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', '2.11.6');
  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         // avoid "headers already sent" error when file contains a BOM
 376         ob_start();
 377         if (function_exists('file_get_contents')) {
 378             $eval_result =
 379                 eval('?>' . trim(file_get_contents($this->getSource())));
 380         } else {
 381             $eval_result =
 382                 eval('?>' . trim(implode("\n", file($this->getSource()))));
 383         }
 384         ob_end_clean();
 385         error_reporting($old_error_reporting);
 386
 387         if ($eval_result === false) {
 388             $this->error_config_file = true;
 389         } else  {
 390             $this->error_config_file = false;
 391             $this->source_mtime = filemtime($this->getSource());
 392         }
 393
 394         /**
 395          * Backward compatibility code
 396          */
 397         if (!empty($cfg['DefaultTabTable'])) {
 398             $cfg['DefaultTabTable'] = str_replace('_properties', '', str_replace('tbl_properties.php', 'tbl_sql.php', $cfg['DefaultTabTable']));
 399         }
 400         if (!empty($cfg['DefaultTabDatabase'])) {
 401             $cfg['DefaultTabDatabase'] = str_replace('_details', '', str_replace('db_details.php', 'db_sql.php', $cfg['DefaultTabDatabase']));
 402         }
 403
 404         $this->checkFontsize();
 405         //$this->checkPmaAbsoluteUri();
 406         $this->settings = PMA_array_merge_recursive($this->settings, $cfg);
 407
 408         // Handling of the collation must be done after merging of $cfg
 409         // (from config.inc.php) so that $cfg['DefaultConnectionCollation']
 410         // can have an effect. Note that the presence of collation
 411         // information in a cookie has priority over what is defined
 412         // in the default or user's config files.
 413         /**
 414          * @todo check validity of $_COOKIE['pma_collation_connection']
 415          */
 416         if (! empty($_COOKIE['pma_collation_connection'])) {
 417             $this->set('collation_connection',
 418                 strip_tags($_COOKIE['pma_collation_connection']));
 419         } else {
 420             $this->set('collation_connection',
 421                 $this->get('DefaultConnectionCollation'));
 422         }
 423         // Now, a collation information could come from REQUEST
 424         // (an example of this: the collation selector in main.php)
 425         // so the following handles the setting of collation_connection
 426         // and later, in common.inc.php, the cookie will be set
 427         // according to this.
 428         $this->checkCollationConnection();
 429
 430         return true;
 431     }
 432
 433     /**
 434      * set source
 435      * @param   string  $source
 436      */
 437     function setSource($source)
 438     {
 439         $this->source = trim($source);
 440     }
 441
 442     /**
 443      * checks if the config folder still exists and terminates app if true
 444      */
 445     function checkConfigFolder()
 446     {
 447         // Refuse to work while there still might be some world writable dir:
 448         if (is_dir('./config')) {
 449             die('Remove "./config" directory before using phpMyAdmin!');
 450         }
 451     }
 452
 453     /**
 454      * check config source
 455      *
 456      * @return  boolean wether source is valid or not
 457      */
 458     function checkConfigSource()
 459     {
 460         if (! $this->getSource()) {
 461             // no configuration file set at all
 462             return false;
 463         }
 464
 465         if (! file_exists($this->getSource())) {
 466             // do not trigger error here
 467             // https://sf.net/tracker/?func=detail&aid=1370269&group_id=23067&atid=377408
 468             /*
 469             trigger_error(
 470                 'phpMyAdmin-ERROR: unkown configuration source: ' . $source,
 471                 E_USER_WARNING);
 472             */
 473             $this->source_mtime = 0;
 474             return false;
 475         }
 476
 477         if (! is_readable($this->getSource())) {
 478             $this->source_mtime = 0;
 479             die('Existing configuration file (' . $this->getSource() . ') is not readable.');
 480         }
 481
 482         // Check for permissions (on platforms that support it):
 483         $perms = @fileperms($this->getSource());
 484         if (!($perms === false) && ($perms & 2)) {
 485             // This check is normally done after loading configuration
 486             $this->checkWebServerOs();
