psr0.module in psr0 autoloader 7

Registers a simple PSR-4 autoloader.

File

psr0.module

<?php

/**
 * @file
 * Registers a simple PSR-4 autoloader.
 */

// This is needed for drupal_get_path().
require_once DRUPAL_ROOT . '/includes/common.inc';
spl_autoload_register('psr0_autoloader');

/**
 * Get the path to project $name.
 *
 * Guesses whether this project is a module or profile.
 *
 * @param string $name
 *   Name of the project.
 * @param bool $tests
 *   Whether we are looking for the Tests sub-namespace.
 *
 * @return array
 *   Array of possible path prefixes for this project name.
 */
function _psr0_paths_for_name($name, $tests) {

  // Use the advanced drupal_static() pattern, since this is called very often.
  $cname = $tests ? "main:{$name}" : "tests:{$name}";
  static $paths;
  if (!isset($paths)) {
    $paths =& drupal_static(__FUNCTION__, array());
  }
  if (isset($paths[$cname])) {
    return $paths[$cname];
  }
  $modules = system_list('module_enabled');
  if (isset($modules[$name])) {
    $paths[$cname] = array();
    $module_path = DRUPAL_ROOT . '/' . dirname($modules[$name]->filename);
    if ($tests) {
      if (file_exists($module_path . '/lib/Tests/')) {
        $paths[$cname][] = $module_path . '/lib/Tests/';
      }
      if (file_exists($module_path . '/src/Tests/')) {
        $paths[$cname][] = $module_path . '/src/Tests/';
      }
      $module_path .= '/tests';
    }
    if (file_exists($module_path . '/lib/')) {
      $paths[$cname][] = $module_path . '/lib/';
    }
    if (file_exists($module_path . '/src/')) {
      $paths[$cname][] = $module_path . '/src/';
    }
    return $paths[$cname];
  }
  return array();
}

/**
 * An spl class autoloader function implementing PSR-4.
 *
 * Includes the class definition of $fq_class if it can be found via PSR-4.
 *
 * @param string $fq_class
 *   A fully qualified class name.
 */
function psr0_autoloader($fq_class) {
  $parts = explode('\\', $fq_class, 4);
  $cnt = count($parts);

  // Do nothing if this doesn't look like a PSR-4 class name.
  if ($cnt < 3 || $parts[0] != 'Drupal') {
    return;
  }
  $project_name = $parts[1];
  $tests = $parts[2] == 'Tests' && $cnt == 4;
  $class = $tests ? $parts[3] : implode('\\', array_slice($parts, 2));
  $paths = _psr0_paths_for_name($project_name, $tests);
  $file_part = strtr($class, '\\', '/') . '.php';
  foreach ($paths as $p) {
    $file = $p . $file_part;
    if (file_exists($file)) {
      require_once $file;
      return;
    }
  }
}

/**
 * Implements hook_boot().
 *
 * Intentionally left blank!
 * This tells Drupal that it has to include this module even before invoking
 * hook_boot().
 */
function psr0_boot() {
}

Functions

Name	Description
psr0_autoloader	An spl class autoloader function implementing PSR-4.
psr0_boot	Implements hook_boot().
_psr0_paths_for_name	Get the path to project $name.