xref: /dokuwiki/inc/init.php (revision 23735ba4c5021df9ab8c1b4a0e8322cebdaf5931) 
1<?php
2/**
3 * Initialize some defaults needed for DokuWiki
4 */
5
6// start timing Dokuwiki execution
7function delta_time($start=0) {
8    return microtime(true)-((float)$start);
9}
10define('DOKU_START_TIME', delta_time());
11
12global $config_cascade;
13$config_cascade = array();
14
15// if available load a preload config file
16$preload = fullpath(dirname(__FILE__)).'/preload.php';
17if (@file_exists($preload)) include($preload);
18
19// define the include path
20if(!defined('DOKU_INC')) define('DOKU_INC',fullpath(dirname(__FILE__).'/../').'/');
21
22// define Plugin dir
23if(!defined('DOKU_PLUGIN'))  define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
24
25// define config path (packagers may want to change this to /etc/dokuwiki/)
26if(!defined('DOKU_CONF')) define('DOKU_CONF',DOKU_INC.'conf/');
27
28// check for error reporting override or set error reporting to sane values
29if (!defined('DOKU_E_LEVEL') && @file_exists(DOKU_CONF.'report_e_all')) {
30    define('DOKU_E_LEVEL', E_ALL);
31}
32if (!defined('DOKU_E_LEVEL')) {
33    if(defined('E_DEPRECATED')){ // since php 5.3
34        error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
35    }else{
36        error_reporting(E_ALL ^ E_NOTICE);
37    }
38} else {
39    error_reporting(DOKU_E_LEVEL);
40}
41
42// init memory caches
43global $cache_revinfo;
44       $cache_revinfo = array();
45global $cache_wikifn;
46       $cache_wikifn = array();
47global $cache_cleanid;
48       $cache_cleanid = array();
49global $cache_authname;
50       $cache_authname = array();
51global $cache_metadata;
52       $cache_metadata = array();
53
54// always include 'inc/config_cascade.php'
55// previously in preload.php set fields of $config_cascade will be merged with the defaults
56include(DOKU_INC.'inc/config_cascade.php');
57
58//prepare config array()
59global $conf;
60$conf = array();
61
62// load the global config file(s)
63foreach (array('default','local','protected') as $config_group) {
64    if (empty($config_cascade['main'][$config_group])) continue;
65    foreach ($config_cascade['main'][$config_group] as $config_file) {
66        if (@file_exists($config_file)) {
67            include($config_file);
68        }
69    }
70}
71
72//prepare language array
73global $lang;
74$lang = array();
75
76//load the language files
77require_once(DOKU_INC.'inc/lang/en/lang.php');
78if ( $conf['lang'] && $conf['lang'] != 'en' ) {
79    require_once(DOKU_INC.'inc/lang/'.$conf['lang'].'/lang.php');
80}
81
82//prepare license array()
83global $license;
84$license = array();
85
86// load the license file(s)
87foreach (array('default','local') as $config_group) {
88    if (empty($config_cascade['license'][$config_group])) continue;
89    foreach ($config_cascade['license'][$config_group] as $config_file) {
90        if(@file_exists($config_file)){
91            include($config_file);
92        }
93    }
94}
95
96// set timezone (as in pre 5.3.0 days)
97date_default_timezone_set(@date_default_timezone_get());
98
99// define baseURL
100if(!defined('DOKU_REL')) define('DOKU_REL',getBaseURL(false));
101if(!defined('DOKU_URL')) define('DOKU_URL',getBaseURL(true));
102if(!defined('DOKU_BASE')){
103    if($conf['canonical']){
104        define('DOKU_BASE',DOKU_URL);
105    }else{
106        define('DOKU_BASE',DOKU_REL);
107    }
108}
109
110// define whitespace
111if(!defined('DOKU_LF')) define ('DOKU_LF',"\n");
112if(!defined('DOKU_TAB')) define ('DOKU_TAB',"\t");
113
114// define cookie and session id, append server port when securecookie is configured FS#1664