 487             if ($this->get('PMA_IS_WINDOWS') == 0) {
 488                 $this->source_mtime = 0;
 489                 die('Wrong permissions on configuration file, should not be world writable!');
 490             }
 491         }
 492
 493         return true;
 494     }
 495
 496     /**
 497      * returns specific config setting
 498      * @param   string  $setting
 499      * @return  mixed   value
 500      */
 501     function get($setting)
 502     {
 503         if (isset($this->settings[$setting])) {
 504             return $this->settings[$setting];
 505         }
 506         return null;
 507     }
 508
 509     /**
 510      * sets configuration variable
 511      *
 512      * @uses    $this->settings
 513      * @param   string  $setting    configuration option
 514      * @param   string  $value      new value for configuration option
 515      */
 516     function set($setting, $value)
 517     {
 518         if (!isset($this->settings[$setting]) || $this->settings[$setting] != $value) {
 519             $this->settings[$setting] = $value;
 520             $this->set_mtime = time();
 521         }
 522     }
 523
 524     /**
 525      * returns source for current config
 526      * @return  string  config source
 527      */
 528     function getSource()
 529     {
 530         return $this->source;
 531     }
 532
 533     /**
 534      * old PHP 4 style constructor
 535      *
 536      * @deprecated
 537      */
 538     function PMA_Config($source = null)
 539     {
 540         $this->__construct($source);
 541     }
 542
 543     /**
 544      * returns a unique value to force a CSS reload if either the config
 545      * or the theme changes
 546      * @return  int  Unix timestamp
 547      */
 548     function getThemeUniqueValue()
 549     {
 550         return intval($_SESSION['PMA_Config']->get('fontsize')) + ($this->source_mtime + $this->default_source_mtime + $_SESSION['PMA_Theme']->mtime_info + $_SESSION['PMA_Theme']->filesize_info);
 551     }
 552
 553     /**
 554      * $cfg['PmaAbsoluteUri'] is a required directive else cookies won't be
 555      * set properly and, depending on browsers, inserting or updating a
 556      * record might fail
 557      */
 558     function checkPmaAbsoluteUri()
 559     {
 560         // Setup a default value to let the people and lazy syadmins work anyway,
 561         // they'll get an error if the autodetect code doesn't work
 562         $pma_absolute_uri = $this->get('PmaAbsoluteUri');
 563         $is_https = $this->get('is_https');
 564
 565         if (strlen($pma_absolute_uri) < 5
 566             // needed to catch http/https switch
 567             || ($is_https && substr($pma_absolute_uri, 0, 6) != 'https:')
 568             || (!$is_https && substr($pma_absolute_uri, 0, 5) != 'http:')
 569         ) {
 570             $url = array();
 571
 572             // At first we try to parse REQUEST_URI, it might contain full URL
 573             if (PMA_getenv('REQUEST_URI')) {
 574                 $url = @parse_url(PMA_getenv('REQUEST_URI')); // produces E_WARNING if it cannot get parsed, e.g. '/foobar:/'
 575                 if ($url === false) {
 576                     $url = array('path' => $_SERVER['REQUEST_URI']);
 577                 }
 578             }
 579
 580             // If we don't have scheme, we didn't have full URL so we need to
 581             // dig deeper
 582             if (empty($url['scheme'])) {
 583                 // Scheme
 584                 if (PMA_getenv('HTTP_SCHEME')) {
 585                     $url['scheme'] = PMA_getenv('HTTP_SCHEME');
 586                 } else {
 587                     $url['scheme'] =
 588                         PMA_getenv('HTTPS') && strtolower(PMA_getenv('HTTPS')) != 'off'
 589                             ? 'https'
 590                             : 'http';
 591                 }
 592
 593                 // Host and port
 594                 if (PMA_getenv('HTTP_HOST')) {
 595                     if (strpos(PMA_getenv('HTTP_HOST'), ':') !== false) {
 596                         list($url['host'], $url['port']) =
 597                             explode(':', PMA_getenv('HTTP_HOST'));
 598                     } else {
 599                         $url['host'] = PMA_getenv('HTTP_HOST');
 600                     }
 601                 } elseif (PMA_getenv('SERVER_NAME')) {
 602                     $url['host'] = PMA_getenv('SERVER_NAME');
 603                 } else {
 604                     $this->error_pma_uri = true;
 605                     return false;
 606                 }
 607
 608                 // If we didn't set port yet...
