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1 | <?php |
2 | |
3 | /** |
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4 | * global.php |
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5 | * |
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6 | * This includes code to update < 4.1.0 globals to the newer format |
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7 | * It also has some session register functions that work across various |
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8 | * php versions. |
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9 | * |
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10 | * @copyright © 1999-2006 The SquirrelMail Project Team |
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11 | * @license http://opensource.org/licenses/gpl-license.php GNU Public License |
31841a9e |
12 | * @version $Id$ |
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13 | * @package squirrelmail |
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14 | */ |
15 | |
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16 | /** |
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17 | */ |
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18 | define('SQ_INORDER',0); |
19 | define('SQ_GET',1); |
20 | define('SQ_POST',2); |
21 | define('SQ_SESSION',3); |
22 | define('SQ_COOKIE',4); |
23 | define('SQ_SERVER',5); |
24 | define('SQ_FORM',6); |
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25 | |
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26 | |
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27 | /** |
28 | * returns true if current php version is at mimimum a.b.c |
29 | * |
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30 | * Called: check_php_version(4,1) |
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31 | * @param int a major version number |
32 | * @param int b minor version number |
33 | * @param int c release number |
34 | * @return bool |
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35 | */ |
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36 | function check_php_version ($a = '0', $b = '0', $c = '0') |
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37 | { |
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38 | return version_compare ( PHP_VERSION, "$a.$b.$c", 'ge' ); |
9697c5ab |
39 | } |
40 | |
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41 | /** |
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42 | * returns true if the current internal SM version is at minimum a.b.c |
43 | * These are plain integer comparisons, as our internal version is |
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44 | * constructed by us, as an array of 3 ints. |
45 | * |
46 | * Called: check_sm_version(1,3,3) |
8b096f0a |
47 | * @param int a major version number |
48 | * @param int b minor version number |
49 | * @param int c release number |
50 | * @return bool |
97bdc607 |
51 | */ |
52 | function check_sm_version($a = 0, $b = 0, $c = 0) |
53 | { |
54 | global $SQM_INTERNAL_VERSION; |
55 | if ( !isset($SQM_INTERNAL_VERSION) || |
56 | $SQM_INTERNAL_VERSION[0] < $a || |
150c28d6 |
57 | ( $SQM_INTERNAL_VERSION[0] == $a && |
58 | $SQM_INTERNAL_VERSION[1] < $b) || |
59 | ( $SQM_INTERNAL_VERSION[0] == $a && |
60 | $SQM_INTERNAL_VERSION[1] == $b && |
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61 | $SQM_INTERNAL_VERSION[2] < $c ) ) { |
62 | return FALSE; |
62f7daa5 |
63 | } |
64 | return TRUE; |
97bdc607 |
65 | } |
66 | |
67 | |
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68 | /** |
69 | * Recursively strip slashes from the values of an array. |
70 | * @param array array the array to strip, passed by reference |
71 | * @return void |
72 | */ |
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73 | function sqstripslashes(&$array) { |
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74 | if(count($array) > 0) { |
75 | foreach ($array as $index=>$value) { |
76 | if (is_array($array[$index])) { |
77 | sqstripslashes($array[$index]); |
78 | } |
79 | else { |
80 | $array[$index] = stripslashes($value); |
81 | } |
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82 | } |
83 | } |
84 | } |
85 | |
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86 | /** |
87 | * Add a variable to the session. |
88 | * @param mixed $var the variable to register |
89 | * @param string $name the name to refer to this variable |
90 | * @return void |
91 | */ |
