CodeIgniter Simple and Secure Twig

This package provides simple Twig integration for CodeIgniter 3.x.

Folder Structure

codeigniter/
└── application/
    └── libraries/
        └── Twig.php

Requirements

PHP 5.4.0 or later
Twig 1.22.0 or later (Also, simply checked with Twig v2.x)

Installation

With Composer

$ cd /path/to/codeigniter/
$ composer require kenjis/codeigniter-ss-twig

Install libraries/Twig.php to your CodeIgniter application folder:

$ php vendor/kenjis/codeigniter-ss-twig/install.php

Above command always overwrites exisiting files.
You must run it at CodeIgniter project root folder.

Without Composer

Download the latest Twig v1.x: https://github.com/twigphp/Twig/releases

Unzip and install to application/third_party folder.

Download the latest codeigniter-ss-twig: https://github.com/kenjis/codeigniter-ss-twig/releases

Unzip and copy codeigniter-ss-twig/libraries/Twig.php to application/libraries folder.

Remove comment marks below and fix the path for Autoloader.php:

--- a/libraries/Twig.php
+++ b/libraries/Twig.php
@@ -9,10 +9,8 @@
  */
 
 // If you don't use Composer, uncomment below
-/*
 require_once APPPATH . 'third_party/Twig-1.xx.x/lib/Twig/Autoloader.php';
 Twig_Autoloader::register();
-*/
 
 class Twig
 {

Usage

Loading Twig Library

$this->load->library('twig');

You can override the default configuration:

$config = [
	'paths' => ['/path/to/twig/templates', VIEWPATH],
	'cache' => '/path/to/twig/cache',
];
$this->load->library('twig', $config);

Rendering Templates

Render Twig template and output to browser:

$this->twig->display('welcome', $data);

Above code renders views/welcome.twig.

Note: I've changed the method name from render() to display(). Now render() method returns string only.

Render Twig template:

$output = $this->twig->render('welcome', $data);

Above code renders views/welcome.twig.

Adding a Global Variable

$this->twig->addGlobal('sitename', 'My Awesome Site');

Getting Twig_Environment Instance

$twig = $this->twig->getTwig();

Supported CodeIgniter Helpers

base_url
site_url
anchor
form_open
form_close
form_error
form_hidden
set_value

Some helpers are added the functionality of auto-escaping for security.

Adding Your Functions

You can add your functions with configuration:

$config = [
	'functions' => ['my_helper'],
	'functions_safe' => ['my_safe_helper'],
];
$this->load->library('twig', $config);

If your function explicitly outputs HTML code, you will want the raw output to be printed. In such a case, use functions_safe, and you have to make sure the output of the function is XSS free.

Reference

Documentation

http://twig.sensiolabs.org/documentation

Samples

How to Run Tests

$ cd codeigniter-ss-twig
$ composer install
$ phpunit

Other Twig Implementations for CodeIgniter 3.x

https://github.com/davidsosavaldes/Attire

bradystone/codeigniter-ss-twig