xref: /dokuwiki/inc/init.php (revision 6353ef5ad0cd97399815c17e59758611d1bc1f79) 
1<?php
2/**
3 * Initialize some defaults needed for DokuWiki
4 */
5
6// start timing Dokuwiki execution
7function delta_time($start=0) {
8    list($usec, $sec) = explode(" ", microtime());
9    return ((float)$usec+(float)$sec)-((float)$start);
10}
11define('DOKU_START_TIME', delta_time());
12
13global $config_cascade;
14$config_cascade = '';
15
16// if available load a preload config file
17$preload = fullpath(dirname(__FILE__)).'/preload.php';
18if (@file_exists($preload)) include($preload);
19
20// define the include path
21if(!defined('DOKU_INC')) define('DOKU_INC',fullpath(dirname(__FILE__).'/../').'/');
22
23// define Plugin dir
24if(!defined('DOKU_PLUGIN'))  define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
25
26// define config path (packagers may want to change this to /etc/dokuwiki/)
27if(!defined('DOKU_CONF')) define('DOKU_CONF',DOKU_INC.'conf/');
28
29// check for error reporting override or set error reporting to sane values
30if (!defined('DOKU_E_LEVEL') && @file_exists(DOKU_CONF.'report_e_all')) {
31    define('DOKU_E_LEVEL', E_ALL);
32}
33if (!defined('DOKU_E_LEVEL')) {
34    if(defined('E_DEPRECATED')){ // since php 5.3
35        error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
36    }else{
37        error_reporting(E_ALL ^ E_NOTICE);
38    }
39} else {
40    error_reporting(DOKU_E_LEVEL);
41}
42
43// init memory caches
44global $cache_revinfo;
45       $cache_revinfo = array();
46global $cache_wikifn;
47       $cache_wikifn = array();
48global $cache_cleanid;
49       $cache_cleanid = array();
50global $cache_authname;
51       $cache_authname = array();
52global $cache_metadata;
53       $cache_metadata = array();
54
55//set the configuration cascade - but only if its not already been set in preload.php
56if (empty($config_cascade)) {
57    include(DOKU_INC.'inc/config_cascade.php');
58}
59
60//prepare config array()
61global $conf;
62$conf = array();
63
64// load the global config file(s)
65foreach (array('default','local','protected') as $config_group) {
66    if (empty($config_cascade['main'][$config_group])) continue;
67    foreach ($config_cascade['main'][$config_group] as $config_file) {
68        if (@file_exists($config_file)) {
69            include($config_file);
70        }
71    }
72}
73
74//prepare language array
75global $lang;
76$lang = array();
77
78//load the language files
79require_once(DOKU_INC.'inc/lang/en/lang.php');
80if ( $conf['lang'] && $conf['lang'] != 'en' ) {
81    require_once(DOKU_INC.'inc/lang/'.$conf['lang'].'/lang.php');
82}
83
84//prepare license array()
85global $license;
86$license = array();
87
88// load the license file(s)
89foreach (array('default','local') as $config_group) {
90    if (empty($config_cascade['license'][$config_group])) continue;
91    foreach ($config_cascade['license'][$config_group] as $config_file) {
92        if(@file_exists($config_file)){
93            include($config_file);
94        }
95    }
96}
97
98// set timezone (as in pre 5.3.0 days)
99date_default_timezone_set(@date_default_timezone_get());
100
101// define baseURL
102if(!defined('DOKU_REL')) define('DOKU_REL',getBaseURL(false));
103if(!defined('DOKU_URL')) define('DOKU_URL',getBaseURL(true));
104if(!defined('DOKU_BASE')){
105    if($conf['canonical']){
106        define('DOKU_BASE',DOKU_URL);
107    }else{
108        define('DOKU_BASE',DOKU_REL);
109    }
110}
111
112// define whitespace
113if(!defined('DOKU_LF')) define ('DOKU_LF',"\n");
114if(!defined('DOKU_TAB')) define ('DOKU_TAB',"\t");
115