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92 | function sqsession_register ($var, $name) { |
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93 | |
94 | sqsession_is_active(); |
95 | |
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96 | $_SESSION["$name"] = $var; |
97 | |
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98 | session_register("$name"); |
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99 | } |
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100 | |
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101 | /** |
102 | * Delete a variable from the session. |
103 | * @param string $name the name of the var to delete |
104 | * @return void |
105 | */ |
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106 | function sqsession_unregister ($name) { |
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107 | |
108 | sqsession_is_active(); |
109 | |
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110 | unset($_SESSION[$name]); |
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111 | |
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112 | session_unregister("$name"); |
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113 | } |
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114 | |
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115 | /** |
116 | * Checks to see if a variable has already been registered |
117 | * in the session. |
118 | * @param string $name the name of the var to check |
119 | * @return bool whether the var has been registered |
120 | */ |
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121 | function sqsession_is_registered ($name) { |
122 | $test_name = &$name; |
123 | $result = false; |
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124 | |
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125 | if (isset($_SESSION[$test_name])) { |
126 | $result = true; |
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127 | } |
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128 | |
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129 | return $result; |
130 | } |
131 | |
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132 | /** |
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133 | * Search for the var $name in $_SESSION, $_POST, $_GET, $_COOKIE, or $_SERVER |
134 | * and set it in provided var. |
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135 | * |
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136 | * If $search is not provided, or if it is SQ_INORDER, it will search $_SESSION, |
137 | * then $_POST, then $_GET. If $search is SQ_FORM it will search $_POST and |
138 | * $_GET. Otherwise, use one of the defined constants to look for a var in one |
139 | * place specifically. |
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140 | * |
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141 | * Note: $search is an int value equal to one of the constants defined above. |
d1975c5b |
142 | * |
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143 | * Example: |
144 | * sqgetGlobalVar('username',$username,SQ_SESSION); |
145 | * // No quotes around last param, it's a constant - not a string! |
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146 | * |
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147 | * @param string name the name of the var to search |
148 | * @param mixed value the variable to return |
149 | * @param int search constant defining where to look |
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150 | * @param int typecast force variable to be cast to given type (please |
151 | * use SQ_TYPE_XXX constants or set to FALSE (default) |
152 | * to leave variable type unmolested) |
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153 | * @return bool whether variable is found. |
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154 | */ |
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155 | function sqgetGlobalVar($name, &$value, $search = SQ_INORDER, $default = NULL, $typecast = false) { |
156 | |
157 | $result = false; |
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158 | |
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159 | switch ($search) { |
62f7daa5 |
160 | /* we want the default case to be first here, |
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161 | so that if a valid value isn't specified, |
162 | all three arrays will be searched. */ |
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163 | default: |
