I think by removing “this->”, the code example will work. I answered my own question
Thanks again!
January 22nd, 2009 at 7:14 pm
Glad I could help!!
Stefan