115if (!defined('DOKU_COOKIE')) define('DOKU_COOKIE', 'DW'.md5(DOKU_REL.(($conf['securecookie'])?$_SERVER['SERVER_PORT']:'')));
116
117
118// define main script
119if(!defined('DOKU_SCRIPT')) define('DOKU_SCRIPT','doku.php');
120
121// define Template baseURL
122if(!defined('DOKU_TPL')) define('DOKU_TPL',
123        DOKU_BASE.'lib/tpl/'.$conf['template'].'/');
124
125// define real Template directory
126if(!defined('DOKU_TPLINC')) define('DOKU_TPLINC',
127        DOKU_INC.'lib/tpl/'.$conf['template'].'/');
128
129// make session rewrites XHTML compliant
130@ini_set('arg_separator.output', '&amp;');
131
132// make sure global zlib does not interfere FS#1132
133@ini_set('zlib.output_compression', 'off');
134
135// increase PCRE backtrack limit
136@ini_set('pcre.backtrack_limit', '20971520');
137
138// enable gzip compression if supported
139$conf['gzip_output'] &= (strpos($_SERVER['HTTP_ACCEPT_ENCODING'],'gzip') !== false);
140if ($conf['gzip_output'] &&
141        !defined('DOKU_DISABLE_GZIP_OUTPUT') &&
142        function_exists('ob_gzhandler')) {
143    ob_start('ob_gzhandler');
144}
145
146// init session
147if (!headers_sent() && !defined('NOSESSION')){
148    session_name("DokuWiki");
149    $cookieDir = empty($conf['cookiedir']) ? DOKU_REL : $conf['cookiedir'];
150    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
151        session_set_cookie_params(0,$cookieDir,'',($conf['securecookie'] && is_ssl()),true);
152    }else{
153        session_set_cookie_params(0,$cookieDir,'',($conf['securecookie'] && is_ssl()));
154    }
155    session_start();
156
157    // load left over messages
158    if(isset($_SESSION[DOKU_COOKIE]['msg'])){
159        $MSG = $_SESSION[DOKU_COOKIE]['msg'];
160        unset($_SESSION[DOKU_COOKIE]['msg']);
161    }
162}
163
164// kill magic quotes
165if (get_magic_quotes_gpc() && !defined('MAGIC_QUOTES_STRIPPED')) {
166    if (!empty($_GET))    remove_magic_quotes($_GET);
167    if (!empty($_POST))   remove_magic_quotes($_POST);
168    if (!empty($_COOKIE)) remove_magic_quotes($_COOKIE);
169    if (!empty($_REQUEST)) remove_magic_quotes($_REQUEST);
170    @ini_set('magic_quotes_gpc', 0);
171    define('MAGIC_QUOTES_STRIPPED',1);
172}
173@set_magic_quotes_runtime(0);
174@ini_set('magic_quotes_sybase',0);
175
176// don't let cookies ever interfere with request vars
177$_REQUEST = array_merge($_GET,$_POST);
178
179// we don't want a purge URL to be digged
180if(isset($_REQUEST['purge']) && $_SERVER['HTTP_REFERER']) unset($_REQUEST['purge']);
181
182// disable gzip if not available
183if($conf['compression'] == 'bz2' && !function_exists('bzopen')){
184    $conf['compression'] = 'gz';
185}
186if($conf['compression'] == 'gz' && !function_exists('gzopen')){
187    $conf['compression'] = 0;
188}
189
190// fix dateformat for upgraders
191if(strpos($conf['dformat'],'%') === false){
192    $conf['dformat'] = '%Y/%m/%d %H:%M';
193}
194
195// precalculate file creation modes
196init_creationmodes();
197
198// make real paths and check them
199init_paths();
200init_files();
201
202// setup plugin controller class (can be overwritten in preload.php)
203$plugin_types = array('admin','syntax','action','renderer', 'helper');
204global $plugin_controller_class, $plugin_controller;
205if (empty($plugin_controller_class)) $plugin_controller_class = 'Doku_Plugin_Controller';
206
207// load libraries
208require_once(DOKU_INC.'inc/load.php');
209
210// initialize plugin controller
211$plugin_controller = new $plugin_controller_class();
212
213// initialize the event handler
214global $EVENT_HANDLER;
215$EVENT_HANDLER = new Doku_Event_Handler();
216
217// setup authentication system
218if (!defined('NOSESSION')) {
