Creating a config file in PHP

<?php

return array(
    'host' => 'localhost',
    'username' => 'root',
);

$configs = include('config.php');

[database]
db_name     = mydatabase
db_user     = myuser
db_password = mypassword

[application]
app_email = [email protected]
app_url   = myapp.com

$ini = parse_ini_file('app.ini');

echo $ini['db_name'];     // mydatabase
echo $ini['db_user'];     // myuser
echo $ini['db_password']; // mypassword
echo $ini['app_email'];   // [email protected]

<?php

return (object) array(
    'host' => 'localhost',
    'username' => 'root',
    'pass' => 'password',
    'database' => 'db'
);

?>

<?php

    $configs = include('config.php');
    echo json_encode($configs->app_info);

?>

<?php

return (object) array(
    'host' => 'localhost',
    'username' => 'root',
    'pass' => 'password',
    'database' => 'db',
    'app_info' => array(
        'appName'=>"App Name",
        'appURL'=> "http://yourURL/#/"
    )
);

?>

class Config 
{
    static $dbHost = 'localhost';
    static $dbUsername = 'user';
    static $dbPassword  = 'pass';
}

Config::$dbHost  

$dataSource = 'mysql' // or 'json'

class Config 
{
  // ....
  static $dataSource = 'mysql';
  / .....
}

class AppConfig
{
    private static $instance;
    private $dataSource;

    private function __construct()
    {
        $this->init();
    }

    private function init()
    {
        switch (Config::$dataSource)
        {
            case 'mysql':
                $this->dataSource = new StorageMysql();
                break;
            case 'json':
                $this->dataSource = new StorageJson();
                break;
            default:
                $this->dataSource = new StorageMysql();
        }
    }

    public static function getInstance()
    {
        if (empty(self::$instance)) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    public function getDataSource()
    {
        return $this->dataSource;
    }
}

$container->getItemsLoader(AppConfig::getInstance()->getDataSource()) // getItemsLoader need Object of specific data source class by dependency injection

    <?php

    define('DEBUG',0);

    define('PRODUCTION',1);



    #development_mode : DEBUG / PRODUCTION

    $development_mode = PRODUCTION;



    #Website root path for links

    $app_path = 'http://192.168.0.234/dealer/';



    #User interface files path

    $ui_path = 'ui/';

    #Image gallery path

    $gallery_path = 'ui/gallery/';


    $mysqlserver = "localhost";
    $mysqluser = "root";
    $mysqlpass = "";
    $mysqldb = "dealer_plus";

   ?>

class Configuration
{

    private $config;

    
    public function __construct($configIniFilePath)
    {
        $this->config = parse_ini_file($configIniFilePath, true);
    }

    /**
     * Gets the value for the specified setting name.
     *
     * @param string $name the setting name
     * @param string $section optional, the name of the section containing the
     *     setting
     * @return string|null the value of the setting, or null if it doesn't exist
     */
    public function getConfiguration($name, $section = null)
    {
        $configValue = null;

        if ($section === null) {
            if (array_key_exists($name, $this->config)) {
                $configValue = $this->config[$name];
            }
        } else {
            if (array_key_exists($section, $this->config)) {
                $sectionSettings = $this->config[$section];
                if (array_key_exists($name, $sectionSettings)) {
                    $configValue = $sectionSettings[$name];
                }
            }
        }

        return $configValue;
    }
}

user=cacom
version = 2021608
status= true

function readFileConfig($UrlOrFilePath){

    $lines = file($UrlOrFilePath);
    $config = array();
    
    foreach ($lines as $l) {
        preg_match("/^(?P<key>.*)=(\s+)?(?P<value>.*)/", $l, $matches);
        if (isset($matches['key'])) {
            $config[trim($matches['key'])] = trim($matches['value']);
        }
    }

    return $config;
}

$urlRemote = 'http://example.com/default-config.conf';
$localConfigFile = "/home/domain/public_html/config.conf";
$localConfigFile2 = "config.conf";

print_r(readFileConfig($localConfigFile2));
print_r(readFileConfig($localConfigFile));
print_r(readFileConfig($urlRemote));

define('someprop', 0);

<?php
$server = "localhost";
$username = "root";
$password = "";
$db = "your_db_name";


$conn = mysqli_connect($server, $username, $password, $db);

if(!$conn){
   die('Error in connecting to server or Database');
 }
?>