CODEWITHSUNDEEP
phpoop
Nick
Nick

Reputation: 2970

Fatal error when extending included class

I am trying a very simple thing here but it doesn't seem to work. Take a look at this code:

include 'custom/mainclass.php';

$child = new childClass();

class childClass extends mainClass {
}

Apparently childClass() cannot be found (According to php).. I'm 100% sure I'm doing something very stupid in the way of ordering my code.

I already searched the web but from what I understand I'm doing nothing wrong..

Upvotes: 2

Views: 1704

Answers (2)

sybear
sybear

Reputation: 7784

You have to declare your classes in your code first before using them.

include 'custom/mainclass.php';

class childClass extends mainClass {

}

$child = new childClass(); //Create an instance after the class has been declared

EDIT:

After some research it turned out, that you can actually use a class before declaring it. But, declaration of the class and all parent classes must be in the same file.

So if you declare a parent class in one file and a child class in another, it won't work.

Also, you must declare parent classes first. After that you can extend them.

Upvotes: 11

worenga
worenga

Reputation: 5856

Same as with Variables, Functions or other language constructs,

First declare, then use.

Upvotes: 1

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