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', '2.11.3');
  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('@Mozilla/([0-9].[0-9]{1,2})@', $HTTP_USER_AGENT, $log_version)) {
 182             $this->set('PMA_USR_BROWSER_VER', $log_version[1]);
 183             $this->set('PMA_USR_BROWSER_AGENT', 'MOZILLA');
 184         } else {
 185             $this->set('PMA_USR_BROWSER_VER', 0);
 186             $this->set('PMA_USR_BROWSER_AGENT', 'OTHER');
 187         }
 188     }
 189
 190     /**
 191      * Whether GD2 is present
 192      */
 193     function checkGd2()
 194     {
 195         if ($this->get('GD2Available') == 'yes') {
 196             $this->set('PMA_IS_GD2', 1);
 197         } elseif ($this->get('GD2Available') == 'no') {
 198             $this->set('PMA_IS_GD2', 0);
 199         } else {
 200             if (!@extension_loaded('gd')) {
 201                 PMA_dl('gd');
 202             }
 203             if (!@function_exists('imagecreatetruecolor')) {
 204                 $this->set('PMA_IS_GD2', 0);
 205             } else {
 206                 if (@function_exists('gd_info')) {
 207                     $gd_nfo = gd_info();
 208                     if (strstr($gd_nfo["GD Version"], '2.')) {
 209                         $this->set('PMA_IS_GD2', 1);
 210                     } else {
 211                         $this->set('PMA_IS_GD2', 0);
 212                     }
 213                 } else {
 214                     /* We must do hard way... */
 215                     ob_start();
 216                     phpinfo(INFO_MODULES); /* Only modules */
 217                     $a = strip_tags(ob_get_contents());
 218                     ob_end_clean();
 219                     /* Get GD version string from phpinfo output */
 220                     if (preg_match('@GD Version[[:space:]]*\(.*\)@', $a, $v)) {
 221                         if (strstr($v, '2.')) {
 222                             $this->set('PMA_IS_GD2', 1);
 223                         } else {
 224                             $this->set('PMA_IS_GD2', 0);
 225                         }
 226                     } else {
 227                         $this->set('PMA_IS_GD2', 0);
 228                     }
 229                 }
 230             }
 231         }
 232     }
 233
 234     /**
 235      * Whether the Web server php is running on is IIS
 236      */
 237     function checkWebServer()
 238     {
 239         if (PMA_getenv('SERVER_SOFTWARE')
 240           // some versions return Microsoft-IIS, some Microsoft/IIS
 241           // we could use a preg_match() but it's slower
 242           && stristr(PMA_getenv('SERVER_SOFTWARE'), 'Microsoft')
 243           && stristr(PMA_getenv('SERVER_SOFTWARE'), 'IIS')) {
 244             $this->set('PMA_IS_IIS', 1);
 245         } else {
 246             $this->set('PMA_IS_IIS', 0);
 247         }
 248     }
 249
 250     /**
 251      * Whether the os php is running on is windows or not
 252      */
 253     function checkWebServerOs()
 254     {
 255         // Default to Unix or Equiv
 256         $this->set('PMA_IS_WINDOWS', 0);
 257         // If PHP_OS is defined then continue
 258         if (defined('PHP_OS')) {
 259             if (stristr(PHP_OS, 'win')) {
 260                 // Is it some version of Windows
 261                 $this->set('PMA_IS_WINDOWS', 1);
 262             } elseif (stristr(PHP_OS, 'OS/2')) {
 263                 // Is it OS/2 (No file permissions like Windows)
 264                 $this->set('PMA_IS_WINDOWS', 1);
 265             }
 266         }
 267     }
 268
 269     /**
 270      * detects PHP version
 271      */
 272     function checkPhpVersion()
 273     {
 274         $match = array();
 275         if (! preg_match('@([0-9]{1,2}).([0-9]{1,2}).([0-9]{1,2})@',
 276                 phpversion(), $match)) {
 277             $result = preg_match('@([0-9]{1,2}).([0-9]{1,2})@',
 278                 phpversion(), $match);
 279         }
 280         if (isset($match) && ! empty($match[1])) {
 281             if (! isset($match[2])) {
 282                 $match[2] = 0;
 283             }
 284             if (! isset($match[3])) {
 285                 $match[3] = 0;
 286             }
 287             $this->set('PMA_PHP_INT_VERSION',
 288                 (int) sprintf('%d%02d%02d', $match[1], $match[2], $match[3]));
 289         } else {