219    auth_setup();
220}
221
222// setup mail system
223mail_setup();
224
225/**
226 * Checks paths from config file
227 */
228function init_paths(){
229    global $conf;
230
231    $paths = array('datadir'   => 'pages',
232            'olddir'    => 'attic',
233            'mediadir'  => 'media',
234            'mediaolddir' => 'media_attic',
235            'metadir'   => 'meta',
236            'mediametadir' => 'media_meta',
237            'cachedir'  => 'cache',
238            'indexdir'  => 'index',
239            'lockdir'   => 'locks',
240            'tmpdir'    => 'tmp');
241
242    foreach($paths as $c => $p){
243        if(empty($conf[$c]))  $conf[$c] = $conf['savedir'].'/'.$p;
244        $conf[$c]             = init_path($conf[$c]);
245        if(empty($conf[$c]))  nice_die("The $c ('$p') does not exist, isn't accessible or writable.
246                You should check your config and permission settings.
247                Or maybe you want to <a href=\"install.php\">run the
248                installer</a>?");
249    }
250
251    // path to old changelog only needed for upgrading
252    $conf['changelog_old'] = init_path((isset($conf['changelog']))?($conf['changelog']):($conf['savedir'].'/changes.log'));
253    if ($conf['changelog_old']=='') { unset($conf['changelog_old']); }
254    // hardcoded changelog because it is now a cache that lives in meta
255    $conf['changelog'] = $conf['metadir'].'/_dokuwiki.changes';
256    $conf['media_changelog'] = $conf['metadir'].'/_media.changes';
257}
258
259/**
260 * Checks the existance of certain files and creates them if missing.
261 */
262function init_files(){
263    global $conf;
264
265    $files = array($conf['indexdir'].'/page.idx');
266
267    foreach($files as $file){
268        if(!@file_exists($file)){
269            $fh = @fopen($file,'a');
270            if($fh){
271                fclose($fh);
272                if($conf['fperm']) chmod($file, $conf['fperm']);
273            }else{
274                nice_die("$file is not writable. Check your permissions settings!");
275            }
276        }
277    }
278
279    # create title index (needs to have same length as page.idx)
280    /*
281    $file = $conf['indexdir'].'/title.idx';
282    if(!@file_exists($file)){
283        $pages = file($conf['indexdir'].'/page.idx');
284        $pages = count($pages);
285        $fh = @fopen($file,'a');
286        if($fh){
287            for($i=0; $i<$pages; $i++){
288                fwrite($fh,"\n");
289            }
290            fclose($fh);
291        }else{
292            nice_die("$file is not writable. Check your permissions settings!");
293        }
294    }
295    */
296}
297
298/**
299 * Returns absolute path
300 *
301 * This tries the given path first, then checks in DOKU_INC.
302 * Check for accessability on directories as well.
303 *
304 * @author Andreas Gohr <andi@splitbrain.org>
305 */
306function init_path($path){
307    // check existance
308    $p = fullpath($path);
309    if(!@file_exists($p)){
310        $p = fullpath(DOKU_INC.$path);
311        if(!@file_exists($p)){
312            return '';
313        }
314    }
315
316    // check writability
317    if(!@is_writable($p)){
318        return '';
319    }
320
321    // check accessability (execute bit) for directories
322    if(@is_dir($p) && !@file_exists("$p/.")){
323        return '';
324    }
325
326    return $p;
327}
328
329/**
330 * Sets the internal config values fperm and dperm which, when set,
331 * will be used to change the permission of a newly created dir or
332 * file with chmod. Considers the influence of the system's umask
333 * setting the values only if needed.
