README

• Environment & Filesystem Manager
  • Installation
  • Usage
    • Env Files
    • Environment
    • Add Attribute Containers
    • Implement Own Container
    • Get Container Parameter
  • Example

Installation

composer require treptowkolleg/env

Usage

Env Files

DotEnv files (.env) are used to store risky credentials out of client code. Make sure .env is added to .gitignore before commit.

# db credentials
DB_HOST=localhost
DB_NAME=databaseName
DB_USER=databaseUsername
DB_PASS=1234

# custom vars
VAR_1=x
VAR_2=y
VAR_3=z

Environment

<?php

require "vendor/autoload.php";

// projects root dir
$environment = new \TreptowKolleg\Environment();

// projects root dir . /data
$environment = new \TreptowKolleg\Environment(subDir: "data");

// systems user dir | HOME for Linux/macOS | HOMEPATH for Windows
$environment = new \TreptowKolleg\Environment(\TreptowKolleg\Path::USER_DIR);

Add Attribute Containers

<?php

// parse database credentials from .env.local or .env 
$environment->addContainer(new \TreptowKolleg\DatabaseContainer());

Implement Own Container

<?php

class MyContainer extends \TreptowKolleg\AttributeContainer
{
    public function __construct()
    {
        parent::__construct("my_container", ["MY_VAR1", "MY_VAR2", "MY_VAR3"]);
    }
}

$environment->addContainer(new MyContainer());

Get Container Parameter

<?php

$environment->getContainer("my_container")->getAttribute("MY_VAR1");

The DatabaseContainer also implements DatabaseInterface. That mentioned you can use special methods to instantiate a PDO-Object.

<?php

$dbContainer = $environment->getContainer('database');
if($dbContainer instanceof \TreptowKolleg\Interface\DatabaseInterface) {
    $pdo = $dbContainer->getPDO();
    $statement = $pdo->query("SELECT 5 + 1");
    // continue sql queries
}

// or much simpler:
if($pdo = $environment->getDatabaseObject()) {
    $statement = $pdo->query("SELECT 5 + 1");
    // continue sql queries
}

Example

<?php


use TreptowKolleg\DatabaseContainer;
use TreptowKolleg\Environment;

require 'vendor/autoload.php';

$env = new Environment();
$env->addContainer(new DatabaseContainer());

// Alle Attribute des Containers "database" ausgeben
foreach ($env->getContainer("database")->getAttributes() as $attribute => $value) {
    echo "$attribute: $value\n";
}

// SQL-Abfrage durchführen, falls Datenbank-Verbindung hergestellt werden konnte
if($pdo = $env->getDatabaseObject()) {
    $statement = $pdo->query("SELECT 5 * 2");
    $statement->execute();
    $statement->setFetchMode(\PDO::FETCH_ASSOC);
    $rows = $statement->fetchAll();

    foreach ($rows as $column => $value) {
        echo "$column: $value\n";
    }
}