 290             $this->set('PMA_PHP_INT_VERSION', 0);
 291         }
 292         $this->set('PMA_PHP_STR_VERSION', phpversion());
 293     }
 294
 295     /**
 296      * re-init object after loading from session file
 297      * checks config file for changes and relaods if neccessary
 298      */
 299     function __wakeup()
 300     {
 301         if (! $this->checkConfigSource()
 302           || $this->source_mtime !== filemtime($this->getSource())
 303           || $this->default_source_mtime !== filemtime($this->default_source)
 304           || $this->error_config_file
 305           || $this->error_config_default_file) {
 306             $this->settings = array();
 307             $this->load();
 308             $this->checkSystem();
 309         }
 310
 311         // check for https needs to be done everytime,
 312         // as https and http uses same session so this info can not be stored
 313         // in session
 314         $this->checkIsHttps();
 315
 316         $this->checkCollationConnection();
 317         $this->checkFontsize();
 318     }
 319
 320     /**
 321      * loads default values from default source
 322      *
 323      * @uses    file_exists()
 324      * @uses    $this->default_source
 325      * @uses    $this->error_config_default_file
 326      * @uses    $this->settings
 327      * @return  boolean     success
 328      */
 329     function loadDefaults()
 330     {
 331         $cfg = array();
 332         if (! file_exists($this->default_source)) {
 333             $this->error_config_default_file = true;
 334             return false;
 335         }
 336         include $this->default_source;
 337
 338         $this->default_source_mtime = filemtime($this->default_source);
 339
 340         $this->default_server = $cfg['Servers'][1];
 341         unset($cfg['Servers']);
 342
 343         $this->settings = PMA_array_merge_recursive($this->settings, $cfg);
 344
 345         $this->error_config_default_file = false;
 346
 347         return true;
 348     }
 349
 350     /**
 351      * loads configuration from $source, usally the config file
 352      * should be called on object creation and from __wakeup if config file
 353      * has changed
 354      *
 355      * @param   string $source  config file
 356      */
 357     function load($source = null)
 358     {
 359         $this->loadDefaults();
 360
 361         if (null !== $source) {
 362             $this->setSource($source);
 363         }
 364
 365         if (! $this->checkConfigSource()) {
 366             return false;
 367         }
 368
 369         $cfg = array();
 370
 371         /**
 372          * Parses the configuration file
 373          */
 374         $old_error_reporting = error_reporting(0);
 375         if (function_exists('file_get_contents')) {
 376             $eval_result =
 377                 eval('?>' . trim(file_get_contents($this->getSource())));
 378         } else {
 379             $eval_result =
 380                 eval('?>' . trim(implode("\n", file($this->getSource()))));
 381         }
 382         error_reporting($old_error_reporting);
 383
 384         if ($eval_result === false) {
 385             $this->error_config_file = true;
 386         } else  {
 387             $this->error_config_file = false;
 388             $this->source_mtime = filemtime($this->getSource());
 389         }
 390
 391         /**
 392          * Backward compatibility code
 393          */
 394         if (!empty($cfg['DefaultTabTable'])) {
 395             $cfg['DefaultTabTable'] = str_replace('_properties', '', str_replace('tbl_properties.php', 'tbl_sql.php', $cfg['DefaultTabTable']));
 396         }
 397         if (!empty($cfg['DefaultTabDatabase'])) {
 398             $cfg['DefaultTabDatabase'] = str_replace('_details', '', str_replace('db_details.php', 'db_sql.php', $cfg['DefaultTabDatabase']));
 399         }
 400
 401         $this->checkFontsize();
 402         //$this->checkPmaAbsoluteUri();
 403         $this->settings = PMA_array_merge_recursive($this->settings, $cfg);
 404
 405         // Handling of the collation must be done after merging of $cfg
 406         // (from config.inc.php) so that $cfg['DefaultConnectionCollation']
 407         // can have an effect. Note that the presence of collation
 408         // information in a cookie has priority over what is defined
 409         // in the default or user's config files.
