common.lib.php

WEBGAME源码,有架设说明,只是非常简单

<?php
/* $Id: common.lib.php,v 2.211 2005/11/20 11:52:17 cybot_tm Exp $ */
// vim: expandtab sw=4 ts=4 sts=4:

/**
 * Misc stuff and functions used by almost all the scripts.
 * Among other things, it contains the advanced authentification work.
 */

/**
 * Order of sections for common.lib.php:
 *
 * some functions need the constants of libraries/defines.lib.php
 * and defines_mysql.lib.php
 *
 * the PMA_setFontSizes() function must be before the call to the
 * libraries/auth/cookie.auth.lib.php library
 *
 * the include of libraries/defines_mysql.lib.php must be after the connection
 * to db to get the MySql version
 *
 * the PMA_sqlAddslashes() function must be before the connection to db
 *
 * the authentication libraries must be before the connection to db but
 * after the PMA_isInto() function
 *
 * the PMA_mysqlDie() function must be before the connection to db but
 * after mysql extension has been loaded
 *
 * the PMA_mysqlDie() function needs the PMA_format_sql() Function
 *
 * ... so the required order is:
 *
 * - parsing of the configuration file
 * - load of the libraries/defines.lib.php library
 * - load of mysql extension (if necessary)
 * - definition of PMA_sqlAddslashes()
 * - definition of PMA_format_sql()
 * - definition of PMA_mysqlDie()
 * - definition of PMA_isInto()
 * - definition of PMA_setFontSizes()
 * - loading of an authentication library
 * - db connection
 * - authentication work
 * - load of the libraries/defines_mysql.lib.php library to get the MySQL
 *   release number
 * - other functions, respecting dependencies
 */

// grab_globals.lib.php should really go before common.lib.php
require_once('./libraries/grab_globals.lib.php');

/**
 * @var array   $GLOBALS['PMA_errors']  holds errors
 */
$GLOBALS['PMA_errors'] = array();

/**
 * Avoids undefined variables
 */
if (!isset($use_backquotes)) {
    $use_backquotes   = 0;
}
if (!isset($pos)) {
    $pos              = 0;
}

/**
 * 2004-06-30 rabus: Ensure, that $cfg variables are not set somwhere else
 * before including the config file.
 */
unset($cfg);

/**
 * Added messages while developing:
 */
if (file_exists('./lang/added_messages.php')) {
    include('./lang/added_messages.php');
}

/**
 * Set default configuration values.
 */
include './config.default.php';

// Remember default server config
$default_server = $cfg['Servers'][1];

// Drop all server, as they have to be configured by user
unset($cfg['Servers']);

/**
 * Parses the configuration file and gets some constants used to define
 * versions of phpMyAdmin/php/mysql...
 */
$old_error_reporting = error_reporting(0);
// We can not use include as it fails on parse error
if (file_exists('./config.inc.php')) {
    $config_fd = fopen('./config.inc.php', 'r');
    $result = eval('?>' . fread($config_fd, filesize('./config.inc.php')));
    fclose( $config_fd );
    unset( $config_fd );

    // Eval failed
    if ($result === FALSE || !isset($cfg['Servers'])) {
        // Creates fake settings
        $cfg = array('DefaultLang'           => 'en-iso-8859-1',
                        'AllowAnywhereRecoding' => FALSE);
        // Loads the language file
        require_once('./libraries/select_lang.lib.php');
        // Displays the error message
        // (do not use &amp; for parameters sent by header)
        header( 'Location: error.php'
                . '?lang='  . urlencode( $available_languages[$lang][2] )
                . '&char='  . urlencode( $charset )
                . '&dir='   . urlencode( $text_dir )
                . '&type='  . urlencode( $strError )
                . '&error=' . urlencode(
                    strtr( $strConfigFileError, array( '<br />' => '[br]' ) )
                    . '[br][br]' . '[a@./config.inc.php@_blank]config.inc.php[/a]' )
                . '&' . SID
                 );
        exit();
    }
    error_reporting($old_error_reporting);
    unset( $old_error_reporting, $result );
}

/**
 * Includes the language file if it hasn't been included yet
 */
require_once('./libraries/select_lang.lib.php');

/**
 * Servers array fixups.
 */
// Do we have some server?
if (!isset($cfg['Servers']) || count($cfg['Servers']) == 0) {
    // No server => create one with defaults
    $cfg['Servers'] = array(1 => $default_server);
} else {
    // We have server(s) => apply default config
    $new_servers = array();
    foreach($cfg['Servers'] as $key => $val) {
        if (!is_int($key) || $key < 1) {
            // Show error
            header( 'Location: error.php'
                    . '?lang='  . urlencode( $available_languages[$lang][2] )
                    . '&char='  . urlencode( $charset )
                    . '&dir='   . urlencode( $text_dir )
                    . '&type='  . urlencode( $strError )
                    . '&error=' . urlencode(
// FIXME: We could translate this message, however it's translations freeze right now:
                        sprintf( 'Invalid server index: "%s"', $key))
                    . '&' . SID
                     );
        }
        $new_servers[$key] = array_merge($default_server, $val);
    }
    $cfg['Servers'] = $new_servers;
    unset( $new_servers, $key, $val );
}

// Cleanup
unset($default_server);

