MediaWiki  master
PHPVersionCheck.php
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1 <?php
21 // phpcs:disable Generic.Arrays.DisallowLongArraySyntax,PSR2.Classes.PropertyDeclaration,MediaWiki.Usage.DirUsage
22 // phpcs:disable Squiz.Scope.MemberVarScope.Missing,Squiz.Scope.MethodScope.Missing
23 // @phan-file-suppress PhanPluginDuplicateConditionalNullCoalescing
38  /* @var string The number of the MediaWiki version used. */
39  var $mwVersion = '1.34';
40 
41  /* @var array A mapping of PHP functions to PHP extensions. */
43  'mb_substr' => 'mbstring',
44  'xml_parser_create' => 'xml',
45  'ctype_digit' => 'ctype',
46  'json_decode' => 'json',
47  'iconv' => 'iconv',
48  'mime_content_type' => 'fileinfo',
49  );
50 
54  var $format = 'text';
55 
59  var $scriptPath = '/';
60 
66  function setFormat( $format ) {
67  $this->format = $format;
68  }
69 
75  function setScriptPath( $scriptPath ) {
76  $this->scriptPath = $scriptPath;
77  }
78 
95  function getPHPInfo( $impl = false ) {
96  if (
97  ( defined( 'HHVM_VERSION' ) && $impl !== 'PHP' ) ||
98  $impl === 'HHVM'
99  ) {
100  return array(
101  'implementation' => 'HHVM',
102  'version' => defined( 'HHVM_VERSION' ) ? HHVM_VERSION : 'undefined',
103  'vendor' => 'Facebook',
104  'upstreamSupported' => '3.18.5',
105  'minSupported' => '3.18.5',
106  'upgradeURL' => 'https://docs.hhvm.com/hhvm/installation/introduction',
107  );
108  }
109  return array(
110  'implementation' => 'PHP',
111  'version' => PHP_VERSION,
112  'vendor' => 'the PHP Group',
113  'upstreamSupported' => '5.6.0',
114  'minSupported' => '7.0.13',
115  'upgradeURL' => 'https://www.php.net/downloads.php',
116  );
117  }
118 
123  $phpInfo = $this->getPHPInfo();
124  $minimumVersion = $phpInfo['minSupported'];
125  $otherInfo = $this->getPHPInfo( $phpInfo['implementation'] === 'HHVM' ? 'PHP' : 'HHVM' );
126  if (
127  !function_exists( 'version_compare' )
128  || version_compare( $phpInfo['version'], $minimumVersion ) < 0
129  ) {
130  $shortText = "MediaWiki $this->mwVersion requires at least {$phpInfo['implementation']}"
131  . " version $minimumVersion or {$otherInfo['implementation']} version "
132  . "{$otherInfo['minSupported']}, you are using {$phpInfo['implementation']} "
133  . "{$phpInfo['version']}.";
134 
135  $longText = "Error: You might be using an older {$phpInfo['implementation']} version "
136  . "({$phpInfo['implementation']} {$phpInfo['version']}). \n"
137  . "MediaWiki $this->mwVersion needs {$phpInfo['implementation']}"
138  . " $minimumVersion or higher or {$otherInfo['implementation']} version "
139  . "{$otherInfo['minSupported']}.\n\nCheck if you have a"
140  . " newer PHP executable with a different name.\n\n";
141 
142  // phpcs:disable Generic.Files.LineLength
143  $longHtml = <<<HTML
144  Please consider <a href="{$phpInfo['upgradeURL']}">upgrading your copy of
145  {$phpInfo['implementation']}</a>.
146  {$phpInfo['implementation']} versions less than {$phpInfo['upstreamSupported']} are no
147  longer supported by {$phpInfo['vendor']} and will not receive
148  security or bugfix updates.
149  </p>
150  <p>
151  If for some reason you are unable to upgrade your {$phpInfo['implementation']} version,
152  you will need to <a href="https://www.mediawiki.org/wiki/Download">download</a> an
153  older version of MediaWiki from our website.