 410         /**
 411          * @todo check validity of $_COOKIE['pma_collation_connection']
 412          */
 413         if (! empty($_COOKIE['pma_collation_connection'])) {
 414             $this->set('collation_connection',
 415                 strip_tags($_COOKIE['pma_collation_connection']));
 416         } else {
 417             $this->set('collation_connection',
 418                 $this->get('DefaultConnectionCollation'));
 419         }
 420         // Now, a collation information could come from REQUEST
 421         // (an example of this: the collation selector in main.php)
 422         // so the following handles the setting of collation_connection
 423         // and later, in common.inc.php, the cookie will be set
 424         // according to this.
 425         $this->checkCollationConnection();
 426
 427         return true;
 428     }
 429
 430     /**
 431      * set source
 432      * @param   string  $source
 433      */
 434     function setSource($source)
 435     {
 436         $this->source = trim($source);
 437     }
 438
 439     /**
 440      * checks if the config folder still exists and terminates app if true
 441      */
 442     function checkConfigFolder()
 443     {
 444         // Refuse to work while there still might be some world writable dir:
 445         if (is_dir('./config')) {
 446             die('Remove "./config" directory before using phpMyAdmin!');
 447         }
 448     }
 449
 450     /**
 451      * check config source
 452      *
 453      * @return  boolean wether source is valid or not
 454      */
 455     function checkConfigSource()
 456     {
 457         if (! $this->getSource()) {
 458             // no configuration file set at all
 459             return false;
 460         }
 461
 462         if (! file_exists($this->getSource())) {
 463             // do not trigger error here
 464             // https://sf.net/tracker/?func=detail&aid=1370269&group_id=23067&atid=377408
 465             /*
 466             trigger_error(
 467                 'phpMyAdmin-ERROR: unkown configuration source: ' . $source,
 468                 E_USER_WARNING);
 469             */
 470             $this->source_mtime = 0;
 471             return false;
 472         }
 473
 474         if (! is_readable($this->getSource())) {
 475             $this->source_mtime = 0;
 476             die('Existing configuration file (' . $this->getSource() . ') is not readable.');
 477         }
 478
 479         // Check for permissions (on platforms that support it):
 480         $perms = @fileperms($this->getSource());
 481         if (!($perms === false) && ($perms & 2)) {
 482             // This check is normally done after loading configuration
 483             $this->checkWebServerOs();
 484             if ($this->get('PMA_IS_WINDOWS') == 0) {
 485                 $this->source_mtime = 0;
 486                 die('Wrong permissions on configuration file, should not be world writable!');
 487             }
 488         }
 489
 490         return true;
 491     }
 492
 493     /**
 494      * returns specific config setting
 495      * @param   string  $setting
 496      * @return  mixed   value
 497      */
 498     function get($setting)
 499     {
 500         if (isset($this->settings[$setting])) {
 501             return $this->settings[$setting];
 502         }
 503         return null;
 504     }
 505
 506     /**
 507      * sets configuration variable
 508      *
 509      * @uses    $this->settings
 510      * @param   string  $setting    configuration option
 511      * @param   string  $value      new value for configuration option
 512      */
 513     function set($setting, $value)
 514     {
 515         if (!isset($this->settings[$setting]) || $this->settings[$setting] != $value) {
 516             $this->settings[$setting] = $value;
 517             $this->set_mtime = time();
 518         }
 519     }
 520
 521     /**
 522      * returns source for current config
 523      * @return  string  config source
 524      */
 525     function getSource()
 526     {
 527         return $this->source;
 528     }
 529
 530     /**
 531      * old PHP 4 style constructor
 532      *
 533      * @deprecated
 534      */
 535     function PMA_Config($source = null)
 536     {
 537         $this->__construct($source);
 538     }
 539
 540     /**
 541      * returns a unique value to force a CSS reload if either the config
 542      * or the theme changes
 543      * @return  int  Unix timestamp
 544      */
 545     function getMtime()
 546     {
 547         return intval($_SESSION['PMA_Config']->get('fontsize')) + ($this->source_mtime + $this->default_source_mtime + $_SESSION['PMA_Theme']->mtime_info);
 548     }
 549
 550     /**
 551      * $cfg['PmaAbsoluteUri'] is a required directive else cookies won't be
 552      * set properly and, depending on browsers, inserting or updating a
 553      * record might fail
 554      */
 555     function checkPmaAbsoluteUri()
 556     {
 557         // Setup a default value to let the people and lazy syadmins work anyway,
 558         // they'll get an error if the autodetect code doesn't work
 559         $pma_absolute_uri = $this->get('PmaAbsoluteUri');
 560         $is_https = $this->get('is_https');
 561
 562         if (strlen($pma_absolute_uri) < 5
 563             // needed to catch http/https switch
 564             || ($is_https && substr($pma_absolute_uri, 0, 6) != 'https:')
 565             || (!$is_https && substr($pma_absolute_uri, 0, 5) != 'http:')
 566         ) {
 567             $url = array();
 568
 569             // At first we try to parse REQUEST_URI, it might contain full URL
 570             if (PMA_getenv('REQUEST_URI')) {
 571                 $url = @parse_url(PMA_getenv('REQUEST_URI')); // produces E_WARNING if it cannot get parsed, e.g. '/foobar:/'
 572                 if ($url === false) {
 573                     $url = array('path' => $_SERVER['REQUEST_URI']);
 574                 }
 575             }
 576
 577             // If we don't have scheme, we didn't have full URL so we need to
 578             // dig deeper
 579             if (empty($url['scheme'])) {
 580                 // Scheme
 581                 if (PMA_getenv('HTTP_SCHEME')) {
 582                     $url['scheme'] = PMA_getenv('HTTP_SCHEME');
 583                 } else {
 584                     $url['scheme'] =
 585                         PMA_getenv('HTTPS') && strtolower(PMA_getenv('HTTPS')) != 'off'
 586                             ? 'https'
 587                             : 'http';
 588                 }
 589
 590                 // Host and port
 591                 if (PMA_getenv('HTTP_HOST')) {
 592                     if (strpos(PMA_getenv('HTTP_HOST'), ':') !== false) {
 593                         list($url['host'], $url['port']) =
 594                             explode(':', PMA_getenv('HTTP_HOST'));
 595                     } else {
 596                         $url['host'] = PMA_getenv('HTTP_HOST');
 597                     }
 598                 } elseif (PMA_getenv('SERVER_NAME')) {
 599                     $url['host'] = PMA_getenv('SERVER_NAME');
 600                 } else {
 601                     $this->error_pma_uri = true;
 602                     return false;
 603                 }
 604
 605                 // If we didn't set port yet...
 606                 if (empty($url['port']) && PMA_getenv('SERVER_PORT')) {
 607                     $url['port'] = PMA_getenv('SERVER_PORT');
 608                 }
 609
 610                 // And finally the path could be already set from REQUEST_URI
 611                 if (empty($url['path'])) {
 612                     if (PMA_getenv('PATH_INFO')) {
 613                         $path = parse_url(PMA_getenv('PATH_INFO'));
 614                     } else {
 615                         // PHP_SELF in CGI often points to cgi executable, so use it
 616                         // as last choice
 617                         $path = parse_url(PMA_getenv('PHP_SELF'));
 618                     }
 619                     $url['path'] = $path['path'];
 620                 }
 621             }
 622
 623             // Make url from parts we have
 624             $pma_absolute_uri = $url['scheme'] . '://';
 625             // Was there user information?
 626             if (!empty($url['user'])) {
 627                 $pma_absolute_uri .= $url['user'];
 628                 if (!empty($url['pass'])) {
 629                     $pma_absolute_uri .= ':' . $url['pass'];
 630                 }
 631                 $pma_absolute_uri .= '@';
 632             }
 633             // Add hostname
 634             $pma_absolute_uri .= $url['host'];
 635             // Add port, if it not the default one
 636             if (! empty($url['port'])
 637               && (($url['scheme'] == 'http' && $url['port'] != 80)
 638                 || ($url['scheme'] == 'https' && $url['port'] != 443))) {
 639                 $pma_absolute_uri .= ':' . $url['port'];
 640             }
 641             // And finally path, without script name, the 'a' is there not to
 642             // strip our directory, when path is only /pmadir/ without filename.
 643             // Backslashes returned by Windows have to be changed.
 644             // Only replace backslashes by forward slashes if on Windows,
 645             // as the backslash could be valid on a non-Windows system.
 646             if ($this->get('PMA_IS_WINDOWS') == 1) {
 647                 $path = str_replace("\\", "/", dirname($url['path'] . 'a'));
 648             } else {
 649                 $path = dirname($url['path'] . 'a');
 650             }
 651
 652             // To work correctly within transformations overview:
 653             if (defined('PMA_PATH_TO_BASEDIR') && PMA_PATH_TO_BASEDIR == '../../') {
 654                 if ($this->get('PMA_IS_WINDOWS') == 1) {
 655                     $path = str_replace("\\", "/", dirname(dirname($path)));
 656                 } else {
 657                     $path = dirname(dirname($path));
 658                 }
 659             }
 660             // in vhost situations, there could be already an ending slash
 661             if (substr($path, -1) != '/') {
 662                 $path .= '/';
 663             }
 664             $pma_absolute_uri .= $path;
 665
 666             // We used to display a warning if PmaAbsoluteUri wasn't set, but now
 667             // the autodetect code works well enough that we don't display the
 668             // warning at all. The user can still set PmaAbsoluteUri manually.
 669             // See
 670             // http://sf.net/tracker/?func=detail&aid=1257134&group_id=23067&atid=377411
 671
 672         } else {
 673             // The URI is specified, however users do often specify this
 674             // wrongly, so we try to fix this.
 675
 676             // Adds a trailing slash et the end of the phpMyAdmin uri if it
 677             // does not exist.
 678             if (substr($pma_absolute_uri, -1) != '/') {
 679                 $pma_absolute_uri .= '/';
 680             }
 681
 682             // If URI doesn't start with http:// or https://, we will add
 683             // this.