116// define cookie and session id, append server port when securecookie is configured FS#1664
117if (!defined('DOKU_COOKIE')) define('DOKU_COOKIE', 'DW'.md5(DOKU_REL.(($conf['securecookie'])?$_SERVER['SERVER_PORT']:'')));
118
119
120// define main script
121if(!defined('DOKU_SCRIPT')) define('DOKU_SCRIPT','doku.php');
122
123// define Template baseURL
124if(!defined('DOKU_TPL')) define('DOKU_TPL',
125        DOKU_BASE.'lib/tpl/'.$conf['template'].'/');
126
127// define real Template directory
128if(!defined('DOKU_TPLINC')) define('DOKU_TPLINC',
129        DOKU_INC.'lib/tpl/'.$conf['template'].'/');
130
131// make session rewrites XHTML compliant
132@ini_set('arg_separator.output', '&amp;');
133
134// make sure global zlib does not interfere FS#1132
135@ini_set('zlib.output_compression', 'off');
136
137// increase PCRE backtrack limit
138@ini_set('pcre.backtrack_limit', '20971520');
139
140// enable gzip compression if supported
141$conf['gzip_output'] &= (strpos($_SERVER['HTTP_ACCEPT_ENCODING'],'gzip') !== false);
142if ($conf['gzip_output'] &&
143        !defined('DOKU_DISABLE_GZIP_OUTPUT') &&
144        function_exists('ob_gzhandler')) {
145    ob_start('ob_gzhandler');
146}
147
148// init session
149if (!headers_sent() && !defined('NOSESSION')){
150    session_name("DokuWiki");
151    if (version_compare(PHP_VERSION, '5.2.0', '>')) {
152        session_set_cookie_params(0,DOKU_REL,'',($conf['securecookie'] && is_ssl()),true);
153    }else{
154        session_set_cookie_params(0,DOKU_REL,'',($conf['securecookie'] && is_ssl()));
155    }
156    session_start();
157
158    // load left over messages
159    if(isset($_SESSION[DOKU_COOKIE]['msg'])){
160        $MSG = $_SESSION[DOKU_COOKIE]['msg'];
161        unset($_SESSION[DOKU_COOKIE]['msg']);
162    }
163}
164
165// kill magic quotes
166if (get_magic_quotes_gpc() && !defined('MAGIC_QUOTES_STRIPPED')) {
167    if (!empty($_GET))    remove_magic_quotes($_GET);
168    if (!empty($_POST))   remove_magic_quotes($_POST);
169    if (!empty($_COOKIE)) remove_magic_quotes($_COOKIE);
170    if (!empty($_REQUEST)) remove_magic_quotes($_REQUEST);
171    @ini_set('magic_quotes_gpc', 0);
172    define('MAGIC_QUOTES_STRIPPED',1);
173}
174@set_magic_quotes_runtime(0);
175@ini_set('magic_quotes_sybase',0);
176
177// don't let cookies ever interfere with request vars
178$_REQUEST = array_merge($_GET,$_POST);
179
180// we don't want a purge URL to be digged
181if(isset($_REQUEST['purge']) && $_SERVER['HTTP_REFERER']) unset($_REQUEST['purge']);
182
183// disable gzip if not available
184if($conf['compression'] == 'bz2' && !function_exists('bzopen')){
185    $conf['compression'] = 'gz';
186}
187if($conf['compression'] == 'gz' && !function_exists('gzopen')){
188    $conf['compression'] = 0;
189}
190
191// fix dateformat for upgraders
192if(strpos($conf['dformat'],'%') === false){
193    $conf['dformat'] = '%Y/%m/%d %H:%M';
194}
195
196// precalculate file creation modes
197init_creationmodes();
198
199// make real paths and check them
200init_paths();
201init_files();
202
203// setup plugin controller class (can be overwritten in preload.php)
204$plugin_types = array('admin','syntax','action','renderer', 'helper');
205global $plugin_controller_class, $plugin_controller;
206if (empty($plugin_controller_class)) $plugin_controller_class = 'Doku_Plugin_Controller';
207
208// load libraries
209require_once(DOKU_INC.'inc/load.php');
210
211// initialize plugin controller
212$plugin_controller = new $plugin_controller_class();
213
214// initialize the event handler
215global $EVENT_HANDLER;
216$EVENT_HANDLER = new Doku_Event_Handler();