154  See our <a href="https://www.mediawiki.org/wiki/Compatibility#PHP">compatibility page</a>
155  for details of which versions are compatible with prior versions of {$phpInfo['implementation']}.
156 HTML;
157  // phpcs:enable Generic.Files.LineLength
158  $this->triggerError(
159  "Supported {$phpInfo['implementation']} versions",
160  $shortText,
161  $longText,
162  $longHtml
163  );
164  }
165  }
166 
170  function checkVendorExistence() {
171  if ( !file_exists( dirname( __FILE__ ) . '/../vendor/autoload.php' ) ) {
172  $shortText = "Installing some external dependencies (e.g. via composer) is required.";
173 
174  $longText = "Error: You are missing some external dependencies. \n"
175  . "MediaWiki now also has some external dependencies that need to be installed\n"
176  . "via composer or from a separate git repo. Please see\n"
177  . "https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries\n"
178  . "for help on installing the required components.";
179 
180  // phpcs:disable Generic.Files.LineLength
181  $longHtml = <<<HTML
182  MediaWiki now also has some external dependencies that need to be installed via
183  composer or from a separate git repo. Please see
184  <a href="https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries">mediawiki.org</a>
185  for help on installing the required components.
186 HTML;
187  // phpcs:enable Generic.Files.LineLength
188 
189  $this->triggerError( 'External dependencies', $shortText, $longText, $longHtml );
190  }
191  }
192 
197  $missingExtensions = array();
198  foreach ( $this->functionsExtensionsMapping as $function => $extension ) {
199  if ( !function_exists( $function ) ) {
200  $missingExtensions[] = $extension;
201  }
202  }
203 
204  if ( $missingExtensions ) {
205  $shortText = "Installing some PHP extensions is required.";
206 
207  $missingExtText = '';
208  $missingExtHtml = '';
209  $baseUrl = 'https://www.php.net';
210  foreach ( $missingExtensions as $ext ) {
211  $missingExtText .= " * $ext <$baseUrl/$ext>\n";
212  $missingExtHtml .= "<li><b>$ext</b> "
213  . "(<a href=\"$baseUrl/$ext\">more information</a>)</li>";
214  }
215 
216  $cliText = "Error: Missing one or more required components of PHP.\n"
217  . "You are missing a required extension to PHP that MediaWiki needs.\n"
218  . "Please install:\n" . $missingExtText;
219 
220  $longHtml = <<<HTML
221  You are missing a required extension to PHP that MediaWiki
222  requires to run. Please install:
223  <ul>
224  $missingExtHtml
225  </ul>
226 HTML;
227 
228  $this->triggerError( 'Required components', $shortText, $cliText, $longHtml );
229  }
230  }
231 
235  function outputHTMLHeader() {
236  $protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0';
237 
238  header( "$protocol 500 MediaWiki configuration Error" );
239  // Don't cache error pages! They cause no end of trouble...
240  header( 'Cache-control: none' );
241  header( 'Pragma: no-cache' );
242  }
243 
252  function getIndexErrorOutput( $title, $longHtml, $shortText ) {
253  $encLogo =
254  htmlspecialchars( str_replace( '//', '/', $this->scriptPath . '/' ) .
