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1 | <?php |
2 | |
3 | /** |
4 | * globals.php |
5 | * |
6 | * Copyright (c) 1999-2002 The SquirrelMail Project Team |
7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This includes code to update < 4.1.0 globals to the newer format |
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10 | * It also has some session register functions that work across various |
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11 | * php versions. |
12 | * |
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13 | * $Id$ |
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14 | */ |
15 | |
16 | |
17 | /* convert old-style superglobals to current method |
18 | * this is executed if you are running PHP 4.0.x. |
19 | * it is run via a require_once directive in validate.php |
20 | * and redirect.php. Patch submitted by Ray Black. |
21 | */ |
22 | |
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23 | if ( !check_php_version(4,1) ) { |
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24 | global $_COOKIE, $_ENV, $_FILES, $_GET, $_POST, $_SERVER, $_SESSION; |
25 | global $HTTP_COOKIE_VARS, $HTTP_ENV_VARS, $HTTP_POST_FILES, $HTTP_GET_VARS, |
26 | $HTTP_POST_VARS, $HTTP_SERVER_VARS, $HTTP_SESSION_VARS; |
27 | $_COOKIE =& $HTTP_COOKIE_VARS; |
28 | $_ENV =& $HTTP_ENV_VARS; |
29 | $_FILES =& $HTTP_POST_FILES; |
30 | $_GET =& $HTTP_GET_VARS; |
31 | $_POST =& $HTTP_POST_VARS; |
32 | $_SERVER =& $HTTP_SERVER_VARS; |
33 | $_SESSION =& $HTTP_SESSION_VARS; |
34 | } |
35 | |
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36 | /* if running with magic_quotes_gpc then strip the slashes |
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37 | from POST and GET global arrays */ |
38 | |
39 | if (get_magic_quotes_gpc()) { |
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40 | sqstripslashes($_GET); |
41 | sqstripslashes($_POST); |
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42 | } |
43 | |
44 | /* strip any tags added to the url from PHP_SELF. |
45 | This fixes hand crafted url XXS expoits for any |
46 | page that uses PHP_SELF as the FORM action */ |
47 | |
48 | strip_tags($_SERVER['PHP_SELF']); |
49 | |
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50 | /* returns true if current php version is at mimimum a.b.c */ |
51 | function check_php_version ($a = '0', $b = '0', $c = '0') |
52 | { |
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53 | global $SQ_PHP_VERSION; |
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54 | |
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55 | if(!isset($SQ_PHP_VERSION)) |
56 | $SQ_PHP_VERSION = str_pad( preg_replace('/\D/','', PHP_VERSION), 3, '0'); |
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57 | |
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58 | return $SQ_PHP_VERSION >= ($a.$b.$c); |
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59 | } |
60 | |
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61 | /* recursively strip slashes from the values of an array */ |
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62 | function sqstripslashes(&$array) { |
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63 | if(count($array) > 0) { |
64 | foreach ($array as $index=>$value) { |
65 | if (is_array($array[$index])) { |
66 | sqstripslashes($array[$index]); |
67 | } |
68 | else { |
69 | $array[$index] = stripslashes($value); |
70 | } |
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71 | } |
72 | } |
73 | } |
74 | |
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75 | function sqsession_register ($var, $name) { |
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76 | if ( !check_php_version(4,1) ) { |
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77 | global $HTTP_SESSION_VARS; |
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78 | $HTTP_SESSION_VARS[$name] = $var; |
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79 | } |
80 | else { |
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81 | $_SESSION["$name"] = $var; |
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82 | } |
83 | } |
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84 | |
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85 | function sqsession_unregister ($name) { |
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86 | if ( !check_php_version(4,1) ) { |
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87 | global $HTTP_SESSION_VARS; |
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88 | unset($HTTP_SESSION_VARS[$name]); |
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89 | } |
90 | else { |
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91 | unset($_SESSION[$name]); |
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92 | } |
93 | } |
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94 | |
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95 | function sqsession_is_registered ($name) { |
96 | $test_name = &$name; |
97 | $result = false; |
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98 | if ( !check_php_version(4,1) ) { |
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99 | global $HTTP_SESSION_VARS; |
100 | if (isset($HTTP_SESSION_VARS[$test_name])) { |
101 | $result = true; |
102 | } |
103 | } |
104 | else { |
105 | if (isset($_SESSION[$test_name])) { |
106 | $result = true; |
107 | } |
108 | } |
109 | return $result; |
110 | } |
111 | |
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112 | |
113 | /** |
114 | * Search for the var $name in $_SESSION, $_POST, $_GET |
115 | * (in that order) and register it as a global var. |
116 | */ |
117 | function sqextractGlobalVar ($name) { |
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118 | if ( !check_php_version(4,1) ) { |
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119 | global $_SESSION, $_GET, $_POST; |
120 | } |
121 | global $$name; |
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122 | if( isset($_SESSION[$name]) ) { |
123 | $$name = $_SESSION[$name]; |
124 | } |
125 | if( isset($_POST[$name]) ) { |
126 | $$name = $_POST[$name]; |
127 | } |
128 | else if ( isset($_GET[$name]) ) { |
129 | $$name = $_GET[$name]; |
130 | } |
131 | } |
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132 | |
133 | function sqsession_destroy() { |
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134 | global $base_uri; |
135 | |
136 | /* start session to be able to destroy it later */ |
137 | session_start(); |
138 | |
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139 | if ( !check_php_version(4,1) ) { |
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140 | global $HTTP_SESSION_VARS; |
141 | $HTTP_SESSION_VARS = array(); |
142 | } |
143 | else { |
144 | $_SESSION = array(); |
145 | } |
146 | |
147 | /* |
148 | * now reset cookies to 5 seconds ago to delete from browser |
149 | */ |
150 | |
151 | @session_destroy(); |
152 | $cookie_params = session_get_cookie_params(); |
153 | setcookie(session_name(), '', time() - 5, $cookie_params['path'], |
154 | $cookie_params['domain']); |
155 | setcookie('username', '', time() - 5, $base_uri); |
156 | setcookie('key', '', time() - 5 , $base_uri); |
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157 | } |
158 | |
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159 | ?> |