 609                 if (empty($url['port']) && PMA_getenv('SERVER_PORT')) {
 610                     $url['port'] = PMA_getenv('SERVER_PORT');
 611                 }
 612
 613                 // And finally the path could be already set from REQUEST_URI
 614                 if (empty($url['path'])) {
 615                     if (PMA_getenv('PATH_INFO')) {
 616                         $path = parse_url(PMA_getenv('PATH_INFO'));
 617                     } else {
 618                         // PHP_SELF in CGI often points to cgi executable, so use it
 619                         // as last choice
 620                         $path = parse_url(PMA_getenv('PHP_SELF'));
 621                     }
 622                     $url['path'] = $path['path'];
 623                 }
 624             }
 625
 626             // Make url from parts we have
 627             $pma_absolute_uri = $url['scheme'] . '://';
 628             // Was there user information?
 629             if (!empty($url['user'])) {
 630                 $pma_absolute_uri .= $url['user'];
 631                 if (!empty($url['pass'])) {
 632                     $pma_absolute_uri .= ':' . $url['pass'];
 633                 }
 634                 $pma_absolute_uri .= '@';
 635             }
 636             // Add hostname
 637             $pma_absolute_uri .= $url['host'];
 638             // Add port, if it not the default one
 639             if (! empty($url['port'])
 640               && (($url['scheme'] == 'http' && $url['port'] != 80)
 641                 || ($url['scheme'] == 'https' && $url['port'] != 443))) {
 642                 $pma_absolute_uri .= ':' . $url['port'];
 643             }
 644             // And finally path, without script name, the 'a' is there not to
 645             // strip our directory, when path is only /pmadir/ without filename.
 646             // Backslashes returned by Windows have to be changed.
 647             // Only replace backslashes by forward slashes if on Windows,
 648             // as the backslash could be valid on a non-Windows system.
 649             if ($this->get('PMA_IS_WINDOWS') == 1) {
 650                 $path = str_replace("\\", "/", dirname($url['path'] . 'a'));
 651             } else {
 652                 $path = dirname($url['path'] . 'a');
 653             }
 654
 655             // To work correctly within transformations overview:
 656             if (defined('PMA_PATH_TO_BASEDIR') && PMA_PATH_TO_BASEDIR == '../../') {
 657                 if ($this->get('PMA_IS_WINDOWS') == 1) {
 658                     $path = str_replace("\\", "/", dirname(dirname($path)));
 659                 } else {
 660                     $path = dirname(dirname($path));
 661                 }
 662             }
 663             // in vhost situations, there could be already an ending slash
 664             if (substr($path, -1) != '/') {
 665                 $path .= '/';
 666             }
 667             $pma_absolute_uri .= $path;
 668
 669             // We used to display a warning if PmaAbsoluteUri wasn't set, but now
 670             // the autodetect code works well enough that we don't display the
 671             // warning at all. The user can still set PmaAbsoluteUri manually.
 672             // See
 673             // http://sf.net/tracker/?func=detail&aid=1257134&group_id=23067&atid=377411
 674
 675         } else {
 676             // The URI is specified, however users do often specify this
 677             // wrongly, so we try to fix this.
 678
 679             // Adds a trailing slash et the end of the phpMyAdmin uri if it
 680             // does not exist.
 681             if (substr($pma_absolute_uri, -1) != '/') {
 682                 $pma_absolute_uri .= '/';
 683             }
 684
 685             // If URI doesn't start with http:// or https://, we will add
 686             // this.
