Solved

List all classes inherited from

Posted on 2014-04-08
4
198 Views
Last Modified: 2014-04-08
Is it possible to list all classes that have extended from class:-

So for example, I want to create a class called certificate, but there are several types of certificate some will override function from certificate some wont, so Ive set it up like:-
<?php
	class certificate {
		public function getDesciption() {
			return 'No description stored';
		}
	}













	class foo extends certicate {
		public function getDesciption() {
			return 'This is a Foo certificate';
	    	}
	}


	class bar extends certicate {
		public function getDesciption() {
			return 'This is a bar certificate';
		}
	}
?>

Open in new window


However if I want to list all the objects created from 'certificate' and call 'getDescription' from each, is there a method in PHP to list all objects created, and see what it extends from?

Thank you in advance
0
Comment
Question by:tonelm54
  • 3
4 Comments
 
LVL 108

Assisted Solution

by:Ray Paseur
Ray Paseur earned 500 total points
ID: 39985835
Maybe something like this?
http://php.net/manual/en/function.get-called-class.php

The question is kind of counterintuitive because your own PHP code will create the objects, so looking for a PHP function to tell you what objects you created doesn't make sense to me.  It would make more sense to keep an internal record of the classes used to instantiate the objects.  An array of objects is a very useful programming construct!
0
 
LVL 108

Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 39985873
See if this makes some sense.

<?php // demo/temp_tonelm54.php
ini_set('display_errors', TRUE);
error_reporting(E_ALL);

class Certificate
{
    public function getDescription()
    {
        echo PHP_EOL . 'This is a ' .  get_class($this) . ' certificate';
    }

    public function whoAmI()
    {
        echo PHP_EOL . 'I am an Object Instance of ' .  get_class($this);
    }
}

class Foo extends certificate
{
    public function getDescription()
    {
        echo PHP_EOL . 'This is a ' .  get_class($this) . ' certificate';
    }
}

class Bar extends certificate
{
    public function getDescription()
    {
        echo PHP_EOL . 'This is a ' .  get_class($this) . ' certificate';
    }
}

echo '<pre>';
$c = new Certificate;
$f = new Foo;
$b = new Bar;

$c->getdescription();
$f->getdescription();
$b->getdescription();

$c->whoami();
$f->whoami();
$b->whoami();

Open in new window

0
 

Author Closing Comment

by:tonelm54
ID: 39986942
Thank you
0
 
LVL 108

Expert Comment

by:Ray Paseur
ID: 39987127
Glad to help.  Thanks for the points and thanks for using EE, ~Ray
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Things That Drive Us Nuts Have you noticed the use of the reCaptcha feature at EE and other web sites?  It wants you to read and retype something that looks like this.Insanity!  It's not EE's fault - that's just the way reCaptcha works.  But it is …
This article discusses four methods for overlaying images in a container on a web page
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
The viewer will learn how to dynamically set the form action using jQuery.

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now