217
218// setup authentication system
219if (!defined('NOSESSION')) {
220    auth_setup();
221}
222
223/**
224 * Checks paths from config file
225 */
226function init_paths(){
227    global $conf;
228
229    $paths = array('datadir'   => 'pages',
230            'olddir'    => 'attic',
231            'mediadir'  => 'media',
232            'metadir'   => 'meta',
233            'cachedir'  => 'cache',
234            'indexdir'  => 'index',
235            'lockdir'   => 'locks',
236            'tmpdir'    => 'tmp');
237
238    foreach($paths as $c => $p){
239        if(empty($conf[$c]))  $conf[$c] = $conf['savedir'].'/'.$p;
240        $conf[$c]             = init_path($conf[$c]);
241        if(empty($conf[$c]))  nice_die("The $c ('$p') does not exist, isn't accessible or writable.
242                You should check your config and permission settings.
243                Or maybe you want to <a href=\"install.php\">run the
244                installer</a>?");
245    }
246
247    // path to old changelog only needed for upgrading
248    $conf['changelog_old'] = init_path((isset($conf['changelog']))?($conf['changelog']):($conf['savedir'].'/changes.log'));
249    if ($conf['changelog_old']=='') { unset($conf['changelog_old']); }
250    // hardcoded changelog because it is now a cache that lives in meta
251    $conf['changelog'] = $conf['metadir'].'/_dokuwiki.changes';
252    $conf['media_changelog'] = $conf['metadir'].'/_media.changes';
253}
254
255/**
256 * Checks the existance of certain files and creates them if missing.
257 */
258function init_files(){
259    global $conf;
260
261    $files = array($conf['indexdir'].'/page.idx');
262
263    foreach($files as $file){
264        if(!@file_exists($file)){
265            $fh = @fopen($file,'a');
266            if($fh){
267                fclose($fh);
268                if($conf['fperm']) chmod($file, $conf['fperm']);
269            }else{
270                nice_die("$file is not writable. Check your permissions settings!");
271            }
272        }
273    }
274
275    # create title index (needs to have same length as page.idx)
276    $file = $conf['indexdir'].'/title.idx';
277    if(!@file_exists($file)){
278        $pages = file($conf['indexdir'].'/page.idx');
279        $pages = count($pages);
280        $fh = @fopen($file,'a');
281        if($fh){
282            for($i=0; $i<$pages; $i++){
283                fwrite($fh,"\n");
284            }
285            fclose($fh);
286        }else{
287            nice_die("$file is not writable. Check your permissions settings!");
288        }
289    }
290}
291
292/**
293 * Returns absolute path
294 *
295 * This tries the given path first, then checks in DOKU_INC.
296 * Check for accessability on directories as well.
297 *
298 * @author Andreas Gohr <andi@splitbrain.org>
299 */
300function init_path($path){
301    // check existance
302    $p = fullpath($path);
303    if(!@file_exists($p)){
304        $p = fullpath(DOKU_INC.$path);
305        if(!@file_exists($p)){
306            return '';
307        }
308    }
309
310    // check writability
311    if(!@is_writable($p)){
312        return '';
313    }
314
315    // check accessability (execute bit) for directories
316    if(@is_dir($p) && !@file_exists("$p/.")){
317        return '';
318    }
319
320    return $p;
321}
322
323/**
324 * Sets the internal config values fperm and dperm which, when set,
325 * will be used to change the permission of a newly created dir or
326 * file with chmod. Considers the influence of the system's umask
327 * setting the values only if needed.
