mirror of
https://github.com/php/web-php.git
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496c83383a
add it into all parts where we include stuff which exists. Also make the 404 page a bit more general.
274 lines
9.6 KiB
PHP
274 lines
9.6 KiB
PHP
<?php
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// $Id$
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/*
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This script handles all 401, 403 and 404 error redirects,
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and some directory requests (like /images). Uses the
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preferred language setting and the REQUEST_URI to guess what
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page should be displayed. In case there is no page that can
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be displayed, the user is redirected to a search page.
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*/
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// Ensure that our environment is set up
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include_once $_SERVER['DOCUMENT_ROOT'] . '/include/prepend.inc';
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include_once $_SERVER['DOCUMENT_ROOT'] . '/include/loadavg.inc';
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// Get URI for this request (without the leading slash, and
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// without any query string attached)
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// See langchooser.inc for more info on STRIPPED_URI
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// Also decode special URL parts, eg %20 into a space
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$URI = substr($_SERVER['STRIPPED_URI'], 1);
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$URI = urldecode(preg_replace("!(\\?.*$)!", "", $URI));
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// ============================================================================
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// For images, display a 404 automatically (no redirect)
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if (preg_match("!\\.(pdf|gif|jpg|png)$!i", $URI)) { make404(); }
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// ============================================================================
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// BC: handle .php3 files that were renamed to .php
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if (preg_match("!(.*\\.php)3$!", $URI, $array)) {
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mirror_redirect("/$array[1]");
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}
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// ============================================================================
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// BC: handle bugs.php moved completely to bugs.php.net
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if (preg_match("!^bugs.php?(.+)$!", $URI, $array)) {
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mirror_redirect("http://bugs.php.net/?$array[1]");
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}
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// ============================================================================
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// BC: handle moving english manual down into its own directory (also supports
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// default language manual accessibilty on mirror sites through /manual/filename)
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if (preg_match("!^manual(/[^/]*)$!", $URI, $array)) {
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mirror_redirect("/manual/$LANG$array[1]");
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} elseif (preg_match("!^manual/html/([^/]+)$!", $URI, $array)) {
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$array[1] = preg_replace("!.html$!", ".php", $array[1]);
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mirror_redirect("/manual/$LANG/print/$array[1]");
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}
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// ============================================================================
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// Printer friendly manual page handling. It's important that this is included,
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// and not redirected, as this way all relative URL's will retain their meaning
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// and point to pages relative to the print dir (which is nonexistent)
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// We need to override the 404 status in these cases too.
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if (preg_match("!^manual/(\\w+)/(print|printwn)/(.+\\.php)$!", $URI, $parts) &&
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@file_exists($_SERVER['DOCUMENT_ROOT'] . "/manual/$parts[1]/$parts[3]")) {
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status_header(200);
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$PRINT_PAGE = TRUE;
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if ($parts[2] == "printwn") { $PRINT_NOTES = TRUE; }
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include $_SERVER['DOCUMENT_ROOT'] . "/manual/$parts[1]/$parts[3]";
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exit;
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}
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// BC: for old HTML directory (.html extension was used in that)
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elseif (preg_match("!^manual/(\\w+)/html/(.+)\\.(html|php)$!", $URI, $parts) &&
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@file_exists($_SERVER['DOCUMENT_ROOT'] . "/manual/$parts[1]/$parts[2].php")) {
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status_header(200);
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$PRINT_PAGE = TRUE;
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include $_SERVER['DOCUMENT_ROOT'] . "/manual/$parts[1]/$parts[2].php";
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exit;
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}
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// The index file needs to be handled in a special way
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elseif (preg_match("!^manual/(\\w+)/(print|printwn|html)(/)?$!", $URI, $parts) &&
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@file_exists($_SERVER['DOCUMENT_ROOT'] . "/manual/$parts[1]/index.php")) {
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status_header(200);
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$PRINT_PAGE = TRUE;
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if ($parts[2] == "printwn") { $PRINT_NOTES = TRUE; }
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include $_SERVER['DOCUMENT_ROOT'] . "/manual/$parts[1]/index.php";
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exit;
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}
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// ============================================================================
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// Some nice URLs for getting something for download
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if (preg_match("!^get/([^/]+)$!", $URI, $what)) {
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switch ($what[1]) {
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case "php" : $URI = "downloads"; break;
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case "docs" : // intentional
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case "documentation" : $URI = "download-docs"; break;
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case "dochowto" : // intentional
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case "phpdochowto" : $URI = "getdochowto"; break;
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}
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}
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// ============================================================================
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// Nice URLs for download files, so wget works completely well with download links
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if (preg_match("!^get/([^/]+)/from/([^/]+)(/mirror)?$!", $URI, $dlinfo)) {
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$df = $dlinfo[1];
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// Mirror selection page
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if ($dlinfo[2] == "a") {
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status_header(200);
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include_once $_SERVER['DOCUMENT_ROOT'] . "/include/get-download.inc";
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exit;
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}
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// The same mirror is selected
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if ($dlinfo[2] == "this") { $mr = $MYSITE; }
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// Some other mirror is selected
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else { $mr = "http://{$dlinfo[2]}/"; }
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// Start the download process
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status_header(200);
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include $_SERVER['DOCUMENT_ROOT'] . "/include/do-download.inc";
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download_file($mr, $df);
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exit;
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}
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// Work with lowercased URI from now
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$URI = strtolower($URI);
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// ============================================================================
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// Define shortcuts for PHP files, manual pages and external redirects
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$uri_aliases = array (
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# PHP page shortcuts
