Use Redis in Symfony

Install redis server:

sudo apt-get install redis-server

Copy backup configuration file:

sudo cp /etc/redis/redis.conf /etc/redis/redis.conf.default

Check if redis is installed correctly by:


Install Predis library:

composer require predis/predis

Add to .env file


In services.yaml add following:

        class: Predis\Client
            - { host: '%env(REDIS_HOST)%' }

Example of predis client usage in Controller:

    const PREFIX = 'REDIS_TEST';

private $redis;

public function __construct(Client $redis)
$this->redis = $redis;

* @Route("/default", name="default")
public function index()
$key = \sprintf('%s:%d', self::PREFIX, (new \DateTime())->format('Ymd'));
$data = [];

if (!$this->redis->exists($key)) {
function ($pipe) use ($key, $data) {
/* @var Client $pipe */
$pipe->rpush(\sprintf('%s:key_list', self::PREFIX), [$key]);
['json' => json_encode(['first' => '123','second' => '456'])]

dump($this->redis->lrange(\sprintf('%s:key_list', self::PREFIX), 0, -1));

return $this->render('default/index.html.twig', [
'controller_name' => 'DefaultController',


Problem with NULL values you should remember

When trying to execute SELECT OR UPDATE query for rows different than a specific value, we should be aware to insert additional statement for null values too.

For Example:

        UPDATE account_event 
        SET account_event.assigned_to_id = 2 
        WHERE account_event.status != 1

With this query your goal is to update all rows where account_event.status is different from 1. But if status have null value it wont be updated!
In MySQL all null elements are skipped from comparison and will never be Selected or Updated.

When you have a null fields you should always add additional statement for null like this:

        UPDATE account_event 
        SET account_event.assigned_to_id = 2 
        WHERE account_event.status != 1 
        OR account_event.status IS NULL

Symfony – Create a service – the right way

Always create service interface for your service. This way you will have better structured code and phpunit testing will be real pleasure.
Also use dependency injection for your repositories in the service.

Service Interface Example

interface UserServiceInterface{
  public function getUsername();
  public function viewAll();

Service Example

class UserService implements UserServiceInterface

  private $entityManager;
  private $userRepository;

  public function __construct(EntityManager $entityManager, UserRepository $userRepository)
    $this->entityManager = $entityManager;
    $this->userRepository = $userRepository;

  public function viewAll()
    return $this->userRepository->findAll();

Repository Example

class UserRepository extends \Doctrine\ORM\EntityRepository
  public function __construct(EntityManager $em, Mapping\ClassMetadata $metadata = null)
      $metadata == null ?
      new Mapping\ClassMetadata(User::class) :

Symfony Security Authorization

There are several way to make authorization on your site with Symfony.
First is in your security.yml on the same level as firewalls tag:

        - { path: ^/admin, roles: ROLE_USER }

This will block all users that don’t have ‘ROLE_USER’ to admin page.

Second option is to use Controller. Inside Method insert:

            throw $this->createAccessDeniedException('GET OUT!');

Or like this:


This will deny access to all users that don’t have ‘ROLE_ADMIN’ to this method.

You can also use annotations:

* @Security("is_granted('ROLE_ADMIN')")

Annotations also work if you add them to the Class. So they will block all users that don’t have ‘ROLE_ADMIN’ to this class.

Continue reading “Symfony Security Authorization” »

Symfony Security Authentication

Create Entity named User

< ?php

namespace AppBundle\Entity;

use Symfony\Component\Security\Core\User\UserInterface;
use Doctrine\ORM\Mapping as ORM;

 * @ORM\Entity
 * @ORM\Table(name="user")
class User implements UserInterface
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     * @ORM\Column(type="integer")
    private $id;

     * @ORM\Column(type="string", unique=true)
    private $email;

     * @ORM\Column(type="string")
    private $password;

    private $plainPassword;

    public function getUsername()
        return $this->email;

    public function getRoles()
        return ['ROLE_USER'];

    public function getPassword()
        return $this->password;

    public function getSalt()

    public function eraseCredentials()
        $this->plainPassword = null;

     * @param mixed $email
    public function setEmail($email)
        $this->email = $email;

     * @param mixed $password
    public function setPassword($password)
        $this->password = $password;

