Example of simple PHP application conversion to use https://github.com/indeyets/appserver-in-php

appserver.php

<?php
/**************************
 * aip variant of php file
 **************************/
 
class MyApp
{
    public function __invoke($context)
    {
        $output = '<h1>Hello world</h1>';

        if (isset($context['_GET']['name'])) {
            $name = $context['_GET']['name'];
            $output .= "<p>(hello to {$name} too</p>";
        }

        $headers = array(
            'Content-type', 'text/html; charset=utf-8',
            'Content-Length', strlen($output),
        );

        return array(200, $headers, $output);
    }
}

index.php

<?php
/**********************
 * usual php file
 **********************/
 
 header('Content-type: text/html; charset=utf-8');
 echo "<h1>Hello world</h1>";
 
 if (isset($_GET['name'])) {
     $name = $_GET['name']
     echo "<p>(hello to {$name} too</p>";
 }