 684             if (substr($pma_absolute_uri, 0, 7) != 'http://'
 685               && substr($pma_absolute_uri, 0, 8) != 'https://') {
 686                 $pma_absolute_uri =
 687                     (PMA_getenv('HTTPS') && strtolower(PMA_getenv('HTTPS')) != 'off'
 688                         ? 'https'
 689                         : 'http')
 690                     . ':' . (substr($pma_absolute_uri, 0, 2) == '//' ? '' : '//')
 691                     . $pma_absolute_uri;
 692             }
 693         }
 694         $this->set('PmaAbsoluteUri', $pma_absolute_uri);
 695     }
 696
 697     /**
 698      * check selected collation_connection
 699      * @todo check validity of $_REQUEST['collation_connection']
 700      */
 701     function checkCollationConnection()
 702     {
 703         // (could be improved by executing it after the MySQL connection only if
 704         //  PMA_MYSQL_INT_VERSION >= 40100)
 705         if (! empty($_REQUEST['collation_connection'])) {
 706             $this->set('collation_connection',
 707                 strip_tags($_REQUEST['collation_connection']));
 708         }
 709     }
 710
 711     /**
 712      * checks for font size configuration, and sets font size as requested by user
 713      *
 714      * @uses    $_GET
 715      * @uses    $_POST
 716      * @uses    $_COOKIE
 717      * @uses    preg_match()
 718      * @uses    function_exists()
 719      * @uses    PMA_Config::set()
 720      * @uses    PMA_Config::get()
 721      * @uses    PMA_setCookie()
 722      */
 723     function checkFontsize()
 724     {
 725         $new_fontsize = '';
 726
 727         if (isset($_GET['fontsize'])) {
 728             $new_fontsize = $_GET['fontsize'];
 729         } elseif (isset($_POST['fontsize'])) {
 730             $new_fontsize = $_POST['fontsize'];
 731         } elseif (isset($_COOKIE['pma_fontsize'])) {
 732             $new_fontsize = $_COOKIE['pma_fontsize'];
 733         }
 734
 735         if (preg_match('/^[0-9.]+(px|em|pt|\%)$/', $new_fontsize)) {
 736             $this->set('fontsize', $new_fontsize);
 737         } elseif (! $this->get('fontsize')) {
 738              // 80% would correspond to the default browser font size
 739              // of 16, but use 82% to help read the monoface font
 740             $this->set('fontsize', '82%');
 741         }
 742
 743         if (function_exists('PMA_setCookie')) {
 744             PMA_setCookie('pma_fontsize', $this->get('fontsize'), '82%');
 745         }
 746     }
 747
 748     /**
 749      * checks if upload is enabled
 750      *
 751      */
 752     function checkUpload()
 753     {
 754         if (ini_get('file_uploads')) {
 755             $this->set('enable_upload', true);
 756             // if set "php_admin_value file_uploads Off" in httpd.conf
 757             // ini_get() also returns the string "Off" in this case:
 758             if ('off' == strtolower(ini_get('file_uploads'))) {
 759                 $this->set('enable_upload', false);
 760             }
 761          } else {
 762             $this->set('enable_upload', false);
 763          }
 764     }
 765
 766     /**
 767      * Maximum upload size as limited by PHP
 768      * Used with permission from Moodle (http://moodle.org) by Martin Dougiamas
 769      *
 770      * this section generates $max_upload_size in bytes
 771      */
 772     function checkUploadSize()
 773     {
 774         if (! $filesize = ini_get('upload_max_filesize')) {
 775             $filesize = "5M";
 776         }
 777
 778         if ($postsize = ini_get('post_max_size')) {
 779             $this->set('max_upload_size',
 780                 min(PMA_get_real_size($filesize), PMA_get_real_size($postsize)));
 781         } else {
 782             $this->set('max_upload_size', PMA_get_real_size($filesize));
 783         }
 784     }
 785
 786     /**
 787      * check for https
 788      */
 789     function checkIsHttps()
 790     {
 791         $this->set('is_https', PMA_Config::isHttps());
 792     }
 793
 794     /**
 795      * @static
 796      */
 797     function isHttps()
 798     {
 799         $is_https = false;
 800
 801         $url = array();
 802
