How to get base url in php-view

consider my current project url is http://localhost/myproject/ i want to get this url in every template in php-view how to get it

You can set template variables in the PhpRenderer instance, either when constructing the instance of afterwards using setAttributes and addAttribute.

For example using the constructor:

$app = new App([
    // set the baseUrl variable at construction time
    'renderer' => new PhpRenderer('./templates', [
        'baseUrl' => '/myproject/'

The variable baseUrl can then be used in the templates rendered with the renderer, e.g.:

<p>Back to the <a href="<?php print htmlspecialchars($baseUrl); ?>">homepage</a>.</p>

First you need to add this extension to your twig container:

// Twig
$container['view'] = function ( $c ) {
    $view = new \Slim\Views\Twig( $c['settings']['view']['template_path'], $c['settings']['view']['twig'] );
    // extension for path_for and base_url
    $view->addExtension( new Slim\Views\TwigExtension( $c['router'], $c['request']->getUri() ) );
    return $view;

Then you can use it in your views like this:

<link rel="shortcut icon" href="{{ base_url() }}/favicon.ico" type='image/x-icon'>