/**
 * We really need this one!
 */
if (!function_exists('preg_replace')) {
    header( 'Location: error.php'
        . '?lang='  . urlencode( $available_languages[$lang][2] )
        . '&char='  . urlencode( $charset )
        . '&dir='   . urlencode( $text_dir )
        . '&type='  . urlencode( $strError )
        . '&error=' . urlencode(
            strtr( sprintf( $strCantLoad, 'pcre' ),
                array('<br />' => '[br]') ) )
        . '&' . SID
         );
    exit();
}

/**
 * Gets constants that defines the PHP version number.
 * This include must be located physically before any code that needs to
 * reference the constants, else PHP 3.0.16 won't be happy.
 */
require_once('./libraries/defines.lib.php');

/* Input sanitizing */
require_once('./libraries/sanitizing.lib.php');

// XSS
if (isset($convcharset)) {
    $convcharset = PMA_sanitize($convcharset);
}

if ( ! defined( 'PMA_MINIMUM_COMMON' ) ) {
    /**
     * Define $is_upload
     */

      $is_upload = TRUE;
      if (strtolower(@ini_get('file_uploads')) == 'off'
             || @ini_get('file_uploads') == 0) {
          $is_upload = FALSE;
      }

    /**
     * Maximum upload size as limited by PHP
     * Used with permission from Moodle (http://moodle.org) by Martin Dougiamas
     *
     * this section generates $max_upload_size in bytes
     */

    function get_real_size($size=0) {
    /// Converts numbers like 10M into bytes
        if (!$size) {
            return 0;
        }
        $scan['MB'] = 1048576;
        $scan['Mb'] = 1048576;
        $scan['M'] = 1048576;
        $scan['m'] = 1048576;
        $scan['KB'] = 1024;
        $scan['Kb'] = 1024;
        $scan['K'] = 1024;
        $scan['k'] = 1024;

        while (list($key) = each($scan)) {
            if ((strlen($size)>strlen($key))&&(substr($size, strlen($size) - strlen($key))==$key)) {
                $size = substr($size, 0, strlen($size) - strlen($key)) * $scan[$key];
                break;
            }
        }
        return $size;
    } // end function


    if (!$filesize = ini_get('upload_max_filesize')) {
        $filesize = "5M";
    }
    $max_upload_size = get_real_size($filesize);

    if ($postsize = ini_get('post_max_size')) {
        $postsize = get_real_size($postsize);
        if ($postsize < $max_upload_size) {
            $max_upload_size = $postsize;
        }
    }
    unset($filesize);
    unset($postsize);

    /**
     * other functions for maximum upload work
     */

    /**
     * Displays the maximum size for an upload
     *
     * @param   integer  the size
     *
     * @return  string   the message
     *
     * @access  public
     */
     function PMA_displayMaximumUploadSize($max_upload_size) {
         list($max_size, $max_unit) = PMA_formatByteDown($max_upload_size);
         return '(' . sprintf($GLOBALS['strMaximumSize'], $max_size, $max_unit) . ')';
     }

    /**
     * Generates a hidden field which should indicate to the browser
     * the maximum size for upload
     *
     * @param   integer  the size
     *
     * @return  string   the INPUT field
     *
     * @access  public
     */
     function PMA_generateHiddenMaxFileSize($max_size){
         return '<input type="hidden" name="MAX_FILE_SIZE" value="' .$max_size . '" />';
     }

    /**
     * Charset conversion.
     */
    require_once('./libraries/charset_conversion.lib.php');

    /**
     * String handling
     */
    require_once('./libraries/string.lib.php');
}

/**
 * Removes insecure parts in a path; used before include() or
 * require() when a part of the path comes from an insecure source
 * like a cookie or form.
 *
 * @param    string  The path to check
 *
 * @return   string  The secured path
 *
 * @access  public
 * @author  Marc Delisle ([e-mail])
 */
function PMA_securePath($path) {

    // change .. to .
    $path = preg_replace('@\.\.*@','.',$path);

    return $path;
} // end function

// If zlib output compression is set in the php configuration file, no
// output buffering should be run
if (@ini_get('zlib.output_compression')) {
    $cfg['OBGzip'] = FALSE;
}

// disable output-buffering (if set to 'auto') for IE6, else enable it.
if (strtolower($cfg['OBGzip']) == 'auto') {
    if (PMA_USR_BROWSER_AGENT == 'IE' && PMA_USR_BROWSER_VER >= 6 && PMA_USR_BROWSER_VER < 7) {
        $cfg['OBGzip'] = FALSE;
    } else {
        $cfg['OBGzip'] = TRUE;
    }
}


/* Theme Manager
 * 2004-05-20 Michael Keck (mail_at_michaelkeck_dot_de)
 *            This little script checks if there're themes available
 *            and if the directory $ThemePath/$theme/img/ exists
 *            If not, it will use default images
*/
// Allow different theme per server
$theme_cookie_name = 'pma_theme';
if ($GLOBALS['cfg']['ThemePerServer'] && isset($server)) {
    $theme_cookie_name .= '-' . $server;
}
//echo $theme_cookie_name;
// Theme Manager
if (!$cfg['ThemeManager'] || !isset($_COOKIE[$theme_cookie_name]) || empty($_COOKIE[$theme_cookie_name])){
    $GLOBALS['theme'] = $cfg['ThemeDefault'];
    $ThemeDefaultOk = FALSE;