334 */
335function init_creationmodes(){
336    global $conf;
337
338    // Legacy support for old umask/dmask scheme
339    unset($conf['dmask']);
340    unset($conf['fmask']);
341    unset($conf['umask']);
342    unset($conf['fperm']);
343    unset($conf['dperm']);
344
345    // get system umask, fallback to 0 if none available
346    $umask = @umask();
347    if(!$umask) $umask = 0000;
348
349    // check what is set automatically by the system on file creation
350    // and set the fperm param if it's not what we want
351    $auto_fmode = 0666 & ~$umask;
352    if($auto_fmode != $conf['fmode']) $conf['fperm'] = $conf['fmode'];
353
354    // check what is set automatically by the system on file creation
355    // and set the dperm param if it's not what we want
356    $auto_dmode = $conf['dmode'] & ~$umask;
357    if($auto_dmode != $conf['dmode']) $conf['dperm'] = $conf['dmode'];
358}
359
360/**
361 * remove magic quotes recursivly
362 *
363 * @author Andreas Gohr <andi@splitbrain.org>
364 */
365function remove_magic_quotes(&$array) {
366    foreach (array_keys($array) as $key) {
367        // handle magic quotes in keynames (breaks order)
368        $sk = stripslashes($key);
369        if($sk != $key){
370            $array[$sk] = $array[$key];
371            unset($array[$key]);
372            $key = $sk;
373        }
374
375        // do recursion if needed
376        if (is_array($array[$key])) {
377            remove_magic_quotes($array[$key]);
378        }else {
379            $array[$key] = stripslashes($array[$key]);
380        }
381    }
382}
383
384/**
385 * Returns the full absolute URL to the directory where
386 * DokuWiki is installed in (includes a trailing slash)
387 *
388 * @author Andreas Gohr <andi@splitbrain.org>
389 */
390function getBaseURL($abs=null){
391    global $conf;
392    //if canonical url enabled always return absolute
393    if(is_null($abs)) $abs = $conf['canonical'];
394
395    if($conf['basedir']){
396        $dir = $conf['basedir'];
397    }elseif(substr($_SERVER['SCRIPT_NAME'],-4) == '.php'){
398        $dir = dirname($_SERVER['SCRIPT_NAME']);
399    }elseif(substr($_SERVER['PHP_SELF'],-4) == '.php'){
400        $dir = dirname($_SERVER['PHP_SELF']);
401    }elseif($_SERVER['DOCUMENT_ROOT'] && $_SERVER['SCRIPT_FILENAME']){
402        $dir = preg_replace ('/^'.preg_quote($_SERVER['DOCUMENT_ROOT'],'/').'/','',
403                $_SERVER['SCRIPT_FILENAME']);
404        $dir = dirname('/'.$dir);
405    }else{
406        $dir = '.'; //probably wrong
407    }
408
409    $dir = str_replace('\\','/',$dir);             // bugfix for weird WIN behaviour
410    $dir = preg_replace('#//+#','/',"/$dir/");     // ensure leading and trailing slashes
411
412    //handle script in lib/exe dir
413    $dir = preg_replace('!lib/exe/$!','',$dir);
414
415    //handle script in lib/plugins dir
416    $dir = preg_replace('!lib/plugins/.*$!','',$dir);
417
418    //finish here for relative URLs
419    if(!$abs) return $dir;
420
421    //use config option if available, trim any slash from end of baseurl to avoid multiple consecutive slashes in the path
422    if($conf['baseurl']) return rtrim($conf['baseurl'],'/').$dir;
423
424    //split hostheader into host and port
425    if(isset($_SERVER['HTTP_HOST'])){
426        $parsed_host = parse_url('http://'.$_SERVER['HTTP_HOST']);
427        $host = $parsed_host['host'];
428        $port = $parsed_host['port'];
429    }elseif(isset($_SERVER['SERVER_NAME'])){
430        $parsed_host = parse_url('http://'.$_SERVER['SERVER_NAME']);
431        $host = $parsed_host['host'];
432        $port = $parsed_host['port'];
433    }else{
434        $host = php_uname('n');
435        $port = '';
436    }
437
438    if(!$port && isset($_SERVER['SERVER_PORT'])) {
439        $port = $_SERVER['SERVER_PORT'];
440    }
441
442    if(is_null($port)){
443        $port = '';
444    }
445
446    if(!is_ssl()){
447        $proto = 'http://';
448        if ($port == '80') {
449            $port = '';
450        }
451    }else{
452        $proto = 'https://';
453        if ($port == '443') {
454            $port = '';
455        }
456    }
457
458    if($port !== '') $port = ':'.$port;
459
460    return $proto.$host.$port.$dir;
461}
462
463/**
464 * Check if accessed via HTTPS
465 *
466 * Apache leaves ,$_SERVER['HTTPS'] empty when not available, IIS sets it to 'off'.