 803         // At first we try to parse REQUEST_URI, it might contain full URL,
 804         if (PMA_getenv('REQUEST_URI')) {
 805             $url = @parse_url(PMA_getenv('REQUEST_URI')); // produces E_WARNING if it cannot get parsed, e.g. '/foobar:/'
 806             if($url === false) {
 807                 $url = array();
 808             }
 809         }
 810
 811         // If we don't have scheme, we didn't have full URL so we need to
 812         // dig deeper
 813         if (empty($url['scheme'])) {
 814             // Scheme
 815             if (PMA_getenv('HTTP_SCHEME')) {
 816                 $url['scheme'] = PMA_getenv('HTTP_SCHEME');
 817             } else {
 818                 $url['scheme'] =
 819                     PMA_getenv('HTTPS') && strtolower(PMA_getenv('HTTPS')) != 'off'
 820                         ? 'https'
 821                         : 'http';
 822             }
 823         }
 824
 825         if (isset($url['scheme'])
 826           && $url['scheme'] == 'https') {
 827             $is_https = true;
 828         } else {
 829             $is_https = false;
 830         }
 831
 832         return $is_https;
 833     }
 834
 835     /**
 836      * detect correct cookie path
 837      */
 838     function checkCookiePath()
 839     {
 840         $this->set('cookie_path', PMA_Config::getCookiePath());
 841     }
 842
 843     /**
 844      * @static
 845      */
 846     function getCookiePath()
 847     {
 848         static $cookie_path = null;
 849
 850         if (null !== $cookie_path) {
 851             return $cookie_path;
 852         }
 853
 854         $url = '';
 855
 856         if (PMA_getenv('REQUEST_URI')) {
 857             $url = PMA_getenv('REQUEST_URI');
 858         }
 859
 860         // If we don't have path
 861         if (empty($url)) {
 862             if (PMA_getenv('PATH_INFO')) {
 863                 $url = PMA_getenv('PATH_INFO');
 864             } elseif (PMA_getenv('PHP_SELF')) {
 865                 // PHP_SELF in CGI often points to cgi executable, so use it
 866                 // as last choice
 867                 $url = PMA_getenv('PHP_SELF');
 868             } elseif (PMA_getenv('SCRIPT_NAME')) {
 869                 $url = PMA_getenv('PHP_SELF');
 870             }
 871         }
 872
 873         $parsed_url = @parse_url($_SERVER['REQUEST_URI']); // produces E_WARNING if it cannot get parsed, e.g. '/foobar:/'
 874         if ($parsed_url === false) {
 875             $parsed_url = array('path' => $url);
 876         }
 877
 878         $cookie_path   = substr($parsed_url['path'], 0, strrpos($parsed_url['path'], '/'))  . '/';
 879
 880         return $cookie_path;
 881     }
 882
 883     /**
 884      * enables backward compatibility
 885      */
 886     function enableBc()
 887     {
 888         $GLOBALS['cfg']             =& $this->settings;
 889         $GLOBALS['default_server']  =& $this->default_server;
 890         $GLOBALS['collation_connection'] = $this->get('collation_connection');
 891         $GLOBALS['is_upload']       = $this->get('enable_upload');
 892         $GLOBALS['max_upload_size'] = $this->get('max_upload_size');
 893         $GLOBALS['cookie_path']     = $this->get('cookie_path');
 894         $GLOBALS['is_https']        = $this->get('is_https');
 895
 896         $defines = array(
 897             'PMA_VERSION',
 898             'PMA_THEME_VERSION',
 899             'PMA_THEME_GENERATION',
 900             'PMA_PHP_STR_VERSION',
 901             'PMA_PHP_INT_VERSION',
 902             'PMA_IS_WINDOWS',
 903             'PMA_IS_IIS',
 904             'PMA_IS_GD2',
 905             'PMA_USR_OS',
 906             'PMA_USR_BROWSER_VER',
 907             'PMA_USR_BROWSER_AGENT'
 908             );
 909
 910         foreach ($defines as $define) {
 911             if (! defined($define)) {
 912                 define($define, $this->get($define));
 913             }
 914         }
 915     }
 916
 917     /**
 918      * @todo finish
 919      */
 920     function save() {}
 921
 922     /**
 923      * returns options for font size selection
 924      *
 925      * @uses    preg_replace()
 926      * @uses    ksort()
 927      * @static
