Host Simple Model

Code

host-simple
├── .env
├── Dockerfile
├── database
│   ├── config.php
│   ├── database.php
│   ├── schema.mwb
│   └── schema.sql
├── docker-compose.yml
├── install
│   └── index.php
├── model
│   └── host.php
└── test.php

docker-compose.yml:

version: "3"

services:
  web:
    container_name: web
    image: ifpb/php:7.3-apache-pdo
    build: .
    networks:
      - app-tier
    ports:
      - 8080:80
    volumes:
      - ./:/var/www/html/
    depends_on:
      - mysql

  mysql:
    container_name: mysql
    image: mysql:8.0
    command:
      - --default-authentication-plugin=mysql_native_password
    environment:
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
      MYSQL_DATABASE: ${MYSQL_DATABASE}
      MYSQL_USER: ${MYSQL_USER}
      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
    networks:
      - app-tier
    ports:
      - 3306:3306

  adminer:
    container_name: adminer
    image: adminer:4.7.5
    restart: always
    networks:
      - app-tier
    ports:
      - 8081:8080
    depends_on:
      - mysql

networks:
  app-tier:
    driver: bridge

Dockerfile:

FROM php:7.3-apache

RUN apt -y update \
  && apt install -y \
  mariadb-client

# pdo_mysql package
RUN docker-php-ext-install pdo_mysql

.env:

MYSQL_ROOT_PASSWORD=secret
MYSQL_DATABASE=example
MYSQL_USER=devuser
MYSQL_PASSWORD=devpass

Database

database/schema.sql:

DROP DATABASE IF EXISTS `computer`;
CREATE DATABASE `computer`;
USE `computer`;

DROP TABLE IF EXISTS `host`;
CREATE TABLE `host` (
  `id` int NOT NULL AUTO_INCREMENT,
  `name` varchar(100) NOT NULL,
  `address` varchar(100) NOT NULL,
  PRIMARY KEY (`id`)
);

INSERT INTO `host`
  (`name`, `address`)
VALUES
  ('www.google.com', '216.58.222.100');

Install

install/index.php:

<?php

require_once(__DIR__.'/../database/config.php');

try {
  $schema = file_get_contents('../database/schema.sql');
  $connection = new PDO(DB.":host=".DBHOST, DBUSER, DBPWD);
  $connection->exec($schema);
  echo "Database installed!";
  // header('Location: home.php');;
} catch (PDOException $e) {
  echo 'Connection failed: ' . $e->getMessage();
}

database/config.php:

<?php

const DB = 'mysql';
const DBHOST = 'mysql';
const DBNAME = 'computer';
const DBUSER = 'root';
const DBPWD = 'secret';

http://localhost:8080/install/

PDO Model

Database Model

database/database.php:

<?php
namespace Database;

use \PDO;

require_once('config.php');

class Database {

  protected $connection;

  function __construct(){
    $dsn = DB.":dbname=".DBNAME.";host=".DBHOST;
    try {
      $this->connection = new PDO($dsn, DBUSER, DBPWD);
    } catch (PDOException $e) {
      echo 'Connection failed: ' . $e->getMessage();
    }
  }

}

Host Model

model/host.php:

<?php
namespace Model;

use Database\Database;
use \PDO;

require_once __DIR__."/../database/database.php";

class Host extends Database {

  public function create($name, $address) {
    $sql = "INSERT INTO host (name, address) VALUES ('${name}', '${address}');";
    try {
      $this->connection->exec($sql);
      return $this->connection->lastInsertId();
    } catch(PDOExecption $e) { 
      $this->connection->rollback(); 
      print "Error!: " . $e->getMessage(); 
      return null;
    } 
  }

  public function read($id) {
    $sql = "SELECT * FROM host WHERE id = ${id}";
    $pdoStm = $this->connection->query($sql);
    return $pdoStm ? $pdoStm->fetch(PDO::FETCH_ASSOC) : null;
  }

  public function readByNameAddress($name, $address) {
    $sql = "SELECT * FROM host WHERE name='${name}' AND address='${address}'";
    $pdoStm = $this->connection->query($sql);
    return $pdoStm ? $pdoStm->fetch(PDO::FETCH_ASSOC) : null;
  }

  public function readAll() {
    $sql = "SELECT * FROM host";
    $pdoStm = $this->connection->query($sql);
    return $pdoStm ? $pdoStm->fetchAll(PDO::FETCH_ASSOC) : null;
  }

  public function readOrCreate($name, $address) {
    $result = $this->readByNameAddress($name, $address);

    if ($result) {
      return $result;
    } else {
      return $this->create($name, $address);
    }
  }
  
  public function update($id, $name, $address) {
    $sql = "UPDATE host
            SET name='${name}', address='${address}'
            WHERE id=${id}";
    try {
      return $this->connection->exec($sql);
    } catch(PDOExecption $e) { 
      $this->connection->rollback(); 
      print "Error!: " . $e->getMessage(); 
    }
  }
  
  public function remove($id) {
    $sql = "DELETE FROM host WHERE id=${id}";
    try {
      return $this->connection->exec($sql);
    } catch(PDOExecption $e) { 
      $this->connection->rollback(); 
      print "Error!: " . $e->getMessage(); 
    }
  }

}

How to CRUD

test.php:

<?php
use Model\Host;

require('model/host.php');

$host = new Host();

// Create IFPB 
$hostIFPBId = $host->create('www.ifpb.edu.br', '200.129.77.62');
var_dump($hostIFPBId);

// Get or create IFPB
$hostIFPB = $host->readOrCreate('www.ifpb.edu.br', '200.129.77.62');
var_dump($hostIFPB);

// Create IFRN
$hostIFRNId = $host->create('www.ifrn.edu.br', '200.137.2.130');
var_dump($hostIFRNId);

// Update IFRN
$host->update($hostIFRNId, 'www.ifrn.edu.br', '200.137.2.131');
$hostIFRN = $host->read($hostIFRNId);
var_dump($hostIFRN);

// Delete IFRN
var_dump($host->remove($hostIFRNId));

http://localhost:8080/test.php