 687             if (substr($pma_absolute_uri, 0, 7) != 'http://'
 688               && substr($pma_absolute_uri, 0, 8) != 'https://') {
 689                 $pma_absolute_uri =
 690                     (PMA_getenv('HTTPS') && strtolower(PMA_getenv('HTTPS')) != 'off'
 691                         ? 'https'
 692                         : 'http')
 693                     . ':' . (substr($pma_absolute_uri, 0, 2) == '//' ? '' : '//')
 694                     . $pma_absolute_uri;
 695             }
 696         }
 697         $this->set('PmaAbsoluteUri', $pma_absolute_uri);
 698     }
 699
 700     /**
 701      * check selected collation_connection
 702      * @todo check validity of $_REQUEST['collation_connection']
 703      */
 704     function checkCollationConnection()
 705     {
 706         // (could be improved by executing it after the MySQL connection only if
 707         //  PMA_MYSQL_INT_VERSION >= 40100)
 708         if (! empty($_REQUEST['collation_connection'])) {
 709             $this->set('collation_connection',
 710                 strip_tags($_REQUEST['collation_connection']));
 711         }
 712     }
 713
 714     /**
 715      * checks for font size configuration, and sets font size as requested by user
 716      *
 717      * @uses    $_GET
 718      * @uses    $_POST
 719      * @uses    $_COOKIE
 720      * @uses    preg_match()
 721      * @uses    function_exists()
 722      * @uses    PMA_Config::set()
 723      * @uses    PMA_Config::get()
 724      * @uses    PMA_setCookie()
 725      */
 726     function checkFontsize()
 727     {
 728         $new_fontsize = '';
 729
 730         if (isset($_GET['fontsize'])) {
 731             $new_fontsize = $_GET['fontsize'];
 732         } elseif (isset($_POST['fontsize'])) {
 733             $new_fontsize = $_POST['fontsize'];
 734         } elseif (isset($_COOKIE['pma_fontsize'])) {
 735             $new_fontsize = $_COOKIE['pma_fontsize'];
 736         }
 737
 738         if (preg_match('/^[0-9.]+(px|em|pt|\%)$/', $new_fontsize)) {
 739             $this->set('fontsize', $new_fontsize);
 740         } elseif (! $this->get('fontsize')) {
 741              // 80% would correspond to the default browser font size
 742              // of 16, but use 82% to help read the monoface font
 743             $this->set('fontsize', '82%');
 744         }
 745
 746         if (function_exists('PMA_setCookie')) {
 747             PMA_setCookie('pma_fontsize', $this->get('fontsize'), '82%');
 748         }
 749     }
 750
 751     /**
 752      * checks if upload is enabled
 753      *
 754      */
 755     function checkUpload()
 756     {
 757         if (ini_get('file_uploads')) {
 758             $this->set('enable_upload', true);
 759             // if set "php_admin_value file_uploads Off" in httpd.conf
 760             // ini_get() also returns the string "Off" in this case:
 761             if ('off' == strtolower(ini_get('file_uploads'))) {
 762                 $this->set('enable_upload', false);
 763             }
 764          } else {
 765             $this->set('enable_upload', false);
 766          }
 767     }
 768
 769     /**
 770      * Maximum upload size as limited by PHP
 771      * Used with permission from Moodle (http://moodle.org) by Martin Dougiamas
 772      *
 773      * this section generates $max_upload_size in bytes
 774      */
 775     function checkUploadSize()
 776     {
 777         if (! $filesize = ini_get('upload_max_filesize')) {
 778             $filesize = "5M";
 779         }
 780
 781         if ($postsize = ini_get('post_max_size')) {
 782             $this->set('max_upload_size',
 783                 min(PMA_get_real_size($filesize), PMA_get_real_size($postsize)));
 784         } else {
 785             $this->set('max_upload_size', PMA_get_real_size($filesize));
 786         }
 787     }
 788
 789     /**
 790      * check for https
 791      */
 792     function checkIsHttps()
 793     {
 794         $this->set('is_https', PMA_Config::isHttps());
 795     }
 796
 797     /**
 798      * @static
 799      */
 800     function isHttps()
 801     {
 802         $is_https = false;
 803
 804         $url = array();
 805
 806         // At first we try to parse REQUEST_URI, it might contain full URL,