     * @return mixed
    public function getPlainPassword()
        return $this->plainPassword;

     * @param mixed $plainPassword
    public function setPlainPassword($plainPassword)
        $this->plainPassword = $plainPassword;
        //This should be here to set value for password to activate doctrine listeners
        $this->password = null;


and generate migration:

#php bin/console doctrine:migrations:diff
#php bin/console doctrine:migrations:migrate

Continue reading “Symfony Security Authentication” »

PHP CURL Function Example

This function is populated with all needed data for curl to be executed

function get_curl($site_url){
	$ch = curl_init();

	curl_setopt($ch, CURLOPT_URL, $site_url);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
	curl_setopt($ch, CURLOPT_ENCODING, 'gzip, deflate');

	$headers = array();
	$headers[] = "Accept-Encoding: gzip, deflate, sdch";
	$headers[] = "Accept-Language: en-US,en;q=0.8";
	$headers[] = "Upgrade-Insecure-Requests: 1";
	$headers[] = "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.59 Safari/537.36";
	$headers[] = "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
	$headers[] = "Referer: $site_url";
	//Set a cookie if needed (you can set other values)
	$headers[] = "Cookie: D_SID=; D_IID=0108BE8F-6C68-31CF-9B9D-4308308DB3A6; D_UID=5A4BCE68-9FD2-3A70-B1DF-376B7D77FD4B; D_ZID=248B7EFC-E23A-3F71-A675-764EA373AEC6; D_ZUID=4DFFC8BD-0AD9-3DE0-94AE-60A57D49736A; D_HID=07EDD9E4-1EDF-3EE3-9D52-B67B5952F6EC";
	$headers[] = "Connection: keep-alive";
	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

	$result = curl_exec($ch);

	if (curl_error($ch)) {
		$output['status'] = '404';
		$output['msge'] = curl_error($ch);
	} else {
		$output['status'] = 'ok';
		$output['html'] = $result;

	curl_close ($ch);
	return $output;

Send Array to API with POST

function send_curl(array $array)

        $api = 'https://localhost/services/api';
        $action = 'test';
        $password = 'TestPass';

        $ch = curl_init($api);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(
                'password' => $password ,
                'data' => $array,
                'action' => $action,
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

        $serverOutput = curl_exec($ch);

        return $serverOutput;

MySQL Foreign Keys

A FOREIGN KEY is a field (or collection of fields) in one table that refers to the PRIMARY KEY in another table.
The table containing the foreign key is called the child table, and the table containing the candidate key is called the referenced or parent table.

* If you want to use foreign key all your tables should be with InnoDB engine.

Foreign Key on create table

    OrderID int NOT NULL,
    OrderNumber int NOT NULL,
    PersonID int,
    PRIMARY KEY (OrderID),
    FOREIGN KEY (PersonID) REFERENCES Persons(PersonID)

Continue reading “MySQL Foreign Keys” »

Setup Linux Ubuntu For Web Development

Install Node.js

sudo apt-get install curl

curl -sL | sudo -E bash -

sudo apt-get install -y nodejs

Install LAMP stack

sudo apt-get install apache2

sudo apt-get install php7.0 libapache2-mod-php7.0

sudo apt-get install mysql-server

sudo /etc/init.d/apache2 restart

Install phpmyadmin

sudo apt-get install phpmyadmin

sudo nano /etc/php/7.0/apache2/php.ini


sudo /etc/init.d/apache2 restart
sudo nano /etc/apache2/apache2.conf 

At the bottom of the file write:

Include /etc/phpmyadmin/apache.conf

Save it and then:

sudo /etc/init.d/apache2 restart

Install Filezilla

sudo apt-get install filezilla

Install Gimp

sudo add-apt-repository ppa:otto-kesselgulasch/gimp

sudo apt-get update

sudo apt-get install gimp

Install Chrome

wget -q -O - | sudo apt-key add -

echo 'deb [arch=amd64] stable main' | sudo tee /etc/apt/sources.list.d/google-chrome.list

sudo apt-get update 
sudo apt-get install google-chrome-stable

Install PhpStorm

Download linux version from

sudo tar xf PhpStorm-*.tar.gz -C /opt/

cd /opt/PhpStorm-*/bin

License server: