libraries/Config.class.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  *
   5  *
   6  * @version $Id$
   7  */
   8
   9 /**
  10  * Configuration class
  11  *
  12  */
  13 class PMA_Config
  14 {
  15     /**
  16      * @var string  default config source
  17      */
  18     var $default_source = './libraries/config.default.php';
  19
  20     /**
  21      * @var array   configuration settings
  22      */
  23     var $settings = array();
  24
  25     /**
  26      * @var string  config source
  27      */
  28     var $source = '';
  29
  30     /**
  31      * @var int     source modification time
  32      */
  33     var $source_mtime = 0;
  34     var $default_source_mtime = 0;
  35     var $set_mtime = 0;
  36
  37     /**
  38      * @var boolean
  39      */
  40     var $error_config_file = false;
  41
  42     /**
  43      * @var boolean
  44      */
  45     var $error_config_default_file = false;
  46
  47     /**
  48      * @var boolean
  49      */
  50     var $error_pma_uri = false;
  51
  52     /**
  53      * @var array
  54      */
  55     var $default_server = array();
  56
  57     /**
  58      * @var boolean wether init is done or mot
  59      * set this to false to force some initial checks
  60      * like checking for required functions
  61      */
  62     var $done = false;
  63
  64     /**
  65      * constructor
  66      *
  67      * @param   string  source to read config from
  68      */
  69     function __construct($source = null)
  70     {
  71         $this->settings = array();
  72
  73         // functions need to refresh in case of config file changed goes in
  74         // PMA_Config::load()
  75         $this->load($source);
  76
  77         // other settings, independant from config file, comes in
  78         $this->checkSystem();
  79
  80         $this->checkIsHttps();
  81     }
  82
  83     /**
  84      * sets system and application settings
  85      */
  86     function checkSystem()
  87     {
  88         $this->set('PMA_VERSION', '2.11.11.3');
  89         /**
  90          * @deprecated
  91          */
  92         $this->set('PMA_THEME_VERSION', 2);
  93         /**
  94          * @deprecated
  95          */
  96         $this->set('PMA_THEME_GENERATION', 2);
  97
  98         $this->checkPhpVersion();
  99         $this->checkWebServerOs();
 100         $this->checkWebServer();
 101         $this->checkGd2();
 102         $this->checkClient();
 103         $this->checkUpload();
 104         $this->checkUploadSize();
 105         $this->checkOutputCompression();
 106     }
 107
 108     /**
 109      * wether to use gzip output compression or not
 110      */
 111     function checkOutputCompression()
 112     {
 113         // If zlib output compression is set in the php configuration file, no
 114         // output buffering should be run
 115         if (@ini_get('zlib.output_compression')) {
 116             $this->set('OBGzip', false);
 117         }
 118
 119         // disable output-buffering (if set to 'auto') for IE6, else enable it.
 120         if (strtolower($this->get('OBGzip')) == 'auto') {
 121             if ($this->get('PMA_USR_BROWSER_AGENT') == 'IE'
 122               && $this->get('PMA_USR_BROWSER_VER') >= 6
 123               && $this->get('PMA_USR_BROWSER_VER') < 7) {
 124                 $this->set('OBGzip', false);
 125             } else {
 126                 $this->set('OBGzip', true);
 127             }
 128         }
 129     }
 130
 131     /**
 132      * Determines platform (OS), browser and version of the user
 133      * Based on a phpBuilder article:
 134      * @see http://www.phpbuilder.net/columns/tim20000821.php
 135      */
 136     function checkClient()
 137     {
 138         if (PMA_getenv('HTTP_USER_AGENT')) {
 139             $HTTP_USER_AGENT = PMA_getenv('HTTP_USER_AGENT');
 140         } elseif (!isset($HTTP_USER_AGENT)) {
 141             $HTTP_USER_AGENT = '';
 142         }
 143
 144         // 1. Platform
 145         if (strstr($HTTP_USER_AGENT, 'Win')) {
 146             $this->set('PMA_USR_OS', 'Win');
 147         } elseif (strstr($HTTP_USER_AGENT, 'Mac')) {
 148             $this->set('PMA_USR_OS', 'Mac');
 149         } elseif (strstr($HTTP_USER_AGENT, 'Linux')) {
 150             $this->set('PMA_USR_OS', 'Linux');
 151         } elseif (strstr($HTTP_USER_AGENT, 'Unix')) {
 152             $this->set('PMA_USR_OS', 'Unix');
 153         } elseif (strstr($HTTP_USER_AGENT, 'OS/2')) {
 154             $this->set('PMA_USR_OS', 'OS/2');
 155         } else {
 156             $this->set('PMA_USR_OS', 'Other');
 157         }
 158
 159         // 2. browser and version
 160         // (must check everything else before Mozilla)
 161
 162         if (preg_match('@Opera(/| )([0-9].[0-9]{1,2})@', $HTTP_USER_AGENT, $log_version)) {
 163             $this->set('PMA_USR_BROWSER_VER', $log_version[2]);
 164             $this->set('PMA_USR_BROWSER_AGENT', 'OPERA');
 165         } elseif (preg_match('@MSIE ([0-9].[0-9]{1,2})@', $HTTP_USER_AGENT, $log_version)) {
 166             $this->set('PMA_USR_BROWSER_VER', $log_version[1]);
 167             $this->set('PMA_USR_BROWSER_AGENT', 'IE');
 168         } elseif (preg_match('@OmniWeb/([0-9].[0-9]{1,2})@', $HTTP_USER_AGENT, $log_version)) {
 169             $this->set('PMA_USR_BROWSER_VER', $log_version[1]);
 170             $this->set('PMA_USR_BROWSER_AGENT', 'OMNIWEB');
 171         //} elseif (ereg('Konqueror/([0-9].[0-9]{1,2})', $HTTP_USER_AGENT, $log_version)) {
 172         // Konqueror 2.2.2 says Konqueror/2.2.2
 173         // Konqueror 3.0.3 says Konqueror/3
 174         } elseif (preg_match('@(Konqueror/)(.*)(;)@', $HTTP_USER_AGENT, $log_version)) {
 175             $this->set('PMA_USR_BROWSER_VER', $log_version[2]);
 176             $this->set('PMA_USR_BROWSER_AGENT', 'KONQUEROR');
 177         } elseif (preg_match('@Mozilla/([0-9].[0-9]{1,2})@', $HTTP_USER_AGENT, $log_version)
 178                    && preg_match('@Safari/([0-9]*)@', $HTTP_USER_AGENT, $log_version2)) {
 179             $this->set('PMA_USR_BROWSER_VER', $log_version[1] . '.' . $log_version2[1]);
 180             $this->set('PMA_USR_BROWSER_AGENT', 'SAFARI');
 181         } elseif (preg_match('@rv:1.9(.*)Gecko@', $HTTP_USER_AGENT)) {
 182             $this->set('PMA_USR_BROWSER_VER', '1.9');
 183             $this->set('PMA_USR_BROWSER_AGENT', 'GECKO');
 184         } elseif (preg_match('@Mozilla/([0-9].[0-9]{1,2})@', $HTTP_USER_AGENT, $log_version)) {
 185             $this->set('PMA_USR_BROWSER_VER', $log_version[1]);
 186             $this->set('PMA_USR_BROWSER_AGENT', 'MOZILLA');
 187         } else {
 188             $this->set('PMA_USR_BROWSER_VER', 0);
 189             $this->set('PMA_USR_BROWSER_AGENT', 'OTHER');
 190         }
 191     }
 192
 193     /**
 194      * Whether GD2 is present
 195      */
 196     function checkGd2()
 197     {
 198         if ($this->get('GD2Available') == 'yes') {
 199             $this->set('PMA_IS_GD2', 1);
 200         } elseif ($this->get('GD2Available') == 'no') {
 201             $this->set('PMA_IS_GD2', 0);
 202         } else {
 203             if (!@extension_loaded('gd')) {
 204                 PMA_dl('gd');
 205             }
 206             if (!@function_exists('imagecreatetruecolor')) {
 207                 $this->set('PMA_IS_GD2', 0);
 208             } else {
 209                 if (@function_exists('gd_info')) {
 210                     $gd_nfo = gd_info();
 211                     if (strstr($gd_nfo["GD Version"], '2.')) {
 212                         $this->set('PMA_IS_GD2', 1);
 213                     } else {
 214                         $this->set('PMA_IS_GD2', 0);
 215                     }
 216                 } else {
 217                     /* We must do hard way... */
 218                     ob_start();
 219                     phpinfo(INFO_MODULES); /* Only modules */
 220                     $a = strip_tags(ob_get_contents());
 221                     ob_end_clean();
 222                     /* Get GD version string from phpinfo output */
 223                     if (preg_match('@GD Version[[:space:]]*\(.*\)@', $a, $v)) {
 224                         if (strstr($v, '2.')) {
 225                             $this->set('PMA_IS_GD2', 1);
 226                         } else {
 227                             $this->set('PMA_IS_GD2', 0);
 228                         }
 229                     } else {
 230                         $this->set('PMA_IS_GD2', 0);
 231                     }
 232                 }
 233             }
 234         }
 235     }
 236
 237     /**
 238      * Whether the Web server php is running on is IIS
 239      */
 240     function checkWebServer()
 241     {
 242         if (PMA_getenv('SERVER_SOFTWARE')
 243           // some versions return Microsoft-IIS, some Microsoft/IIS
 244           // we could use a preg_match() but it's slower
 245           && stristr(PMA_getenv('SERVER_SOFTWARE'), 'Microsoft')
 246           && stristr(PMA_getenv('SERVER_SOFTWARE'), 'IIS')) {
 247             $this->set('PMA_IS_IIS', 1);
 248         } else {
 249             $this->set('PMA_IS_IIS', 0);
 250         }
 251     }
 252
 253     /**
 254      * Whether the os php is running on is windows or not
 255      */
 256     function checkWebServerOs()
 257     {
 258         // Default to Unix or Equiv
 259         $this->set('PMA_IS_WINDOWS', 0);
 260         // If PHP_OS is defined then continue
 261         if (defined('PHP_OS')) {
 262             if (stristr(PHP_OS, 'win')) {
 263                 // Is it some version of Windows
 264                 $this->set('PMA_IS_WINDOWS', 1);
 265             } elseif (stristr(PHP_OS, 'OS/2')) {
 266                 // Is it OS/2 (No file permissions like Windows)
 267                 $this->set('PMA_IS_WINDOWS', 1);
 268             }
 269         }
 270     }
 271
 272     /**
 273      * detects PHP version
 274      */
 275     function checkPhpVersion()
 276     {
 277         $match = array();
 278         if (! preg_match('@([0-9]{1,2}).([0-9]{1,2}).([0-9]{1,2})@',
 279                 phpversion(), $match)) {
 280             $result = preg_match('@([0-9]{1,2}).([0-9]{1,2})@',
 281                 phpversion(), $match);
 282         }
 283         if (isset($match) && ! empty($match[1])) {
 284             if (! isset($match[2])) {
 285                 $match[2] = 0;
 286             }
 287             if (! isset($match[3])) {
 288                 $match[3] = 0;
 289             }
 290             $this->set('PMA_PHP_INT_VERSION',
 291                 (int) sprintf('%d%02d%02d', $match[1], $match[2], $match[3]));
 292         } else {
 293             $this->set('PMA_PHP_INT_VERSION', 0);
 294         }
 295         $this->set('PMA_PHP_STR_VERSION', phpversion());
 296     }
 297
 298     /**
 299      * re-init object after loading from session file
 300      * checks config file for changes and relaods if neccessary
 301      */
 302     function __wakeup()
 303     {
 304         if (! $this->checkConfigSource()
 305           || $this->source_mtime !== filemtime($this->getSource())
 306           || $this->default_source_mtime !== filemtime($this->default_source)
 307           || $this->error_config_file
 308           || $this->error_config_default_file) {
 309             $this->settings = array();
 310             $this->load();
 311             $this->checkSystem();
 312         }
 313
 314         // check for https needs to be done everytime,
 315         // as https and http uses same session so this info can not be stored
 316         // in session
 317         $this->checkIsHttps();
 318
 319         $this->checkCollationConnection();
 320         $this->checkFontsize();
 321     }
 322
 323     /**
 324      * loads default values from default source
 325      *
 326      * @uses    file_exists()
 327      * @uses    $this->default_source
 328      * @uses    $this->error_config_default_file
 329      * @uses    $this->settings
 330      * @return  boolean     success
 331      */
 332     function loadDefaults()
 333     {
 334         $cfg = array();
 335         if (! file_exists($this->default_source)) {
 336             $this->error_config_default_file = true;
 337             return false;
 338         }
 339         include $this->default_source;
 340
 341         $this->default_source_mtime = filemtime($this->default_source);
 342
 343         $this->default_server = $cfg['Servers'][1];
 344         unset($cfg['Servers']);
 345
 346         $this->settings = PMA_array_merge_recursive($this->settings, $cfg);
 347
 348         $this->error_config_default_file = false;
 349
 350         return true;
 351     }
 352
 353     /**
 354      * loads configuration from $source, usally the config file
 355      * should be called on object creation and from __wakeup if config file
 356      * has changed
 357      *
 358      * @param   string $source  config file
 359      */
 360     function load($source = null)
 361     {
 362         $this->loadDefaults();
 363
 364         if (null !== $source) {
 365             $this->setSource($source);
 366         }
 367
 368         if (! $this->checkConfigSource()) {
 369             return false;
 370         }
 371
 372         $cfg = array();
 373
 374         /**
 375          * Parses the configuration file
 376          */
 377         $old_error_reporting = error_reporting(0);
 378         // avoid "headers already sent" error when file contains a BOM
 379         ob_start();
 380         if (function_exists('file_get_contents')) {
 381             $eval_result =
 382                 eval('?>' . trim(file_get_contents($this->getSource())));
 383         } else {
 384             $eval_result =
 385                 eval('?>' . trim(implode("\n", file($this->getSource()))));
 386         }
 387         ob_end_clean();
 388         error_reporting($old_error_reporting);
 389
 390         if ($eval_result === false) {
 391             $this->error_config_file = true;
 392         } else  {
 393             $this->error_config_file = false;
 394             $this->source_mtime = filemtime($this->getSource());
 395         }
 396
 397         /**
 398          * Backward compatibility code
 399          */
 400         if (!empty($cfg['DefaultTabTable'])) {
 401             $cfg['DefaultTabTable'] = str_replace('_properties', '', str_replace('tbl_properties.php', 'tbl_sql.php', $cfg['DefaultTabTable']));
 402         }
 403         if (!empty($cfg['DefaultTabDatabase'])) {
 404             $cfg['DefaultTabDatabase'] = str_replace('_details', '', str_replace('db_details.php', 'db_sql.php', $cfg['DefaultTabDatabase']));
 405         }
 406
 407         $this->checkFontsize();
 408         //$this->checkPmaAbsoluteUri();
 409         $this->settings = PMA_array_merge_recursive($this->settings, $cfg);
 410
 411         // Handling of the collation must be done after merging of $cfg
 412         // (from config.inc.php) so that $cfg['DefaultConnectionCollation']
 413         // can have an effect. Note that the presence of collation
 414         // information in a cookie has priority over what is defined
 415         // in the default or user's config files.
 416         /**
 417          * @todo check validity of $_COOKIE['pma_collation_connection']
 418          */
 419         if (! empty($_COOKIE['pma_collation_connection'])) {
 420             $this->set('collation_connection',
 421                 strip_tags($_COOKIE['pma_collation_connection']));
 422         } else {
 423             $this->set('collation_connection',
 424                 $this->get('DefaultConnectionCollation'));
 425         }
 426         // Now, a collation information could come from REQUEST
 427         // (an example of this: the collation selector in main.php)
 428         // so the following handles the setting of collation_connection
 429         // and later, in common.inc.php, the cookie will be set
 430         // according to this.
 431         $this->checkCollationConnection();
 432
 433         return true;
 434     }
 435
 436     /**
 437      * set source
 438      * @param   string  $source
 439      */
 440     function setSource($source)
 441     {
 442         $this->source = trim($source);
 443     }
 444
 445     /**
 446      * checks if the config folder still exists and terminates app if true
 447      */
 448     function checkConfigFolder()
 449     {
 450         // Refuse to work while there still might be some world writable dir:
 451         if (is_dir('./config')) {
 452             die('Remove "./config" directory before using phpMyAdmin!');
 453         }
 454     }
 455
 456     /**
 457      * check config source
 458      *
 459      * @return  boolean wether source is valid or not
 460      */
 461     function checkConfigSource()
 462     {
 463         if (! $this->getSource()) {
 464             // no configuration file set at all
 465             return false;
 466         }
 467
 468         if (! file_exists($this->getSource())) {
 469             // do not trigger error here
 470             // https://sf.net/tracker/?func=detail&aid=1370269&group_id=23067&atid=377408
 471             /*
 472             trigger_error(
 473                 'phpMyAdmin-ERROR: unkown configuration source: ' . $source,
 474                 E_USER_WARNING);
 475             */
 476             $this->source_mtime = 0;
 477             return false;
 478         }
 479
 480         if (! is_readable($this->getSource())) {
 481             $this->source_mtime = 0;
 482             die('Existing configuration file (' . $this->getSource() . ') is not readable.');
 483         }
 484
 485         // Check for permissions (on platforms that support it):
 486         $perms = @fileperms($this->getSource());
 487         if (!($perms === false) && ($perms & 2)) {
 488             // This check is normally done after loading configuration
 489             $this->checkWebServerOs();
 490             if ($this->get('PMA_IS_WINDOWS') == 0) {
 491                 $this->source_mtime = 0;
 492                 die('Wrong permissions on configuration file, should not be world writable!');
 493             }
 494         }
 495
 496         return true;
 497     }
 498
 499     /**
 500      * returns specific config setting
 501      * @param   string  $setting
 502      * @return  mixed   value
 503      */
 504     function get($setting)
 505     {
 506         if (isset($this->settings[$setting])) {
 507             return $this->settings[$setting];
 508         }
 509         return null;
 510     }
 511
 512     /**
 513      * sets configuration variable
 514      *
 515      * @uses    $this->settings
 516      * @param   string  $setting    configuration option
 517      * @param   string  $value      new value for configuration option
 518      */
 519     function set($setting, $value)
 520     {
 521         if (!isset($this->settings[$setting]) || $this->settings[$setting] != $value) {
 522             $this->settings[$setting] = $value;
 523             $this->set_mtime = time();
 524         }
 525     }
 526
 527     /**
 528      * returns source for current config
 529      * @return  string  config source
 530      */
 531     function getSource()
 532     {
 533         return $this->source;
 534     }
 535
 536     /**
 537      * old PHP 4 style constructor
 538      *
 539      * @deprecated
 540      */
 541     function PMA_Config($source = null)
 542     {
 543         $this->__construct($source);
 544     }
 545
 546     /**
 547      * returns a unique value to force a CSS reload if either the config
 548      * or the theme changes;
 549      * must also check the pma_fontsize cookie in case there is no
 550      * config file
 551      * @return  int  Unix timestamp
 552      */
 553     function getThemeUniqueValue()
 554     {
 555         return intval((null !== $_SESSION['PMA_Config']->get('fontsize') ? $_SESSION['PMA_Config']->get('fontsize') : $_COOKIE['pma_fontsize'])) + ($this->source_mtime + $this->default_source_mtime + $_SESSION['PMA_Theme']->mtime_info + $_SESSION['PMA_Theme']->filesize_info);
 556     }
 557
 558     /**
 559      * $cfg['PmaAbsoluteUri'] is a required directive else cookies won't be
 560      * set properly and, depending on browsers, inserting or updating a
 561      * record might fail
 562      */
 563     function checkPmaAbsoluteUri()
 564     {
 565         // Setup a default value to let the people and lazy syadmins work anyway,
 566         // they'll get an error if the autodetect code doesn't work
 567         $pma_absolute_uri = $this->get('PmaAbsoluteUri');
 568         $is_https = $this->get('is_https');
 569
 570         if (strlen($pma_absolute_uri) < 5
 571             // needed to catch http/https switch
 572             || ($is_https && substr($pma_absolute_uri, 0, 6) != 'https:')
 573             || (!$is_https && substr($pma_absolute_uri, 0, 5) != 'http:')
 574         ) {
 575             $url = array();
 576
 577             // At first we try to parse REQUEST_URI, it might contain full URL
 578             if (PMA_getenv('REQUEST_URI')) {
 579                 $url = @parse_url(PMA_getenv('REQUEST_URI')); // produces E_WARNING if it cannot get parsed, e.g. '/foobar:/'
 580                 if ($url === false) {
 581                     $url = array('path' => $_SERVER['REQUEST_URI']);
 582                 }
 583             }
 584
 585             // If we don't have scheme, we didn't have full URL so we need to
 586             // dig deeper
 587             if (empty($url['scheme'])) {
 588                 // Scheme
 589                 if (PMA_getenv('HTTP_SCHEME')) {
 590                     $url['scheme'] = PMA_getenv('HTTP_SCHEME');
 591                 } else {
 592                     $url['scheme'] =
 593                         PMA_getenv('HTTPS') && strtolower(PMA_getenv('HTTPS')) != 'off'
 594                             ? 'https'
 595                             : 'http';
 596                 }
 597
 598                 // Host and port
 599                 if (PMA_getenv('HTTP_HOST')) {
 600                     if (strpos(PMA_getenv('HTTP_HOST'), ':') !== false) {
 601                         list($url['host'], $url['port']) =
 602                             explode(':', PMA_getenv('HTTP_HOST'));
 603                     } else {
 604                         $url['host'] = PMA_getenv('HTTP_HOST');
 605                     }
 606                 } elseif (PMA_getenv('SERVER_NAME')) {
 607                     $url['host'] = PMA_getenv('SERVER_NAME');
 608                 } else {
 609                     $this->error_pma_uri = true;
 610                     return false;
 611                 }
 612
 613                 // If we didn't set port yet...
 614                 if (empty($url['port']) && PMA_getenv('SERVER_PORT')) {
 615                     $url['port'] = PMA_getenv('SERVER_PORT');
 616                 }
 617
 618                 // And finally the path could be already set from REQUEST_URI
 619                 if (empty($url['path'])) {
 620                     if (PMA_getenv('PATH_INFO')) {
 621                         $path = parse_url(PMA_getenv('PATH_INFO'));
 622                     } else {
 623                         // PHP_SELF in CGI often points to cgi executable, so use it
 624                         // as last choice
 625                         $path = parse_url(PMA_getenv('PHP_SELF'));
 626                     }
 627                     $url['path'] = $path['path'];
 628                 }
 629             }
 630
 631             // Make url from parts we have
 632             $pma_absolute_uri = $url['scheme'] . '://';
 633             // Was there user information?
 634             if (!empty($url['user'])) {
 635                 $pma_absolute_uri .= $url['user'];
 636                 if (!empty($url['pass'])) {
 637                     $pma_absolute_uri .= ':' . $url['pass'];
 638                 }
 639                 $pma_absolute_uri .= '@';
 640             }
 641             // Add hostname
 642             $pma_absolute_uri .= $url['host'];
 643             // Add port, if it not the default one
 644             if (! empty($url['port'])
 645               && (($url['scheme'] == 'http' && $url['port'] != 80)
 646                 || ($url['scheme'] == 'https' && $url['port'] != 443))) {
 647                 $pma_absolute_uri .= ':' . $url['port'];
 648             }
 649             // And finally path, without script name, the 'a' is there not to
 650             // strip our directory, when path is only /pmadir/ without filename.
 651             // Backslashes returned by Windows have to be changed.
 652             // Only replace backslashes by forward slashes if on Windows,
 653             // as the backslash could be valid on a non-Windows system.
 654             if ($this->get('PMA_IS_WINDOWS') == 1) {
 655                 $path = str_replace("\\", "/", dirname($url['path'] . 'a'));
 656             } else {
 657                 $path = dirname($url['path'] . 'a');
 658             }
 659
 660             // To work correctly within transformations overview:
 661             if (defined('PMA_PATH_TO_BASEDIR') && PMA_PATH_TO_BASEDIR == '../../') {
 662                 if ($this->get('PMA_IS_WINDOWS') == 1) {
 663                     $path = str_replace("\\", "/", dirname(dirname($path)));
 664                 } else {
 665                     $path = dirname(dirname($path));
 666                 }
 667             }
 668             // in vhost situations, there could be already an ending slash
 669             if (substr($path, -1) != '/') {
 670                 $path .= '/';
 671             }
 672             $pma_absolute_uri .= $path;
 673
 674             // We used to display a warning if PmaAbsoluteUri wasn't set, but now
 675             // the autodetect code works well enough that we don't display the
 676             // warning at all. The user can still set PmaAbsoluteUri manually.
 677             // See
 678             // http://sf.net/tracker/?func=detail&aid=1257134&group_id=23067&atid=377411
 679
 680         } else {
 681             // The URI is specified, however users do often specify this
 682             // wrongly, so we try to fix this.
 683
 684             // Adds a trailing slash et the end of the phpMyAdmin uri if it
 685             // does not exist.
 686             if (substr($pma_absolute_uri, -1) != '/') {
 687                 $pma_absolute_uri .= '/';
 688             }
 689
 690             // If URI doesn't start with http:// or https://, we will add
 691             // this.
 692             if (substr($pma_absolute_uri, 0, 7) != 'http://'
 693               && substr($pma_absolute_uri, 0, 8) != 'https://') {
 694                 $pma_absolute_uri =
 695                     (PMA_getenv('HTTPS') && strtolower(PMA_getenv('HTTPS')) != 'off'
 696                         ? 'https'
 697                         : 'http')
 698                     . ':' . (substr($pma_absolute_uri, 0, 2) == '//' ? '' : '//')
 699                     . $pma_absolute_uri;
 700             }
 701         }
 702         $this->set('PmaAbsoluteUri', $pma_absolute_uri);
 703     }
 704
 705     /**
 706      * check selected collation_connection
 707      * @todo check validity of $_REQUEST['collation_connection']
 708      */
 709     function checkCollationConnection()
 710     {
 711         // (could be improved by executing it after the MySQL connection only if
 712         //  PMA_MYSQL_INT_VERSION >= 40100)
 713         if (! empty($_REQUEST['collation_connection'])) {
 714             $this->set('collation_connection',
 715                 strip_tags($_REQUEST['collation_connection']));
 716         }
 717     }
 718
 719     /**
 720      * checks for font size configuration, and sets font size as requested by user
 721      *
 722      * @uses    $_GET
 723      * @uses    $_POST
 724      * @uses    $_COOKIE
 725      * @uses    preg_match()
 726      * @uses    function_exists()
 727      * @uses    PMA_Config::set()
 728      * @uses    PMA_Config::get()
 729      * @uses    PMA_setCookie()
 730      */
 731     function checkFontsize()
 732     {
 733         $new_fontsize = '';
 734
 735         if (isset($_GET['fontsize'])) {
 736             $new_fontsize = $_GET['fontsize'];
 737         } elseif (isset($_POST['fontsize'])) {
 738             $new_fontsize = $_POST['fontsize'];
 739         } elseif (isset($_COOKIE['pma_fontsize'])) {
 740             $new_fontsize = $_COOKIE['pma_fontsize'];
 741         }
 742
 743         if (preg_match('/^[0-9.]+(px|em|pt|\%)$/', $new_fontsize)) {
 744             $this->set('fontsize', $new_fontsize);
 745         } elseif (! $this->get('fontsize')) {
 746              // 80% would correspond to the default browser font size
 747              // of 16, but use 82% to help read the monoface font
 748             $this->set('fontsize', '82%');
 749         }
 750
 751         if (function_exists('PMA_setCookie')) {
 752             PMA_setCookie('pma_fontsize', $this->get('fontsize'), '82%');
 753         }
 754     }
 755
 756     /**
 757      * checks if upload is enabled
 758      *
 759      */
 760     function checkUpload()
 761     {
 762         if (ini_get('file_uploads')) {
 763             $this->set('enable_upload', true);
 764             // if set "php_admin_value file_uploads Off" in httpd.conf
 765             // ini_get() also returns the string "Off" in this case:
 766             if ('off' == strtolower(ini_get('file_uploads'))) {
 767                 $this->set('enable_upload', false);
 768             }
 769          } else {
 770             $this->set('enable_upload', false);
 771          }
 772     }
 773
 774     /**
 775      * Maximum upload size as limited by PHP
 776      * Used with permission from Moodle (http://moodle.org) by Martin Dougiamas
 777      *
 778      * this section generates $max_upload_size in bytes
 779      */
 780     function checkUploadSize()
 781     {
 782         if (! $filesize = ini_get('upload_max_filesize')) {
 783             $filesize = "5M";
 784         }
 785
 786         if ($postsize = ini_get('post_max_size')) {
 787             $this->set('max_upload_size',
 788                 min(PMA_get_real_size($filesize), PMA_get_real_size($postsize)));
 789         } else {
 790             $this->set('max_upload_size', PMA_get_real_size($filesize));
 791         }
 792     }
 793
 794     /**
 795      * check for https
 796      */
 797     function checkIsHttps()
 798     {
 799         $this->set('is_https', PMA_Config::isHttps());
 800     }
 801
 802     /**
 803      * @static
 804      */
 805     function isHttps()
 806     {
 807         $is_https = false;
 808
 809         $url = array();
 810
 811         // At first we try to parse REQUEST_URI, it might contain full URL,
 812         if (PMA_getenv('REQUEST_URI')) {
 813             $url = @parse_url(PMA_getenv('REQUEST_URI')); // produces E_WARNING if it cannot get parsed, e.g. '/foobar:/'
 814             if($url === false) {
 815                 $url = array();
 816             }
 817         }
 818
 819         // If we don't have scheme, we didn't have full URL so we need to
 820         // dig deeper
 821         if (empty($url['scheme'])) {
 822             // Scheme
 823             if (PMA_getenv('HTTP_SCHEME')) {
 824                 $url['scheme'] = PMA_getenv('HTTP_SCHEME');
 825             } else {
 826                 $url['scheme'] =
 827                     PMA_getenv('HTTPS') && strtolower(PMA_getenv('HTTPS')) != 'off'
 828                         ? 'https'
 829                         : 'http';
 830             }
 831         }
 832
 833         if (isset($url['scheme'])
 834           && $url['scheme'] == 'https') {
 835             $is_https = true;
 836         } else {
 837             $is_https = false;
 838         }
 839
 840         return $is_https;
 841     }
 842
 843     /**
 844      * detect correct cookie path
 845      */
 846     function checkCookiePath()
 847     {
 848         $this->set('cookie_path', PMA_Config::getCookiePath());
 849     }
 850
 851     /**
 852      * @static
 853      */
 854     function getCookiePath()
 855     {
 856         static $cookie_path = null;
 857
 858         if (null !== $cookie_path) {
 859             return $cookie_path;
 860         }
 861
 862         $url = '';
 863
 864         if (PMA_getenv('REQUEST_URI')) {
 865             $url = PMA_getenv('REQUEST_URI');
 866         }
 867
 868         // If we don't have path
 869         if (empty($url)) {
 870             if (PMA_getenv('PATH_INFO')) {
 871                 $url = PMA_getenv('PATH_INFO');
 872             // on IIS with PHP-CGI:
 873             } elseif (PMA_getenv('SCRIPT_NAME')) {
 874                 $url = PMA_getenv('SCRIPT_NAME');
 875             } elseif (PMA_getenv('PHP_SELF')) {
 876                 // PHP_SELF in CGI often points to cgi executable, so use it
 877                 // as last choice
 878                 $url = PMA_getenv('PHP_SELF');
 879             }
 880         }
 881
 882         $parsed_url = @parse_url($_SERVER['REQUEST_URI']); // produces E_WARNING if it cannot get parsed, e.g. '/foobar:/'
 883         if ($parsed_url === false || empty($parsed_url['path'])) {
 884             $parsed_url = array('path' => $url);
 885         }
 886
 887         $cookie_path   = substr($parsed_url['path'], 0, strrpos($parsed_url['path'], '/'))  . '/';
 888
 889         return $cookie_path;
 890     }
 891
 892     /**
 893      * enables backward compatibility
 894      */
 895     function enableBc()
 896     {
 897         $GLOBALS['cfg']             = $this->settings;
 898         $GLOBALS['default_server']  = $this->default_server;
 899         unset($this->default_server);
 900         $GLOBALS['collation_connection'] = $this->get('collation_connection');
 901         $GLOBALS['is_upload']       = $this->get('enable_upload');
 902         $GLOBALS['max_upload_size'] = $this->get('max_upload_size');
 903         $GLOBALS['cookie_path']     = $this->get('cookie_path');
 904         $GLOBALS['is_https']        = $this->get('is_https');
 905
 906         $defines = array(
 907             'PMA_VERSION',
 908             'PMA_THEME_VERSION',
 909             'PMA_THEME_GENERATION',
 910             'PMA_PHP_STR_VERSION',
 911             'PMA_PHP_INT_VERSION',
 912             'PMA_IS_WINDOWS',
 913             'PMA_IS_IIS',
 914             'PMA_IS_GD2',
 915             'PMA_USR_OS',
 916             'PMA_USR_BROWSER_VER',
 917             'PMA_USR_BROWSER_AGENT'
 918             );
 919
 920         foreach ($defines as $define) {
 921             if (! defined($define)) {
 922                 define($define, $this->get($define));
 923             }
 924         }
 925     }
 926
 927     /**
 928      * @todo finish
 929      */
 930     function save() {}
 931
 932     /**
 933      * returns options for font size selection
 934      *
 935      * @uses    preg_replace()
 936      * @uses    ksort()
 937      * @static
 938      * @param   string  $current_size   current selected font size with unit
 939      * @return  array   selectable font sizes
 940      */
 941     function getFontsizeOptions($current_size = '82%')
 942     {
 943         $unit = preg_replace('/[0-9.]*/', '', $current_size);
 944         $value = preg_replace('/[^0-9.]*/', '', $current_size);
 945
 946         $factors = array();
 947         $options = array();
 948         $options["$value"] = $value . $unit;
 949
 950         if ($unit === '%') {
 951             $factors[] = 1;
 952             $factors[] = 5;
 953             $factors[] = 10;
 954         } elseif ($unit === 'em') {
 955             $factors[] = 0.05;
 956             $factors[] = 0.2;
 957             $factors[] = 1;
 958         } elseif ($unit === 'pt') {
 959             $factors[] = 0.5;
 960             $factors[] = 2;
 961         } elseif ($unit === 'px') {
 962             $factors[] = 1;
 963             $factors[] = 5;
 964             $factors[] = 10;
 965         } else {
 966             //unknown font size unit
 967             $factors[] = 0.05;
 968             $factors[] = 0.2;
 969             $factors[] = 1;
 970             $factors[] = 5;
 971             $factors[] = 10;
 972         }
 973
 974         foreach ($factors as $key => $factor) {
 975             $option_inc = $value + $factor;
 976             $option_dec = $value - $factor;
 977             while (count($options) < 21) {
 978                 $options["$option_inc"] = $option_inc . $unit;
 979                 if ($option_dec > $factors[0]) {
 980                     $options["$option_dec"] = $option_dec . $unit;
 981                 }
 982                 $option_inc += $factor;
 983                 $option_dec -= $factor;
 984                 if (isset($factors[$key + 1])
 985                  && $option_inc >= $value + $factors[$key + 1]) {
 986                     break;
 987                 }
 988             }
 989         }
 990         ksort($options);
 991         return $options;
 992     }
 993
 994     /**
 995      * returns html selectbox for font sizes
 996      *
 997      * @uses    $_SESSION['PMA_Config']
 998      * @uses    PMA_Config::get()
 999      * @uses    PMA_Config::getFontsizeOptions()
1000      * @uses    $GLOBALS['strFontSize']
1001      * @static
1002      * @param   string  $current_size   currently slected font size with unit
1003      * @return  string  html selectbox
1004      */
1005     function getFontsizeSelection()
1006     {
1007         $current_size = $_SESSION['PMA_Config']->get('fontsize');
1008         // for the case when there is no config file (this is supported)
1009         if (empty($current_size)) {
1010             if (isset($_COOKIE['pma_fontsize'])) {
1011                 $current_size = $_COOKIE['pma_fontsize'];
1012             } else {
1013                 $current_size = '82%';
1014             }
1015         }
1016         $options = PMA_Config::getFontsizeOptions($current_size);
1017
1018         $return = '<label for="select_fontsize">' . $GLOBALS['strFontSize'] . ':</label>' . "\n";
1019         $return .= '<select name="fontsize" id="select_fontsize" onchange="this.form.submit();">' . "\n";
1020         foreach ($options as $option) {
1021             $return .= '<option value="' . $option . '"';
1022             if ($option == $current_size) {
1023                 $return .= ' selected="selected"';
1024             }
1025             $return .= '>' . $option . '</option>' . "\n";
1026         }
1027         $return .= '</select>';
1028
1029         return $return;
1030     }
1031
1032     /**
1033      * return complete font size selection form
1034      *
1035      * @uses    PMA_generate_common_hidden_inputs()
1036      * @uses    PMA_Config::getFontsizeSelection()
1037      * @uses    $GLOBALS['strGo']
1038      * @static
1039      * @param   string  $current_size   currently slected font size with unit
1040      * @return  string  html selectbox
1041      */
1042     function getFontsizeForm()
1043     {
1044         return '<form name="form_fontsize_selection" id="form_fontsize_selection"'
1045             . ' method="post" action="index.php" target="_parent">' . "\n"
1046             . PMA_generate_common_hidden_inputs() . "\n"
1047             . PMA_Config::getFontsizeSelection() . "\n"
1048             . '<noscript>' . "\n"
1049             . '<input type="submit" value="' . $GLOBALS['strGo'] . '" />' . "\n"
1050             . '</noscript>' . "\n"
1051             . '</form>';
1052     }
1053 }
1054 ?>