328 */
329function init_creationmodes(){
330    global $conf;
331
332    // Legacy support for old umask/dmask scheme
333    unset($conf['dmask']);
334    unset($conf['fmask']);
335    unset($conf['umask']);
336    unset($conf['fperm']);
337    unset($conf['dperm']);
338
339    // get system umask, fallback to 0 if none available
340    $umask = @umask();
341    if(!$umask) $umask = 0000;
342
343    // check what is set automatically by the system on file creation
344    // and set the fperm param if it's not what we want
345    $auto_fmode = 0666 & ~$umask;
346    if($auto_fmode != $conf['fmode']) $conf['fperm'] = $conf['fmode'];
347
348    // check what is set automatically by the system on file creation
349    // and set the dperm param if it's not what we want
350    $auto_dmode = $conf['dmode'] & ~$umask;
351    if($auto_dmode != $conf['dmode']) $conf['dperm'] = $conf['dmode'];
352}
353
354/**
355 * remove magic quotes recursivly
356 *
357 * @author Andreas Gohr <andi@splitbrain.org>
358 */
359function remove_magic_quotes(&$array) {
360    foreach (array_keys($array) as $key) {
361        // handle magic quotes in keynames (breaks order)
362        $sk = stripslashes($key);
363        if($sk != $key){
364            $array[$sk] = $array[$key];
365            unset($array[$key]);
366            $key = $sk;
367        }
368
369        // do recursion if needed
370        if (is_array($array[$key])) {
371            remove_magic_quotes($array[$key]);
372        }else {
373            $array[$key] = stripslashes($array[$key]);
374        }
375    }
376}
377
378/**
379 * Returns the full absolute URL to the directory where
380 * DokuWiki is installed in (includes a trailing slash)
381 *
382 * @author Andreas Gohr <andi@splitbrain.org>
383 */
384function getBaseURL($abs=null){
385    global $conf;
386    //if canonical url enabled always return absolute
387    if(is_null($abs)) $abs = $conf['canonical'];
388
389    if($conf['basedir']){
390        $dir = $conf['basedir'];
391    }elseif(substr($_SERVER['SCRIPT_NAME'],-4) == '.php'){
392        $dir = dirname($_SERVER['SCRIPT_NAME']);
393    }elseif(substr($_SERVER['PHP_SELF'],-4) == '.php'){
394        $dir = dirname($_SERVER['PHP_SELF']);
395    }elseif($_SERVER['DOCUMENT_ROOT'] && $_SERVER['SCRIPT_FILENAME']){
396        $dir = preg_replace ('/^'.preg_quote($_SERVER['DOCUMENT_ROOT'],'/').'/','',
397                $_SERVER['SCRIPT_FILENAME']);
398        $dir = dirname('/'.$dir);
399    }else{
400        $dir = '.'; //probably wrong
401    }
402
403    $dir = str_replace('\\','/',$dir);             // bugfix for weird WIN behaviour
404    $dir = preg_replace('#//+#','/',"/$dir/");     // ensure leading and trailing slashes
405
406    //handle script in lib/exe dir
407    $dir = preg_replace('!lib/exe/$!','',$dir);
408
409    //handle script in lib/plugins dir
410    $dir = preg_replace('!lib/plugins/.*$!','',$dir);
411
412    //finish here for relative URLs
413    if(!$abs) return $dir;
414
415    //use config option if available, trim any slash from end of baseurl to avoid multiple consecutive slashes in the path
416    if($conf['baseurl']) return rtrim($conf['baseurl'],'/').$dir;
417
418    //split hostheader into host and port
419    $addr = explode(':',$_SERVER['HTTP_HOST']);
420    $host = $addr[0];
421    $port = '';
422    if (isset($addr[1])) {
423        $port = $addr[1];
424    } elseif (isset($_SERVER['SERVER_PORT'])) {
425        $port = $_SERVER['SERVER_PORT'];
426    }
427    if(!is_ssl()){
428        $proto = 'http://';
429        if ($port == '80') {
430            $port = '';
431        }
432    }else{
433        $proto = 'https://';
434        if ($port == '443') {
435            $port = '';
436        }
437    }
438
439    if($port !== '') $port = ':'.$port;
440
441    return $proto.$host.$port.$dir;
442}
443
444/**
445 * Check if accessed via HTTPS
446 *
447 * Apache leaves ,$_SERVER['HTTPS'] empty when not available, IIS sets it to 'off'.
