1<?php
2
3/**
4 * Autoloader Class
5 *
6 *  PHP Version 7
7 *
8 * @file      CAS/Autoload.php
9 * @category  Authentication
10 * @package   SimpleCAS
11 * @author    Brett Bieber <brett.bieber@gmail.com>
12 * @copyright 2008 Regents of the University of Nebraska
13 * @license   http://www1.unl.edu/wdn/wiki/Software_License BSD License
14 * @link      http://code.google.com/p/simplecas/
15 **/
16
17/**
18 * Autoload a class
19 *
20 * @param string $class Classname to load
21 *
22 * @return bool
23 */
24function CAS_autoload($class)
25{
26    // Static to hold the Include Path to CAS
27    static $include_path;
28    // Check only for CAS classes
29    if (substr($class, 0, 4) !== 'CAS_' && substr($class, 0, 7) !== 'PhpCas\\') {
30        return false;
31    }
32
33    // Setup the include path if it's not already set from a previous call
34    if (empty($include_path)) {
35        $include_path = array(dirname(__DIR__));
36    }
37
38    // Declare local variable to store the expected full path to the file
39    foreach ($include_path as $path) {
40        $class_path = str_replace('_', DIRECTORY_SEPARATOR, $class);
41        // PhpCas namespace mapping
42        if (substr($class_path, 0, 7) === 'PhpCas\\') {
43            $class_path = 'CAS' . DIRECTORY_SEPARATOR . substr($class_path, 7);
44        }
45
46        $file_path = $path . DIRECTORY_SEPARATOR . $class_path . '.php';
47        $fp = @fopen($file_path, 'r', true);
48        if ($fp) {
49            fclose($fp);
50            include $file_path;
51            if (!class_exists($class, false) && !interface_exists($class, false)) {
52                die(
53                    new Exception(
54                        'Class ' . $class . ' was not present in ' .
55                        $file_path .
56                        ' [CAS_autoload]'
57                    )
58                );
59            }
60            return true;
61        }
62    }
63
64    $e = new Exception(
65        'Class ' . $class . ' could not be loaded from ' .
66        $file_path . ', file does not exist (Path="'
67        . implode(':', $include_path) .'") [CAS_autoload]'
68    );
69    $trace = $e->getTrace();
70    if (isset($trace[2]) && isset($trace[2]['function'])
71        && in_array($trace[2]['function'], array('class_exists', 'interface_exists', 'trait_exists'))
72    ) {
73        return false;
74    }
75    if (isset($trace[1]) && isset($trace[1]['function'])
76        && in_array($trace[1]['function'], array('class_exists', 'interface_exists', 'trait_exists'))
77    ) {
78        return false;
79    }
80    die ((string) $e);
81}
82
83// Set up autoload if not already configured by composer.
84if (!class_exists('CAS_Client'))
85{
86    trigger_error('phpCAS autoloader is deprecated. Install phpCAS using composer instead.', E_USER_DEPRECATED);
87    spl_autoload_register('CAS_autoload');
88    if (function_exists('__autoload')
89        && !in_array('__autoload', spl_autoload_functions())
90    ) {
91        // __autoload() was being used, but now would be ignored, add
92        // it to the autoload stack
93        spl_autoload_register('__autoload');
94    }
95}
96