Also do this for php

Author: Edward Muller

server.php

@@ -3,8 +3,13 @@
     isset($_SERVER['argv'][0]) && $_SERVER['argv'][0] === 'server.php';
 
 if($scriptInvokedFromCli) {
-    echo 'starting server on port 3000' . PHP_EOL;
-    exec('php -S localhost:3000 -t public server.php');
+    $port = getenv('PORT');
+    if (empty($port)) {
+        $port = "3000";
+    }
+
+    echo 'starting server on port '. $port . PHP_EOL;
+    exec('php -S localhost:'. $port . ' -t public server.php');
 } else {
     return routeRequest();
 }