Fix Uncaught ReflectionException: Class log does not exist …/laravel/framework/…

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I again got this error which left me no clue of what happened wrong and how can I fix it.

PHP Fatal error: Uncaught ReflectionException: Class log does not exist in .../vendo/laravel/framework/src/Illuminate/Container/Container.php:741

I tried to find solution on google for a while and came to know that this don’t tell what acually went wrong. There can be different things which can be in different case. And you will find nothing other than someone will be telling that this error just mean something crashed earlier on before that interface was bound. So it tells nothing useful.

I found different reasons for this, but most commonly it was after you updated something in your system, which effected some extension of php or something else went wrong.

Here I am not going to dig deeper into why it happened because there can be lot of different reasons, I am just trying to tell a way by which I came to know the reason and fixed it. It happened to me twice in last few months and I found nothing on stackoverflow so that’s why I am writing it here.

So here are steps to find the reason and fix:

  1. Good thing about Laravel is that it checks some obvious dependencies which are required for Laravel to function properly. So go to some other directory and try installing Laravel’s same version there.  You can install it using
    composer create-project --prefer-dist laravel/laravel blog

    while in my case I was using Laravel bootstrap so I ran

    composer create-project graham-campbell/bootstrap-cms --prefer-dist -s dev
  2. It will show you missing dependencis, so you can see the dependencies and try to resolve them by installing missing extensions. In my case it was ext-mbstring  missing and in someone else’s case it was php-mysql extension missing. So install whatever extension is missing in your case.
  3. After installing extension don’t forget to restart apache:
    sudo service apache2 restart
  4. Once you have those extensions installed and your able to complete Laravel installation, go back to actual Laravel installation directory where you were actually facing above mentioned issue.
  5. Once you are there, give all permissions to `storage` and `bootstrap/cache` directories in Laravel installation by doing:
    sudo chmod 777 storage -R
    sudo chmod 777 bootstrap/cache -R
  6.  Now execute following command:
    php artisan clear-compiled
  7. If you see error like:
    PHP Fatal error: Trait 'Illuminate\Auth\Access\HandlesAuthorization' not found in ...dynamic/bootstrap/cache/compiled.php on line 737
    Script php artisan clear-compiled handling the post-install-cmd event returned with an error[RuntimeException]Error Output: PHP Fatal error: Trait 'Illuminate\Auth\Access\HandlesAuthorization' not found in /var/www/html.../bootstrap/cache/comp

    Delete the contents of the bootstrap/cache folder, then run

    php artisan app:update 

    and try running

     php artisan clear-compiled

    again.

  8. After doing so just run:
    composer dump-autoload
  9. And then go to your browser and try to reload. Most probably it should be working as this is how I had it working twice.

In case it still don’t work, then post it in comment and we can try to dig into that.

Configuring and using Laravel with MongoDB

This entry is part 1 of 1 in the series MongoDB
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In this article we will see how to use MongoDB with Laravel (PHP framework). So first we need to install MongoDB and Laravel.

Laravel and MongoDB installation:

We will install Laravel and MongoDB one by one and I assume that you have PHP already installed with a web server.

Laravel Installation:

I assume LAMP environment is already configured. You can install Laravel simply through composer using following command if you have Composer already installed.

composer create-project laravel/laravel --prefer-dist

If you don’t know about composer or want to know more detailed installation and configuration of Larvel then Laravel documentation explained it in detail: http://laravel.com/docs/5.1#installation

MongoDB installation:

If you haven’t already installed MongoDB then MongoDB have separate guides for installing it own different Operating Systems. So check that: http://docs.mongodb.org/manual/installation/

Current version of MongoDB at this time is 3.x. But it you have MongoDB version 2.x installed and running on your machine then still feel free to use this tutorial, as it will work for 2.x as well and it have stuff related to 2.x difference in user creation section.

MongoDB driver for PHP:

PHP have official MongoDB driver that is called Mongo. It contains MongoClient class that is used by several packages which connect PHP with MongoDB.

You can install MongoDB driver on Windows OS using steps mentioned here: http://haafiz.me/development/installing-mongodb-driver-mongoclient-for-php-on-windows

To install MongoDB driver on ubuntu  or other Linux distributions, follow steps mentioned here: http://haafiz.me/development/installing-mongodb-driver-mongoclient-for-php-on-ubuntu

To check if MongoDB driver is successfully installed, try instantiating MongoClient class.

Laravel Package for MongoDB:

Laravel have several MongoDB related packages and some of them not work for Laravel 5.x (current versions at time of this writing). Based on several factors like number of contributers, number of commits, releases and documentation on github, simplicity and ease of use, I suggest using jenssegers/laravel-mongodb which is also knowns as Moloquent.

Installation:

To install for Laravel 5.1, install latest stable version using composer.

composer require jenssegers/mongodb

In config/app.php :

Add below line in providers array:

Jenssegers\Mongodb\MongodbServiceProvider::class,

And add in same file, add below line in aliases array:

'Moloquent' => 'Jenssegers\Mongodb\Model',

Moloquent Configurations:

In app/config/database.php, add MongoDB connection detail:

'mongodb' => array(
            'driver' => 'mongodb',
            'host' => env('DB_HOST', 'localhost'),
            'port' => env('DB_PORT', 27017),
            'database' => env('DB_DATABASE', 'l5'),
            'username' => env('DB_USERNAME', 'l5'),
            'password' => env('DB_PASSWORD', '123456'),
            'options' => array(
                'db' => 'admin' // sets the authentication database required by mongo 3
            )
        ),

and make this mongodb connection, default connection.

'default' => env('DB_CONNECTION', 'mongodb'),

If you have installed MongoDB just now then you will not have Database, username and password to provide in connection info. For that purpose you need to first create database, username and password.

Setting up MongoDB Database and User:

To create a MongoDB database, you need to start, execute “mongo” from command line. To do so you need to add MongoDB bin directory to your system path. And then run:

mongod

This will run mongo server to listen calls.

In case you see error like: “data/db not found” , then that means that this path doesn’t exist on your system or don’t have appropriate permissions. So either create and assign appropriate permissions at that location or with appropriate permissions create DB data folder at some other custom location and give DB path like:

mongod --dbpath custom/directory/path

Once it is running, mongo server will be listening for client calls. So you need to run mongo shell client by simply opening another shell instance and run :

mongo

This will open mongoDB shell.

Creating Database in MongoDB:

Using mongo client shell, you need to create your database

> use dbname
> db.insert({"key":"value"})

By executing above statement, use statement switches DB to “dbname”, and assigns value “dbname” to variable “db”  so you can use your desired DB name. If “dbname” is name of existing database then it will switch to that database or else it will create that Database if atleast one record is added to that database.

Setting up First User and access:

If you are using Mongo 3.0 or above, first of all you need to switch to “admin” database and creating a user with administrative rights for all databases.

> use admin
> db.createUser(
  {
    user: "siteUserAdmin",
    pwd: "password",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
)

You can replace “siteUserAdmin” and “password” from above code with your desired admin username and password. Role “userAdminAnyDatabase” is a special role for administrating all databases and this role is at “admin” database.

Once you have this Admin user on admin DB, you need to create user for your required DB, in our case “dbname”.

> use records
> db.createUser(
  {
    user: "recordsUserAdmin",
    pwd: "password",
    roles: [ { role: "userAdmin", db: "records" } ]
  }
)

Here you can replace “recordsUserAdmin”,”password” and “dbname” with desired username, password and your intended database name. And this will set your admin user for that database.

If you are using MongoDB version 2.x then user creation is different. In version 2.x db.createUser() function is not present. You need to use db.addUser() like:

> use products
> db.addUser( { user: "user1",
              pwd: "password",
              roles: [ "readWrite", "dbAdmin" ]
            } )

So now you have DBname, username and password to put in you Laravel app/config/database.php

Extending Models from Moloquent:

Only thing that is left is to extend your models from “Moloquent” instead of “Eloquent”.  So a typical model will look like this:

<?php
namespace App\Models;

use Moloquent;

/**
 * Category Model
 *
 * @author Hafiz Waheeduddin
 */
class Category extends Moloquent
{
 public function tasks()
 {
 return $this->hasMany('App\Models\Task', 'category_id');
 }
}

So after that you can simply run most of queries of query builder through category model. And can utilized ORM in similar way as Moloquent supports many types of relationships, so you can utilize them too.

Moloquent Detail and Documentation:

Moloquent have very good examples at github to understand it and use it. So for Moloquent usage, reference and understanding, please check moloquent github page .

Installing Laravel on Windows

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I wrote an article on Installing LAMP environment on ubuntu cloud instance that somebody found helpful and he requested me to write for Laravel installation and configuration for Windows development machine. So here is step by step guide.

XAMPP:

I assume you have XAMPP or equivalent installed and running. If not then download it from https://www.apachefriends.org/download.html

 Composer:

Then second thing you should have is composer. Composer is a dependency manager for PHP. To check if you already have composer installed, open command prompt and type following command and hit enter:

composer –version

If you see composer version then it is installed, but if you don’t see that and instead see:

‘composer’ is not recognized as an internal or external command, operable program or batch file

Then you need to install composer. So download and install composer by following steps from here: https://getcomposer.org/doc/00-intro.md#installation-windows

Installing Laravel via Composer:

We will install Laravel using composer. But first you need to switch to your www root directory.  For XAMPP it will be htdocs folder in your xampp directory.

Type following command in command prompt and hit enter:

composer create-project laravel/laravel --prefer-dist

This will start downloading laravel and its dependencies that may take few minutes.

And it is installed. To test it hit:

http://localhost/laravel/public/

And you should see Laravel welcome screen. Once you have Laravel installed and running, Laravel website has a good documentation that you can follow. And if you want even better source than that, Laracasts is the place to start.