Simple text template parser for making configs

config-template.txt

<?php
define('DB_HOSTNAME', '{{hostname}}');
define('DB_USERNAME', '{{username}}');
define('DB_PASSWORD', '{{password}}');
define('DB_DATABASE', '{{database}}');

install.php

<?php

// DO ALL SORTS OF MAGIC HERE ......

$configTemplate = file_get_contents('config-template.txt');

$data = [
    'hostname' => 'localhost',
    'username' => 'dbuser',
    'password' => 'dbpass',
    'database' => 'dbname'
];
$configs = parseTemplate($configTemplate, $data);
file_put_contents('config.php', $configs);

// CONTINUE WITH WHATEVER SORTS OF MAGIC HERE ......

parser.php

<?php
function parseTemplate($template, $data)
{
    return preg_replace_callback('/{{(\w+)}}/', function($match) use ($data) {
        return $data[$match[1]];
   }, $template);
}