php cannot find Class when using namespace

Question

I'm trying to make a object of a class from another file. Both file is located in the same folder & I used 'namespace App' in the both files. In the login files I'm trying to get the class object but it couldn't find the class. Codes are given below.

Database Class : 'Database.php'

<?php
    namespace App;

    require_once 'config.php'; 

class Database{

    private $db;

    public function __construct(){

        $this->db =  new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);

    }

    public function getConnection(){

        return $this->db;

    }

login.php file :

<?php

    namespace App;

    use App\Database; 

    require_once 'config.php'; 


    $DB = new Database(); 

    $con = $DB->getConnection;

When I execute login.php , it says Fatal error: Uncaught Error: Class 'App\Database' not found in login.php on line 10

use Database; if you're in the same \App namespace as the class you're using. — John Corry
– John Corry, Commented Dec 4, 2017 at 13:38

Mizanur Rahman Khan · Accepted Answer · 2017-12-04 13:55:03Z

3

I think you missing to require database file. Also, call the method by the following way. You are calling a property getConnection that is not available.

<?php
namespace App;
require_once 'config.php';
require_once 'Database.php';

use App\Database;

$DB = new Database();
$con = $DB->getConnection();

answered Dec 4, 2017 at 13:55

Mizanur Rahman Khan

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6 Comments

Misbah Ahmad Over a year ago

So, I've to require the files always event though I use namespace?

Mizanur Rahman Khan Over a year ago

Yeah @MisbahAhmad

Misbah Ahmad Over a year ago

Is there any way to avoid require?

Mm-Art-In Over a year ago

@MisbahAhmad YES: Use a PHP Autoloader

Javid Karimov Over a year ago

If you don't want to use require each time then use php's spl_autoload_register() function to automatically call classes @MisbahAhmad

|

Mm-Art-In · Accepted Answer · 2017-12-04 13:41:16Z

2

If you are in the root namespace:

use \App\Database; You want to tell PHP to search for App namespace in the namespace root, if that's where it is.

If you are in the App namespace:

use Database; You want to tell PHP to search for Database in the current namespace, if that's where it is.

If you are in another namespace:

If you're in another namespace (such as \Blob) then reference from the root, \App\Database, as above.

namespace App;

use App\Database;

This is currently looking for \App\App\Database and so is telling you that App\Database is not found in the \App namespace.

answered Dec 4, 2017 at 13:41

Mm-Art-In

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Comments

Kyle Wardle · Accepted Answer · 2017-12-04 15:15:03Z

0

If you are referencing the namespace in:

namespace App;

You do not need to then include the namespace in the 'use'.

namespace App;
use Database;

answered Dec 4, 2017 at 15:15

Kyle Wardle

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