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"download" => "downloads",
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"getphp" => "downloads",
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"getdocs" => "download-docs",
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"documentation" => "docs",
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"mailinglists" => "mailing-lists",
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"mailinglist" => "mailing-lists",
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"changelog" => "ChangeLog-4",
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"gethelp" => "support",
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"help" => "support",
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"unsubscribe" => "unsub",
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"subscribe" => "mailing-lists",
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"logos" => "download-logos",
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# manual shortcuts
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"ini" => "configuration",
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"install" => "installation",
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"intro" => "introduction",
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"whatis" => "introduction",
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"whatisphp" => "introduction",
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"what_is_php" => "introduction",
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"windows" => "install.windows",
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"win32" => "install.windows",
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"globals" => "language.variables.predefined",
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"register_globals" => "security.registerglobals",
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"registerglobals" => "security.registerglobals",
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"gd" => "image",
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"tut" => "tutorial",
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"tut.php" => "tutorial", // BC
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"faq.php" => "faq", // BC
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"bugs.php" => "bugs", // BC
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"bugstats.php" => "bugstats", // BC
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"icap" => "mcal", // mcal is the successor of icap
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"news.php" => "news-2003", // BC
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"README.mirror" => "mirroring", // BC
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"ZEND_CHANGES.txt" => "zend-engine-2.php", // BC
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"zend2_example.phps" => "zend-engine-2.php", // BC
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"manual/about-notes.php" => "manual/add-note", // BC
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# external shortcut aliases ;)
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"dochowto" => "phpdochowto",
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"projects.php" => "projects", // BC
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);
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$external_redirects = array(
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"php4news" => "http://cvs.php.net/cvs.php/php-src/NEWS?onb=1.1247.2",
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"php5news" => "http://cvs.php.net/co.php/php-src/NEWS?p=1",
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"projects" => "http://freshmeat.net/browse/183/",
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"pear" => "http://pear.php.net/",
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"bugs" => "http://bugs.php.net/",
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"bugstats" => "http://bugs.php.net/bugstats.php",
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"phpdochowto" => "/manual/howto/index.html",
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"getdochowto" => "http://cvs.php.net/co.php/phpdoc/howto/howto.html.tar.gz?p=1",
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"rev" => "/manual/$LANG/revcheck.html.gz",
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"blog" => "/manual/$LANG/build.log.gz",
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);
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// ============================================================================
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// "Rewrite" the URL, if it was a shortcut
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if (isset($uri_aliases[$URI])) {
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$URI = $uri_aliases[$URI];
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}
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// ============================================================================
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// Redirect if the entered URI was a PHP page name (except the books page,
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// which we display in the mirror's language or the explicitly specified
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// language [see below])
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if (!in_array($URI, array('books', 'mirror-info', 'error')) &&
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file_exists($_SERVER['DOCUMENT_ROOT'] . "/$URI.php")) {
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mirror_redirect("/$URI.php");
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}
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// ============================================================================
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// Execute external redirect if a rule exists for the URI
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if (isset($external_redirects[$URI])) {
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mirror_redirect($external_redirects[$URI]);
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}
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// Temporary hack for books and mirror-info, until all the pages
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// will be capable of being included from anywhere
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if (in_array($URI, array('books', 'mirror-info'))) {
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status_header(200);
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include_once $_SERVER['DOCUMENT_ROOT'] . "/$URI.php";
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}
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// ============================================================================
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// Try to find the page using the preferred language as a manual page
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include_once $_SERVER['DOCUMENT_ROOT'] . "/include/manual-lookup.inc";
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$try = find_manual_page($LANG, $URI);
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if ($try) {
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status_header(200);
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include_once $_SERVER['DOCUMENT_ROOT'] . $try;
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exit;
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}
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// ============================================================================
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// If no match was found till this point, the last action is to start a
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// search with the URI the user typed in
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$fallback = (myphpnet_urlsearch() === MYPHPNET_URL_MANUAL ? "manual" : "quickref");
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mirror_redirect(
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'/search.php?show=' . $fallback . '&lang=' . urlencode($LANG) .
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'&pattern=' . urlencode(substr($_SERVER['REQUEST_URI'], 1))
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);
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// A 'good looking' 404 error message page
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function make404()
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{
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global $_SERVER;
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status_header(404);
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site_header('404 Not Found');
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echo "<h1>Not Found</h1>\n" .
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"<p><strong>" . htmlspecialchars($_SERVER['REQUEST_URI']) .
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"</strong> not found on this server.</p>\n";
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site_footer();
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exit;
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}
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// Send out a proper status header
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function status_header($num)
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{
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// Set status text
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switch ($num) {
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case 404: $status = "Not Found"; break;
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case 200: $status = "OK"; break;
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default: return FALSE;
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}
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// BC code for PHP < 4.3.0
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@header("HTTP/1.1 $num $status");
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@header("Status: $num $status", TRUE, $num);
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return TRUE;
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}
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?>
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