Using $this when not in object context in PHP

Question

I don't know why i'm getting this error: Fatal error: Uncaught Error: Using $this when not in object context in C:\xampp\htdocs\app\index.php:19 Stack trace: #0 {main}

This is my index.php and where the error points out:

<?php 

require_once 'models/Request.php';

$req = new Request;

if(isset($_POST['submit'])){
    $data = [
        'reqBy' => $_POST['reqBy'],
        'off' => $_POST['off'],
        'prob' => $_POST['prob']
    ];

    echo "<pre>";
      print_r($data);
    echo "</pre>";

    if($this->req->addRequest($data)){ //This is the line where it points the error
        echo 'Sucess';
    }else{
        echo 'Something';
    }
}
?>

I'm kinda lost solving this for half a day, so i'm reaching out here

Solution 1

You are not inside instance of class to use $this. Try this, it will work

require_once 'models/Request.php';

$req = new Request;

if(isset($_POST['submit'])){
    $data = [
        'reqBy' => $_POST['reqBy'],
        'off' => $_POST['off'],
        'prob' => $_POST['prob']
    ];

    echo "<pre>";
      print_r($data);
    echo "</pre>";

    if($req->addRequest($data)){ //This is the line where it points the error
        echo 'Sucess';
    }else{
        echo 'Something';
    }
}
?>

Solution 2

You should use $req->addReques insted of $this->req->addReques

Solution 3

You canjust use your instance;

<?php 

require_once 'models/Request.php';

$req = new Request;

if(isset($_POST['submit'])){
    $data = [
        'reqBy' => $_POST['reqBy'],
        'off' => $_POST['off'],
        'prob' => $_POST['prob']
    ];

    echo "<pre>";
      print_r($data);
    echo "</pre>";

    if($req->addRequest($data)){ //This is the line where it points the error
        echo 'Sucess';
    }else{
        echo 'Something';
    }
}
?>

It will access parent class properties also.

Comments

[Admin]

You can use $this only inside classes. The pseudo-variable $this is available when a method is called from within an object context. $this is a reference to the calling object (usually the object to which the method belongs, but possibly another object, if the method is called statically from the context of a secondary object).

[Ugur Kazdal]

@Marat Badykov downvoted for my answer because I replied before him. Thats not cool bro.