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164 | case SQ_INORDER: // check session, post, get |
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165 | case SQ_SESSION: |
166 | if( isset($_SESSION[$name]) ) { |
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167 | $value = $_SESSION[$name]; |
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168 | $result = TRUE; |
169 | break; |
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170 | } elseif ( $search == SQ_SESSION ) { |
171 | break; |
172 | } |
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173 | case SQ_FORM: // check post, get |
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174 | case SQ_POST: |
175 | if( isset($_POST[$name]) ) { |
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176 | $value = $_POST[$name]; |
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177 | $result = TRUE; |
178 | break; |
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179 | } elseif ( $search == SQ_POST ) { |
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180 | break; |
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181 | } |
182 | case SQ_GET: |
183 | if ( isset($_GET[$name]) ) { |
184 | $value = $_GET[$name]; |
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185 | $result = TRUE; |
186 | break; |
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187 | } |
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188 | /* NO IF HERE. FOR SQ_INORDER CASE, EXIT after GET */ |
189 | break; |
190 | case SQ_COOKIE: |
191 | if ( isset($_COOKIE[$name]) ) { |
192 | $value = $_COOKIE[$name]; |
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193 | $result = TRUE; |
194 | break; |
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195 | } |
196 | break; |
197 | case SQ_SERVER: |
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198 | if ( isset($_SERVER[$name]) ) { |
199 | $value = $_SERVER[$name]; |
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200 | $result = TRUE; |
201 | break; |
d1975c5b |
202 | } |
203 | break; |
4cd8ae7d |
204 | } |
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205 | if ($result && $typecast) { |
206 | switch ($typecast) { |
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207 | case SQ_TYPE_INT: $value = (int) $value; break; |
208 | case SQ_TYPE_STRING: $value = (string) $value; break; |
209 | case SQ_TYPE_BOOL: $value = (bool) $value; break; |
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210 | default: break; |
211 | } |
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212 | } else if (!$result && !is_null($default)) { |
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213 | $value = $default; |
214 | } |
215 | return $result; |
4cd8ae7d |
216 | } |
217 | |
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218 | /** |
219 | * Deletes an existing session, more advanced than the standard PHP |
220 | * session_destroy(), it explicitly deletes the cookies and global vars. |
66c7cd3f |
221 | * |
222 | * WARNING: Older PHP versions have some issues with session management. |
223 | * See http://bugs.php.net/11643 (warning, spammed bug tracker) and |
224 | * http://bugs.php.net/13834. SID constant is not destroyed in PHP 4.1.2, |
225 | * 4.2.3 and maybe other versions. If you restart session after session |
226 | * is destroyed, affected PHP versions produce PHP notice. Bug should |
227 | * be fixed only in 4.3.0 |
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228 | */ |
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229 | function sqsession_destroy() { |
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230 | |
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231 | /* |
232 | * php.net says we can kill the cookie by setting just the name: |
233 | * http://www.php.net/manual/en/function.setcookie.php |
234 | * maybe this will help fix the session merging again. |
235 | * |
236 | * Changed the theory on this to kill the cookies first starting |
237 | * a new session will provide a new session for all instances of |
238 | * the browser, we don't want that, as that is what is causing the |
239 | * merging of sessions. |
240 | */ |
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241 | |
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242 | global $base_uri; |
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243 | |
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244 | if (isset($_COOKIE[session_name()])) sqsetcookie(session_name(), '', 0, $base_uri); |