467 * 'false' and 'disabled' are just guessing
468 *
469 * @returns bool true when SSL is active
470 */
471function is_ssl(){
472    if (!isset($_SERVER['HTTPS']) ||
473        preg_match('/^(|off|false|disabled)$/i',$_SERVER['HTTPS'])){
474        return false;
475    }else{
476        return true;
477    }
478}
479
480/**
481 * print a nice message even if no styles are loaded yet.
482 */
483function nice_die($msg){
484    echo<<<EOT
485<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
486    "http://www.w3.org/TR/html4/loose.dtd">
487<html>
488<head><title>DokuWiki Setup Error</title></head>
489<body style="font-family: Arial, sans-serif">
490    <div style="width:60%; margin: auto; background-color: #fcc;
491                border: 1px solid #faa; padding: 0.5em 1em;">
492        <h1 style="font-size: 120%">DokuWiki Setup Error</h1>
493        <p>$msg</p>
494    </div>
495</body>
496</html>
497EOT;
498    exit;
499}
500
501/**
502 * A realpath() replacement
503 *
504 * This function behaves similar to PHP's realpath() but does not resolve
505 * symlinks or accesses upper directories
506 *
507 * @author Andreas Gohr <andi@splitbrain.org>
508 * @author <richpageau at yahoo dot co dot uk>
509 * @link   http://de3.php.net/manual/en/function.realpath.php#75992
510 */
511function fullpath($path,$exists=false){
512    static $run = 0;
513    $root  = '';
514    $iswin = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' || @$GLOBALS['DOKU_UNITTEST_ASSUME_WINDOWS']);
515
516    // find the (indestructable) root of the path - keeps windows stuff intact
517    if($path{0} == '/'){
518        $root = '/';
519    }elseif($iswin){
520        // match drive letter and UNC paths
521        if(preg_match('!^([a-zA-z]:)(.*)!',$path,$match)){
522            $root = $match[1].'/';
523            $path = $match[2];
524        }else if(preg_match('!^(\\\\\\\\[^\\\\/]+\\\\[^\\\\/]+[\\\\/])(.*)!',$path,$match)){
525            $root = $match[1];
526            $path = $match[2];
527        }
528    }
529    $path = str_replace('\\','/',$path);
530
531    // if the given path wasn't absolute already, prepend the script path and retry
532    if(!$root){
533        $base = dirname($_SERVER['SCRIPT_FILENAME']);
534        $path = $base.'/'.$path;
535        if($run == 0){ // avoid endless recursion when base isn't absolute for some reason
536            $run++;
537            return fullpath($path,$exists);
538        }
539    }
540    $run = 0;
541
542    // canonicalize
543    $path=explode('/', $path);
544    $newpath=array();
545    foreach($path as $p) {
546        if ($p === '' || $p === '.') continue;
547        if ($p==='..') {
548            array_pop($newpath);
549            continue;
550        }
551        array_push($newpath, $p);
552    }
553    $finalpath = $root.implode('/', $newpath);
554
555    // check for existance when needed (except when unit testing)
556    if($exists && !defined('DOKU_UNITTEST') && !@file_exists($finalpath)) {
557        return false;
558    }
559    return $finalpath;
560}
561
562