 807         if (PMA_getenv('REQUEST_URI')) {
 808             $url = @parse_url(PMA_getenv('REQUEST_URI')); // produces E_WARNING if it cannot get parsed, e.g. '/foobar:/'
 809             if($url === false) {
 810                 $url = array();
 811             }
 812         }
 813
 814         // If we don't have scheme, we didn't have full URL so we need to
 815         // dig deeper
 816         if (empty($url['scheme'])) {
 817             // Scheme
 818             if (PMA_getenv('HTTP_SCHEME')) {
 819                 $url['scheme'] = PMA_getenv('HTTP_SCHEME');
 820             } else {
 821                 $url['scheme'] =
 822                     PMA_getenv('HTTPS') && strtolower(PMA_getenv('HTTPS')) != 'off'
 823                         ? 'https'
 824                         : 'http';
 825             }
 826         }
 827
 828         if (isset($url['scheme'])
 829           && $url['scheme'] == 'https') {
 830             $is_https = true;
 831         } else {
 832             $is_https = false;
 833         }
 834
 835         return $is_https;
 836     }
 837
 838     /**
 839      * detect correct cookie path
 840      */
 841     function checkCookiePath()
 842     {
 843         $this->set('cookie_path', PMA_Config::getCookiePath());
 844     }
 845
 846     /**
 847      * @static
 848      */
 849     function getCookiePath()
 850     {
 851         static $cookie_path = null;
 852
 853         if (null !== $cookie_path) {
 854             return $cookie_path;
 855         }
 856
 857         $url = '';
 858
 859         if (PMA_getenv('REQUEST_URI')) {
 860             $url = PMA_getenv('REQUEST_URI');
 861         }
 862
 863         // If we don't have path
 864         if (empty($url)) {
 865             if (PMA_getenv('PATH_INFO')) {
 866                 $url = PMA_getenv('PATH_INFO');
 867             // on IIS with PHP-CGI:
 868             } elseif (PMA_getenv('SCRIPT_NAME')) {
 869                 $url = PMA_getenv('SCRIPT_NAME');
 870             } elseif (PMA_getenv('PHP_SELF')) {
 871                 // PHP_SELF in CGI often points to cgi executable, so use it
 872                 // as last choice
 873                 $url = PMA_getenv('PHP_SELF');
 874             }
 875         }
 876
 877         $parsed_url = @parse_url($_SERVER['REQUEST_URI']); // produces E_WARNING if it cannot get parsed, e.g. '/foobar:/'
 878         if ($parsed_url === false || empty($parsed_url['path'])) {
 879             $parsed_url = array('path' => $url);
 880         }
 881
 882         $cookie_path   = substr($parsed_url['path'], 0, strrpos($parsed_url['path'], '/'))  . '/';
 883
 884         return $cookie_path;
 885     }
 886
 887     /**
 888      * enables backward compatibility
 889      */
 890     function enableBc()
 891     {
 892         $GLOBALS['cfg']             = $this->settings;
 893         $GLOBALS['default_server']  = $this->default_server;
 894         unset($this->default_server);
 895         $GLOBALS['collation_connection'] = $this->get('collation_connection');
 896         $GLOBALS['is_upload']       = $this->get('enable_upload');
 897         $GLOBALS['max_upload_size'] = $this->get('max_upload_size');
 898         $GLOBALS['cookie_path']     = $this->get('cookie_path');
 899         $GLOBALS['is_https']        = $this->get('is_https');
 900
 901         $defines = array(
 902             'PMA_VERSION',
 903             'PMA_THEME_VERSION',
 904             'PMA_THEME_GENERATION',
 905             'PMA_PHP_STR_VERSION',
 906             'PMA_PHP_INT_VERSION',
 907             'PMA_IS_WINDOWS',
 908             'PMA_IS_IIS',
 909             'PMA_IS_GD2',
 910             'PMA_USR_OS',
 911             'PMA_USR_BROWSER_VER',
 912             'PMA_USR_BROWSER_AGENT'
 913             );
 914
 915         foreach ($defines as $define) {
 916             if (! defined($define)) {
 917                 define($define, $this->get($define));
 918             }
 919         }
 920     }
 921
 922     /**
 923      * @todo finish
 924      */
 925     function save() {}
 926
 927     /**
 928      * returns options for font size selection
 929      *
 930      * @uses    preg_replace()
 931      * @uses    ksort()