 928      * @param   string  $current_size   current selected font size with unit
 929      * @return  array   selectable font sizes
 930      */
 931     function getFontsizeOptions($current_size = '82%')
 932     {
 933         $unit = preg_replace('/[0-9.]*/', '', $current_size);
 934         $value = preg_replace('/[^0-9.]*/', '', $current_size);
 935
 936         $factors = array();
 937         $options = array();
 938         $options["$value"] = $value . $unit;
 939
 940         if ($unit === '%') {
 941             $factors[] = 1;
 942             $factors[] = 5;
 943             $factors[] = 10;
 944         } elseif ($unit === 'em') {
 945             $factors[] = 0.05;
 946             $factors[] = 0.2;
 947             $factors[] = 1;
 948         } elseif ($unit === 'pt') {
 949             $factors[] = 0.5;
 950             $factors[] = 2;
 951         } elseif ($unit === 'px') {
 952             $factors[] = 1;
 953             $factors[] = 5;
 954             $factors[] = 10;
 955         } else {
 956             //unknown font size unit
 957             $factors[] = 0.05;
 958             $factors[] = 0.2;
 959             $factors[] = 1;
 960             $factors[] = 5;
 961             $factors[] = 10;
 962         }
 963
 964         foreach ($factors as $key => $factor) {
 965             $option_inc = $value + $factor;
 966             $option_dec = $value - $factor;
 967             while (count($options) < 21) {
 968                 $options["$option_inc"] = $option_inc . $unit;
 969                 if ($option_dec > $factors[0]) {
 970                     $options["$option_dec"] = $option_dec . $unit;
 971                 }
 972                 $option_inc += $factor;
 973                 $option_dec -= $factor;
 974                 if (isset($factors[$key + 1])
 975                  && $option_inc >= $value + $factors[$key + 1]) {
 976                     break;
 977                 }
 978             }
 979         }
 980         ksort($options);
 981         return $options;
 982     }
 983
 984     /**
 985      * returns html selectbox for font sizes
 986      *
 987      * @uses    $_SESSION['PMA_Config']
 988      * @uses    PMA_Config::get()
 989      * @uses    PMA_Config::getFontsizeOptions()
 990      * @uses    $GLOBALS['strFontSize']
 991      * @static
 992      * @param   string  $current_size   currently slected font size with unit
 993      * @return  string  html selectbox
 994      */
 995     function getFontsizeSelection()
 996     {
 997         $current_size = $_SESSION['PMA_Config']->get('fontsize');
 998         $options = PMA_Config::getFontsizeOptions($current_size);
 999
1000         $return = '<label for="select_fontsize">' . $GLOBALS['strFontSize'] . ':</label>' . "\n";
1001         $return .= '<select name="fontsize" id="select_fontsize" onchange="this.form.submit();">' . "\n";
1002         foreach ($options as $option) {
1003             $return .= '<option value="' . $option . '"';
1004             if ($option == $current_size) {
1005                 $return .= ' selected="selected"';
1006             }
1007             $return .= '>' . $option . '</option>' . "\n";
1008         }
1009         $return .= '</select>';
1010
1011         return $return;
1012     }
1013
1014     /**
1015      * return complete font size selection form
1016      *
1017      * @uses    PMA_generate_common_hidden_inputs()
1018      * @uses    PMA_Config::getFontsizeSelection()
1019      * @uses    $GLOBALS['strGo']
1020      * @static
1021      * @param   string  $current_size   currently slected font size with unit
1022      * @return  string  html selectbox
1023      */
1024     function getFontsizeForm()
1025     {
1026         return '<form name="form_fontsize_selection" id="form_fontsize_selection"'
1027             . ' method="post" action="index.php" target="_parent">' . "\n"
1028             . PMA_generate_common_hidden_inputs() . "\n"
1029             . PMA_Config::getFontsizeSelection() . "\n"
1030             . '<noscript>' . "\n"
1031             . '<input type="submit" value="' . $GLOBALS['strGo'] . '" />' . "\n"
1032             . '</noscript>' . "\n"
1033             . '</form>';
1034     }
1035 }
1036 ?>