245 | if (isset($_COOKIE['username'])) sqsetcookie('username','',0,$base_uri); |
246 | if (isset($_COOKIE['key'])) sqsetcookie('key','',0,$base_uri); |
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247 | |
248 | $sessid = session_id(); |
249 | if (!empty( $sessid )) { |
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250 | $_SESSION = array(); |
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251 | @session_destroy(); |
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252 | } |
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253 | } |
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254 | |
8b096f0a |
255 | /** |
281c3d5b |
256 | * Function to verify a session has been started. If it hasn't |
257 | * start a session up. php.net doesn't tell you that $_SESSION |
258 | * (even though autoglobal), is not created unless a session is |
259 | * started, unlike $_POST, $_GET and such |
260 | */ |
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261 | function sqsession_is_active() { |
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262 | $sessid = session_id(); |
263 | if ( empty( $sessid ) ) { |
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264 | sqsession_start(); |
281c3d5b |
265 | } |
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266 | } |
267 | |
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268 | /** |
269 | * Function to start the session and store the cookie with the session_id as |
270 | * HttpOnly cookie which means that the cookie isn't accessible by javascript |
271 | * (IE6 only) |
272 | */ |
273 | function sqsession_start() { |
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274 | global $base_uri; |
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275 | |
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276 | session_start(); |
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277 | $session_id = session_id(); |
278 | |
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279 | // session_starts sets the sessionid cookie buth without the httponly var |
280 | // setting the cookie again sets the httponly cookie attribute |
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281 | |
282 | // disable, @see sqsetcookie and php 5.1.2 |
283 | // sqsetcookie(session_name(),session_id(),false,$base_uri); |
3a1de9f1 |
284 | } |
285 | |
286 | |
287 | /** |
288 | * Set a cookie |
289 | * @param string $sName The name of the cookie. |
290 | * @param string $sValue The value of the cookie. |
291 | * @param int $iExpire The time the cookie expires. This is a Unix timestamp so is in number of seconds since the epoch. |
292 | * @param string $sPath The path on the server in which the cookie will be available on. |
293 | * @param string $sDomain The domain that the cookie is available. |
294 | * @param boolean $bSecure Indicates that the cookie should only be transmitted over a secure HTTPS connection. |
295 | * @param boolean $bHttpOnly Disallow JS to access the cookie (IE6 only) |
296 | * @return void |
297 | */ |
202bcbcc |
298 | function sqsetcookie($sName,$sValue,$iExpire=false,$sPath="",$sDomain="",$bSecure=false,$bHttpOnly=true,$bFlush=false) { |
299 | static $sCookieCache; |
300 | if (!isset($sCache)) { |
301 | $sCache = ''; |
302 | } |
303 | /** |
304 | * We have to send all cookies with one header call otherwise we loose cookies. |
305 | * In order to achieve that the sqsetcookieflush function calls this function with $bFlush = true. |
306 | * If that happens we send the cookie header. |
307 | */ |
308 | if ($bFlush) { |
09569b55 |
309 | // header($sCookieCache); |
202bcbcc |
310 | return; |
311 | } |
09569b55 |
312 | if (!$sName) return; |
313 | |
314 | // php 5.1.2 and 4.4.2 do not allow to send multiple headers at once. |
315 | // Because that's the only way to get this thing working we fallback to |
316 | // setcookie until we solved this |
317 | if ($iExpire===false) $iExpire = 0; |
318 | setcookie($sName, $sValue, $iExpire, $sPath); |
319 | return; |
202bcbcc |
320 | |
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321 | $sHeader = "Set-Cookie: $sName=$sValue"; |
322 | if ($sPath) { |
6f9fa51a |
323 | $sHeader .= "; path=$sPath"; |
3a1de9f1 |
324 | } |
6f9fa51a |
325 | if ($iExpire !== false) { |
3a1de9f1 |
326 | $sHeader .= "; Max-Age=$iExpire"; |
6f9fa51a |
327 | // php uses Expire header, also add the expire header |
a1ef1d05 |
328 | $sHeader .= "; expires=". gmdate('D, d-M-Y H:i:s T',$iExpire); |
3a1de9f1 |
329 | } |
330 | if ($sDomain) { |
331 | $sHeader .= "; Domain=$sDomain"; |
332 | } |
8ca9f662 |
333 | // TODO: IE for Mac (5.2) thinks that semicolon is part of cookie domain |
3a1de9f1 |
334 | if ($bSecure) { |
335 | $sHeader .= "; Secure"; |
336 | } |
337 | if ($bHttpOnly) { |
338 | $sHeader .= "; HttpOnly"; |
339 | } |
6f9fa51a |
340 | // $sHeader .= "; Version=1"; |
202bcbcc |
341 | $sCookieCache .= $sHeader ."\r\n"; |
09569b55 |
342 | //header($sHeader."\r\n"); |
202bcbcc |
343 | } |
344 | |
345 | /** |
346 | * Send the cookie header |
347 | * |
348 | * Cookies set with sqsetcookie will bet set after a sqsetcookieflush call. |
349 | * @return void |
350 | */ |
351 | function sqsetcookieflush() { |
352 | sqsetcookie('','','','','','','',true); |
353 | } |
354 | |
355 | /** |
356 | * session_regenerate_id replacement for PHP < 4.3.2 |
357 | * |
358 | * This code is borrowed from Gallery, session.php version 1.53.2.1 |
359 | */ |
360 | if (!function_exists('session_regenerate_id')) { |
361 | function make_seed() { |
362 | list($usec, $sec) = explode(' ', microtime()); |
363 | return (float)$sec + ((float)$usec * 100000); |
364 | } |
365 | |
366 | function php_combined_lcg() { |
367 | mt_srand(make_seed()); |
368 | $tv = gettimeofday(); |
369 | $lcg['s1'] = $tv['sec'] ^ (~$tv['usec']); |
370 | $lcg['s2'] = mt_rand(); |
371 | $q = (int) ($lcg['s1'] / 53668); |
372 | $lcg['s1'] = (int) (40014 * ($lcg['s1'] - 53668 * $q) - 12211 * $q); |
373 | if ($lcg['s1'] < 0) { |
374 | $lcg['s1'] += 2147483563; |
375 | } |
376 | $q = (int) ($lcg['s2'] / 52774); |
377 | $lcg['s2'] = (int) (40692 * ($lcg['s2'] - 52774 * $q) - 3791 * $q); |
378 | if ($lcg['s2'] < 0) { |
379 | $lcg['s2'] += 2147483399; |
380 | } |
381 | $z = (int) ($lcg['s1'] - $lcg['s2']); |
382 | if ($z < 1) { |
383 | $z += 2147483562; |
384 | } |
385 | return $z * 4.656613e-10; |
386 | } |
3a1de9f1 |
387 | |
202bcbcc |
388 | function session_regenerate_id() { |
389 | global $base_uri; |
390 | $tv = gettimeofday(); |
391 | sqgetGlobalVar('REMOTE_ADDR',$remote_addr,SQ_SERVER); |
392 | $buf = sprintf("%.15s%ld%ld%0.8f", $remote_addr, $tv['sec'], $tv['usec'], php_combined_lcg() * 10); |
393 | session_id(md5($buf)); |
394 | if (ini_get('session.use_cookies')) { |
395 | // at a later stage we use sqsetcookie. At this point just do |
396 | // what session_regenerate_id would do |
397 | setcookie(session_name(), session_id(), NULL, $base_uri); |
398 | } |
399 | return TRUE; |
400 | } |
3a1de9f1 |
401 | } |
7f62aaef |
402 | |
202bcbcc |
403 | |
7f62aaef |
404 | /** |
405 | * php_self |
406 | * |
407 | * Creates an URL for the page calling this function, using either the PHP global |
408 | * REQUEST_URI, or the PHP global PHP_SELF with QUERY_STRING added. Before 1.5.1 |
409 | * function was stored in function/strings.php. |
410 | * |
411 | * @return string the complete url for this page |
412 | * @since 1.2.3 |
413 | */ |
414 | function php_self () { |
415 | if ( sqgetGlobalVar('REQUEST_URI', $req_uri, SQ_SERVER) && !empty($req_uri) ) { |
416 | return $req_uri; |
417 | } |
418 | |
419 | if ( sqgetGlobalVar('PHP_SELF', $php_self, SQ_SERVER) && !empty($php_self) ) { |
420 | |
421 | // need to add query string to end of PHP_SELF to match REQUEST_URI |
422 | // |
423 | if ( sqgetGlobalVar('QUERY_STRING', $query_string, SQ_SERVER) && !empty($query_string) ) { |
424 | $php_self .= '?' . $query_string; |
425 | } |
426 | |
427 | return $php_self; |
428 | } |
429 | |
430 | return ''; |
431 | } |
aa201211 |
432 | |
433 | |
434 | /** |
8f32a0a3 |
435 | * Find files and/or directories in a given directory optionally |
436 | * limited to only those with the given file extension. If the |
437 | * directory is not found or cannot be opened, no error is generated; |
438 | * only an empty file list is returned. |
aa201211 |
439 | FIXME: do we WANT to throw an error or a notice or... or return FALSE? |
440 | * |
8f32a0a3 |
441 | * @param string $directory_path The path (relative or absolute) |
442 | * to the desired directory. |
443 | * @param string $extension The file extension filter (optional; |
444 | * default is to return all files (dirs). |
445 | * @param boolean $return_filenames_only When TRUE, only file/dir names |
aa201211 |
446 | * are returned, otherwise the |
447 | * $directory_path string is |
8f32a0a3 |
448 | * prepended to each file/dir in |
aa201211 |
449 | * the returned list (optional; |
8f32a0a3 |
450 | * default is filename/dirname only) |
451 | * @param boolean $include_directories When TRUE, directories are |