 932      * @static
 933      * @param   string  $current_size   current selected font size with unit
 934      * @return  array   selectable font sizes
 935      */
 936     function getFontsizeOptions($current_size = '82%')
 937     {
 938         $unit = preg_replace('/[0-9.]*/', '', $current_size);
 939         $value = preg_replace('/[^0-9.]*/', '', $current_size);
 940
 941         $factors = array();
 942         $options = array();
 943         $options["$value"] = $value . $unit;
 944
 945         if ($unit === '%') {
 946             $factors[] = 1;
 947             $factors[] = 5;
 948             $factors[] = 10;
 949         } elseif ($unit === 'em') {
 950             $factors[] = 0.05;
 951             $factors[] = 0.2;
 952             $factors[] = 1;
 953         } elseif ($unit === 'pt') {
 954             $factors[] = 0.5;
 955             $factors[] = 2;
 956         } elseif ($unit === 'px') {
 957             $factors[] = 1;
 958             $factors[] = 5;
 959             $factors[] = 10;
 960         } else {
 961             //unknown font size unit
 962             $factors[] = 0.05;
 963             $factors[] = 0.2;
 964             $factors[] = 1;
 965             $factors[] = 5;
 966             $factors[] = 10;
 967         }
 968
 969         foreach ($factors as $key => $factor) {
 970             $option_inc = $value + $factor;
 971             $option_dec = $value - $factor;
 972             while (count($options) < 21) {
 973                 $options["$option_inc"] = $option_inc . $unit;
 974                 if ($option_dec > $factors[0]) {
 975                     $options["$option_dec"] = $option_dec . $unit;
 976                 }
 977                 $option_inc += $factor;
 978                 $option_dec -= $factor;
 979                 if (isset($factors[$key + 1])
 980                  && $option_inc >= $value + $factors[$key + 1]) {
 981                     break;
 982                 }
 983             }
 984         }
 985         ksort($options);
 986         return $options;
 987     }
 988
 989     /**
 990      * returns html selectbox for font sizes
 991      *
 992      * @uses    $_SESSION['PMA_Config']
 993      * @uses    PMA_Config::get()
 994      * @uses    PMA_Config::getFontsizeOptions()
 995      * @uses    $GLOBALS['strFontSize']
 996      * @static
 997      * @param   string  $current_size   currently slected font size with unit
 998      * @return  string  html selectbox
 999      */
1000     function getFontsizeSelection()
1001     {
1002         $current_size = $_SESSION['PMA_Config']->get('fontsize');
1003         $options = PMA_Config::getFontsizeOptions($current_size);
1004
1005         $return = '<label for="select_fontsize">' . $GLOBALS['strFontSize'] . ':</label>' . "\n";
1006         $return .= '<select name="fontsize" id="select_fontsize" onchange="this.form.submit();">' . "\n";
1007         foreach ($options as $option) {
1008             $return .= '<option value="' . $option . '"';
1009             if ($option == $current_size) {
1010                 $return .= ' selected="selected"';
1011             }
1012             $return .= '>' . $option . '</option>' . "\n";
1013         }
1014         $return .= '</select>';
1015
1016         return $return;
1017     }
1018
1019     /**
1020      * return complete font size selection form
1021      *
1022      * @uses    PMA_generate_common_hidden_inputs()
1023      * @uses    PMA_Config::getFontsizeSelection()
1024      * @uses    $GLOBALS['strGo']
1025      * @static
1026      * @param   string  $current_size   currently slected font size with unit
1027      * @return  string  html selectbox
1028      */
1029     function getFontsizeForm()
1030     {
1031         return '<form name="form_fontsize_selection" id="form_fontsize_selection"'
1032             . ' method="post" action="index.php" target="_parent">' . "\n"
1033             . PMA_generate_common_hidden_inputs() . "\n"
1034             . PMA_Config::getFontsizeSelection() . "\n"
1035             . '<noscript>' . "\n"
1036             . '<input type="submit" value="' . $GLOBALS['strGo'] . '" />' . "\n"
1037             . '</noscript>' . "\n"
1038             . '</form>';
1039     }
1040 }
1041 ?>