PHP class with single variable

Question

I'm using this PHP code for creating PHP class with default single variable. But it's not work perfectly.

Note : I need to store data in single variable.

<?PHP

class hello
{
    public $data;
}

$test = new hello();

$test->data->user1->name = "Charan";
$test->data->user1->sex  = "male";
$test->data->user1->age  = "25";

$test->data->user2->name = "Kajal";
$test->data->user2->sex  = "female";
$test->data->user2->age  = "21";


print_r($test->data->user1);


?>

I got this error :

enter image description here

Please help me , how to fix it ?

How about using arrays instead of objects?

zerkms
– zerkms

2012-12-24 08:28:32 +00:00
Commented Dec 24, 2012 at 8:28 — zerkms
– zerkms, Commented Dec 24, 2012 at 8:28
You didn't initialize user1 and user2

Raptor
– Raptor

2012-12-24 08:29:22 +00:00
Commented Dec 24, 2012 at 8:29 — Raptor
– Raptor, Commented Dec 24, 2012 at 8:29
@Shivan Raptor: ... and data

zerkms
– zerkms

2012-12-24 08:29:52 +00:00
Commented Dec 24, 2012 at 8:29 — zerkms
– zerkms, Commented Dec 24, 2012 at 8:29
sorry i deleted my comment. its my fault

rOcKiNg RhO
– rOcKiNg RhO

2012-12-24 08:31:26 +00:00
Commented Dec 24, 2012 at 8:31 — rOcKiNg RhO
– rOcKiNg RhO, Commented Dec 24, 2012 at 8:31

prodigitalson · Accepted Answer · 2012-12-24 08:31:54Z

4

You have only declared the variable, but you havent set it up as a "type". For example youre trying to assign values to properties n an object... but $data is not an object - its not anything. You need to either assign an object to $data in the constructor for the class, or assign it from outside the class.

Constructor:

class hello
{
    public $data;

    public function __construct() {
        $this->data = new StdClass();

        // assuming you want the users set up here as well
        $this->data->user1 = new StdClass();
        $this->data->user2 = new StdClass();
    }
}

From Outside:

// assume we are use the same class definition from your orginal example
$test = new hello();
$test->data = new StdClass();
$test->data->user1 = new StdClass();
$test->data->user2 = new StdClass();

$test->data->user1->name = "Charan";
$test->data->user1->sex  = "male";
$test->data->user1->age  = "25";

$test->data->user2->name = "Kajal";
$test->data->user2->sex  = "female";
$test->data->user2->age  = "21";

answered Dec 24, 2012 at 8:31

prodigitalson

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4 Comments

zerkms Over a year ago

"its not anything" --- it's actually not anything but NULL

Jooxa Over a year ago

oh! it's not make any effect... :-(

zerkms Over a year ago

@user1882503: may be it's too early for objects then? How about arrays?

prodigitalson Over a year ago

@zerkms: HA! I never thought they were actually null... Im used to seeing people define explicitly like protected $something = null; if they want it null so always figured there was a difference.

Codethusiast · Accepted Answer · 2012-12-24 08:35:18Z

2

If you want your class flexible, $data variable inside hello class must be an array.

For example:

<?php

class Person{

public $data = array();

function __construct(){}

}

$person = new Person();
$person->data['name'] = 'Juan Dela Cruz';

echo $person->data['name'];

?>

answered Dec 24, 2012 at 8:35

Codethusiast

414 bronze badges

2 Comments

zerkms Over a year ago

Why do you need an empty constructor?

Codethusiast Over a year ago

Its a template from my editor, it creates a default empty constructor

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