452 | * included (optional; default |
453 | * DO include directories). |
454 | * @param boolean $directories_only When TRUE, ONLY directories |
455 | * are included (optional; default |
456 | * is to include files too). |
457 | * @param boolean $separate_files_and_directories When TRUE, files and |
458 | * directories are returned |
459 | * in separate lists, so |
460 | * the return value is |
461 | * formatted as a two-element |
462 | * array with the two keys |
463 | * "FILES" and "DIRECTORIES", |
464 | * where corresponding values |
465 | * are lists of either all |
466 | * files or all directories |
467 | * (optional; default do not |
468 | * split up return array). |
469 | * |
aa201211 |
470 | * |
8f32a0a3 |
471 | * @return array The requested file/directory list(s). |
aa201211 |
472 | * |
473 | * @since 1.5.2 |
474 | * |
475 | */ |
8f32a0a3 |
476 | function list_files($directory_path, $extension='', $return_filenames_only=TRUE, |
477 | $include_directories=TRUE, $directories_only=FALSE, |
478 | $separate_files_and_directories=FALSE) { |
aa201211 |
479 | |
480 | $files = array(); |
8f32a0a3 |
481 | $directories = array(); |
aa201211 |
482 | |
483 | //FIXME: do we want to place security restrictions here like only allowing |
484 | // directories under SM_PATH? |
485 | // validate given directory |
486 | // |
487 | if (empty($directory_path) |
488 | || !is_dir($directory_path) |
489 | || !($DIR = opendir($directory_path))) { |
490 | return $files; |
491 | } |
492 | |
8f32a0a3 |
493 | |
494 | if (!empty($extension)) $extension = '.' . trim($extension, '.'); |
495 | $directory_path = rtrim($directory_path, '/'); |
496 | |
497 | |
aa201211 |
498 | // parse through the files |
499 | // |
aa201211 |
500 | while (($file = readdir($DIR)) !== false) { |
501 | |
502 | if ($file == '.' || $file == '..') continue; |
503 | |
8f32a0a3 |
504 | if (!empty($extension) |
505 | && strrpos($file, $extension) !== (strlen($file) - strlen($extension))) |
506 | continue; |
507 | |
508 | // only use is_dir() if we really need to (be as efficient as possible) |
509 | // |
510 | $is_dir = FALSE; |
511 | if (!$include_directories || $directories_only |
512 | || $separate_files_and_directories) { |
513 | if (is_dir($directory_path . '/' . $file)) { |
514 | if (!$include_directories) continue; |
515 | $is_dir = TRUE; |
516 | $directories[] = ($return_filenames_only |
517 | ? $file |
518 | : $directory_path . '/' . $file); |
519 | } |
520 | if ($directories_only) continue; |
521 | } |
522 | |
523 | if (!$separate_files_and_directories |
524 | || ($separate_files_and_directories && !$is_dir)) { |
aa201211 |
525 | $files[] = ($return_filenames_only |
8f32a0a3 |
526 | ? $file |
527 | : $directory_path . '/' . $file); |
aa201211 |
528 | } |
529 | |
530 | } |
531 | closedir($DIR); |
532 | |
8f32a0a3 |
533 | |
534 | if ($directories_only) return $directories; |
535 | if ($separate_files_and_directories) return array('FILES' => $files, |
536 | 'DIRECTORIES' => $directories); |
aa201211 |
537 | return $files; |
538 | |
539 | } |
540 | |
541 | |
542 | /** |
543 | * Print variable |
544 | * |
545 | * sm_print_r($some_variable, [$some_other_variable [, ...]]); |
546 | * |
547 | * Debugging function - does the same as print_r, but makes sure special |
548 | * characters are converted to htmlentities first. This will allow |
549 | * values like <some@email.address> to be displayed. |
550 | * The output is wrapped in <<pre>> and <</pre>> tags. |
551 | * Since 1.4.2 accepts unlimited number of arguments. |
552 | * @since 1.4.1 |
553 | * @return void |
554 | */ |
555 | function sm_print_r() { |
556 | ob_start(); // Buffer output |
557 | foreach(func_get_args() as $var) { |
558 | print_r($var); |
559 | echo "\n"; |
560 | // php has get_class_methods function that can print class methods |
561 | if (is_object($var)) { |
562 | // get class methods if $var is object |
563 | $aMethods=get_class_methods(get_class($var)); |
564 | // make sure that $aMethods is array and array is not empty |
565 | if (is_array($aMethods) && $aMethods!=array()) { |
566 | echo "Object methods:\n"; |
567 | foreach($aMethods as $method) { |
568 | echo '* ' . $method . "\n"; |
569 | } |
570 | } |
571 | echo "\n"; |
572 | } |
573 | } |
574 | $buffer = ob_get_contents(); // Grab the print_r output |
575 | ob_end_clean(); // Silently discard the output & stop buffering |
576 | print '<div align="left"><pre>'; |
577 | print htmlentities($buffer); |
578 | print '</pre></div>'; |
579 | } |
580 | |
581 | |