PHP Class; Notice: Undefined property error

Question

before I ask my question, I would like to say that I searched for this question, and none of the other answers helped...

Basically, in my class DemoClass, I have 4 functions, and all of them are "undefined properties"

My error:

Notice: Undefined property: DemoClass::$function in /home/content/92/10270192/html/class.php on line 46

Note: line 46 is where i do $demoClass->function...

I have a typical class setup:

class DemoClass {
    public function __construct () {
        // stuff that works and gets called
    }
    public function testFunct () {
        // one that is an "undefined property"
    }
}

I access the class as normal:

$testClass = new DemoClass();
var_dump(testClass->testFunct); // this is what is on line 46
// ^^^ This also gives me NULL, because its undefined (? i guess...)

I've never had this problem before, any suggestions? Thanks!

Huey · Accepted Answer · 2014-01-13 04:46:18Z

13

Brackets are required when calling a function. Change it to $testClass->testFunct() instead.

edited Jan 13, 2014 at 4:46

answered Jan 13, 2014 at 4:20

Huey

5,2206 gold badges36 silver badges45 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

mais-oui Over a year ago

My apologizes - that is a typo in the question, I have it correct in my implementation...

Phil Over a year ago

Should be $testClass (dollar-sign prefix)

Nick Coons · Accepted Answer · 2014-01-13 04:22:30Z

2

$testClass->testFunct references a variable testFunct in the class. You need to use $testClass->testFunct() to reference a function in the class.

answered Jan 13, 2014 at 4:22

Nick Coons

3,6921 gold badge21 silver badges22 bronze badges

2 Comments

mais-oui Over a year ago

Am I that dumb? Wait... yes I am - thanks! I need some sleep ;)

Nick Coons Over a year ago

Get to bed before you break any more of your code, then come back refreshed! :-)

Linga · Accepted Answer · 2014-01-13 04:22:46Z

1

It should be

var_dump(testClass->testFunct())

A function always needs the parentheses as else (as you can see) you can't tell the difference between a function and a constant.

answered Jan 13, 2014 at 4:22

Linga

10.6k10 gold badges57 silver badges109 bronze badges

Comments

kuroi neko · Accepted Answer · 2014-01-13 04:27:55Z

0

Unlike for instance JavaScript, PHP is not handling class methods as regular properties.

When you use $testClass->testFunct, PHP looks for a property named testFunct and finds none.

Methods can be referenced through class name, DemoClass::testFunct in your case.

answered Jan 13, 2014 at 4:27

kuroi neko

8,6781 gold badge23 silver badges45 bronze badges

2 Comments

Huey Over a year ago

Note: accessing methods via class name, like DemoClass::testFunct requires the method to be static.

kuroi neko Over a year ago

Well technically you can access it, but trying to invoke it will end up in tears (which makes this access of very limited use indeed).

Collectives™ on Stack Overflow

PHP Class; Notice: Undefined property error

4 Answers 4

2 Comments

2 Comments

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

2 Comments

2 Comments

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related