<?php

/**
 * @file
 * Handles integration of PHP templates with the Drupal theme system.
 */

use Drupal\Core\Extension\Extension;

/**
 * Implements hook_init().
 */
function phptemplate_init(Extension $theme) {
  $theme->load();
}

/**
 * Implements hook_theme().
 */
function phptemplate_theme($existing, $type, $theme, $path) {
  $templates = drupal_find_theme_functions($existing, array($theme));
  $templates += drupal_find_theme_templates($existing, '.tpl.php', $path);
  return $templates;
}

/**
 * Implements hook_extension().
 */
function phptemplate_extension() {
  return '.tpl.php';
}

/**
 * Implements hook_render_template().
 *
 * Renders a system default template, which is essentially a PHP template.
 *
 * @param $template_file
 *   The filename of the template to render.
 * @param $variables
 *   A keyed array of variables that will appear in the output.
 *
 * @return
 *   The output generated by the template.
 */
function phptemplate_render_template($template_file, $variables) {
  // Extract the variables to a local namespace
  extract($variables, EXTR_SKIP);

  // Start output buffering
  ob_start();

  // Include the template file
  include \Drupal::root() . '/' . $template_file;

  // End buffering and return its contents
  return ob_get_clean();
}