Example of a Small PHP Application Built Without A Framework

Application.php

<?php
//FILENAME: /spaghetti-monster/src/Application.php

namespace SpaghettiMonster;

use SpaghettiMonster\Domain\EntityRepository;
use SpaghettiMonster\Domain\EntitySearch;
use SpaghettiMonster\Domain\EntityUpdater;
use SpaghettiMonster\Domain\Twitter\ApiClient;
use SpaghettiMonster\Domain\Twitter\TweetCreator;
use SpaghettiMonster\Http\ReCaptchaGuard;
use SpaghettiMonster\Infrastructure\EntityPdoRepository;
use SpaghettiMonster\Infrastructure\Twitter\DefaultApiClient;
use PDO;

class Application
{
    /**
     * @var array
     */
    private $config;

    public function __construct(array $config)
    {
        $this->config = $config;
    }

    /**
     * @return EntityRepository
     */
    protected function repository()
    {
        $dbConfig = $this->config['database'];
        $dsn = isset($dbConfig['dsn']) ? $dbConfig['dsn'] : "mysql:dbname={$dbConfig['db']};host={$dbConfig['host']}";
        $pdo = new PDO($dsn, $dbConfig['user'], $dbConfig['pass']);
        return new EntityPdoRepository($pdo, $dbConfig['table']);
    }

    /**
     * @return ApiClient
     */
    protected function twitterApi()
    {
        return new DefaultApiClient($this->config['twitter']['consumer_key'], $this->config['twitter']['consumer_secret']);
    }

    /**
     * @return EntitySearch
     */
    public function search()
    {
        return new EntitySearch( $this->repository() );
    }

    /**
     * @return EntityUpdater
     */
    public function updater()
    {
        return new EntityUpdater( $this->repository() );
    }

    /**
     * @return TweetCreator
     */
    public function tweetCreator()
    {
        return new TweetCreator(
            $this->twitterApi(),
            $this->config['twitter']['access_token'],
            $this->config['twitter']['access_token_secret']
        );
    }

    /**
     * @return bool
     */
    public function hasReCaptcha()
    {
        return $this->config['recaptcha']['enabled'];
    }

    /**
     * @return ReCaptchaGuard|null
     */
    public function reCaptchaGuard()
    {
        if (!$this->config['recaptcha']['enabled']) {
            return null;
        }
        $reCaptcha = new \ReCaptcha\ReCaptcha($this->config['recaptcha']['secret_key']);
        return new ReCaptchaGuard($reCaptcha, $this->config['recaptcha']['site_key']);
    }

    /**
     * @return array
     */
    public function config()
    {
        return $this->config;
    }

    /**
     * @return string[]
     */
    public function namePrefixes()
    {
        return $this->config['prefixes'];
    }

    /**
     * Requires a template and extracts specified template data along with the
     * application instance as $app
     *
     * @param string $templateName
     * @param array $templateData
     * @return string
     */
    public function template($templateName, array $templateData = [])
    {
        $templateData['app'] = $this;
        extract($templateData, EXTR_SKIP);
        ob_start();
        require rtrim($this->config['template_dir'], '/') . "/$templateName";
        return ob_get_clean();
    }
}

bootstrap.php

<?php
//FILENAME: /spaghetti-monster/setup/bootstrap.php

error_reporting(E_ALL | E_NOTICE);
require __DIR__ . '/../vendor/autoload.php';
$config = require_once __DIR__ . '/settings.php';
error_reporting(E_ALL | E_NOTICE);
ini_set('display_errors', $config['debug']);
session_start();

$app = new \HonorVote\Application($config);

index.php

<?php
//FILENAME: /spaghetti-monster/public/index.php

require_once __DIR__ . '/../setup/bootstrap.php';

use SpaghettiMonster\Http\Formatter;
use SpaghettiMonster\Domain\EntitySpec;

$search = $app->search();

$page = isset($_GET['page']) ? $_GET['page'] : 1;
$searchValue = isset($_GET['search']) ? $_GET['search'] : '';
$searchField = isset($_GET['field']) ? $_GET['field'] : '';

$spec = new EntitySpec('', '', 'approved');
if($searchValue) {
    if ($searchField === 'FooLast') {
        $spec->fooLastName($searchValue);
    } else {
        $spec->barLastName($searchValue);
    }
}
$spec->currentPage($page);

$count = $search->totalForSpecification($spec);

$total = $search->totalForSpecification( EntitySpec::all() );
$results = $search->searchBySpecification($spec);
?>
<?= $app->template('header.php') ?>

<!-- insert lots of HTML code here -->

<?= $app->template('footer.php') ?>
</body>
</html>

settings.php

<?php
//FILENAME: /spaghetti-monster/setup/settings.php

return [
    'debug'                 => true,
    'recaptcha'             => [
        'enabled'           => true,
        'site_key'          => '',
        'secret_key'        => '',
    ],
    'template_dir'          => __DIR__ . '/../includes',
    'database'              => [
        'host'  => 'localhost',
        'user'  => '',
        'pass'  => '',
        'db'    => 'spaghetti_monster_local',
        'options'   => [
            PDO::ATTR_ERRMODE               => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE    => PDO::FETCH_ASSOC
        ],
        'table' => 'honor_vote2016',
    ],
    'twitter'               => [
        'consumer_key'          => '',
        'consumer_secret'       => '',
        'access_token'          => '',
        'access_token_secret'   => ''
    ],
    'prefixes'              => [
        'Ms',
        'Miss',
        'Mrs',
        'Mr',
        'Other'
    ]
];