448 * 'false' and 'disabled' are just guessing
449 *
450 * @returns bool true when SSL is active
451 */
452function is_ssl(){
453    if (!isset($_SERVER['HTTPS']) ||
454        preg_match('/^(|off|false|disabled)$/i',$_SERVER['HTTPS'])){
455        return false;
456    }else{
457        return true;
458    }
459}
460
461/**
462 * print a nice message even if no styles are loaded yet.
463 */
464function nice_die($msg){
465    echo<<<EOT
466<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
467    "http://www.w3.org/TR/html4/loose.dtd">
468<html>
469<head><title>DokuWiki Setup Error</title></head>
470<body style="font-family: Arial, sans-serif">
471    <div style="width:60%; margin: auto; background-color: #fcc;
472                border: 1px solid #faa; padding: 0.5em 1em;">
473        <h1 style="font-size: 120%">DokuWiki Setup Error</h1>
474        <p>$msg</p>
475    </div>
476</body>
477</html>
478EOT;
479    exit;
480}
481
482/**
483 * A realpath() replacement
484 *
485 * This function behaves similar to PHP's realpath() but does not resolve
486 * symlinks or accesses upper directories
487 *
488 * @author Andreas Gohr <andi@splitbrain.org>
489 * @author <richpageau at yahoo dot co dot uk>
490 * @link   http://de3.php.net/manual/en/function.realpath.php#75992
491 */
492function fullpath($path,$exists=false){
493    static $run = 0;
494    $root  = '';
495    $iswin = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' || @$GLOBALS['DOKU_UNITTEST_ASSUME_WINDOWS']);
496
497    // find the (indestructable) root of the path - keeps windows stuff intact
498    if($path{0} == '/'){
499        $root = '/';
500    }elseif($iswin){
501        // match drive letter and UNC paths
502        if(preg_match('!^([a-zA-z]:)(.*)!',$path,$match)){
503            $root = $match[1].'/';
504            $path = $match[2];
505        }else if(preg_match('!^(\\\\\\\\[^\\\\/]+\\\\[^\\\\/]+[\\\\/])(.*)!',$path,$match)){
506            $root = $match[1];
507            $path = $match[2];
508        }
509    }
510    $path = str_replace('\\','/',$path);
511
512    // if the given path wasn't absolute already, prepend the script path and retry
513    if(!$root){
514        $base = dirname($_SERVER['SCRIPT_FILENAME']);
515        $path = $base.'/'.$path;
516        if($run == 0){ // avoid endless recursion when base isn't absolute for some reason
517            $run++;
518            return fullpath($path,$exists);
519        }
520    }
521    $run = 0;
522
523    // canonicalize
524    $path=explode('/', $path);
525    $newpath=array();
526    foreach($path as $p) {
527        if ($p === '' || $p === '.') continue;
528        if ($p==='..') {
529            array_pop($newpath);
530            continue;
531        }
532        array_push($newpath, $p);
533    }
534    $finalpath = $root.implode('/', $newpath);
535
536    // check for existance when needed (except when unit testing)
537    if($exists && !defined('DOKU_UNITTEST') && !@file_exists($finalpath)) {
538        return false;
539    }
540    return $finalpath;
541}
542
543