255  'resources/assets/mediawiki.png' );
256  $shortHtml = htmlspecialchars( $shortText );
257 
258  header( 'Content-type: text/html; charset=UTF-8' );
259 
260  $finalOutput = <<<HTML
261 <!DOCTYPE html>
262 <html lang="en" dir="ltr">
263  <head>
264  <meta charset="UTF-8" />
265  <title>MediaWiki {$this->mwVersion}</title>
266  <style media='screen'>
267  body {
268  color: #000;
269  background-color: #fff;
270  font-family: sans-serif;
271  padding: 2em;
272  text-align: center;
273  }
274  p, img, h1, h2, ul {
275  text-align: left;
276  margin: 0.5em 0 1em;
277  }
278  h1 {
279  font-size: 120%;
280  }
281  h2 {
282  font-size: 110%;
283  }
284  </style>
285  </head>
286  <body>
287  <img src="{$encLogo}" alt='The MediaWiki logo' />
288  <h1>MediaWiki {$this->mwVersion} internal error</h1>
289  <div class='error'>
290  <p>
291  {$shortHtml}
292  </p>
293  <h2>{$title}</h2>
294  <p>
295  {$longHtml}
296  </p>
297  </div>
298  </body>
299 </html>
300 HTML;
301 
302  return $finalOutput;
303  }
304 
318  function triggerError( $title, $shortText, $longText, $longHtml ) {
319  if ( $this->format === 'html' ) {
320  // Used by index.php and mw-config/index.php
321  $this->outputHTMLHeader();
322  $finalOutput = $this->getIndexErrorOutput( $title, $longHtml, $shortText );
323  } else {
324  // Used by Maintenance.php (CLI)
325  $finalOutput = $longText;
326  }
327 
328  echo "$finalOutput\n";
329  die( 1 );
330  }
331 }
332 
340 function wfEntryPointCheck( $format = 'text', $scriptPath = '/' ) {
341  $phpVersionCheck = new PHPVersionCheck();
342  $phpVersionCheck->setFormat( $format );
343  $phpVersionCheck->setScriptPath( $scriptPath );
344  $phpVersionCheck->checkRequiredPHPVersion();
345  $phpVersionCheck->checkVendorExistence();
346  $phpVersionCheck->checkExtensionExistence();
347 }
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Definition: LICENSE.txt:10
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Definition: deferred.txt:11
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Definition: hooks.txt:2633
The ContentHandler facility adds support for arbitrary content types on wiki instead of relying on wikitext for everything It was introduced in MediaWiki Each kind of and so on Built in content types as usual *javascript user provided javascript code *json simple implementation for use by etc *css user provided css code *text plain text In PHP
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for and distribution as defined by Sections through of this document Licensor shall mean the copyright owner or entity authorized by the copyright owner that is granting the License Legal Entity shall mean the union of the acting entity and all other entities that control are controlled by or are under common control with that entity For the purposes of this definition control direct or to cause the direction or management of such whether by contract or including but not limited to software source documentation and configuration files Object form shall mean any form resulting from mechanical transformation or translation of a Source including but not limited to compiled object generated and conversions to other media types Work shall mean the work of whether in Source or Object made available under the as indicated by a copyright notice that is included in or attached to the whether in Source or Object that is based or other modifications as a an original work of authorship For the purposes of this Derivative Works shall not include works that remain separable from
globals txt Globals are evil The original MediaWiki code relied on globals for processing context far too often MediaWiki development since then has been a story of slowly moving context out of global variables and into objects Storing processing context in object member variables allows those objects to be reused in a much more flexible way Consider the elegance of
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Definition: globals.txt:10
def download(url, dest)
Definition: Makefile.py:47
wfEntryPointCheck( $format='text', $scriptPath='/')
Check PHP version and that external dependencies are installed, and display an informative error if e...
setScriptPath( $scriptPath)
Set the script path used for images in HTML-formatted errors.
A helper class for throttling authentication attempts.
target page
title
This list may contain false positives That usually means there is additional text with links below the first Each row contains links to the first and second as well as the first line of the second redirect text
outputHTMLHeader()
Output headers that prevents error pages to be cached.
The ContentHandler facility adds support for arbitrary content types on wiki instead of relying on wikitext for everything It was introduced in MediaWiki Each kind of and so on Built in content types are
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Definition: maintenance.txt:1
setFormat( $format)
Set the format used for errors.
getIndexErrorOutput( $title, $longHtml, $shortText)
Returns an error page, which is suitable for output to the end user via a web browser.
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Some information about database access in MediaWiki By Tim January Database layout For information about the MediaWiki database such as a description of the tables and their please see
Definition: database.txt:2
namespace and then decline to actually register it file or subcat img or subcat $title
Definition: hooks.txt:925
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for and distribution as defined by Sections through of this document Licensor shall mean the copyright owner or entity authorized by the copyright owner that is granting the License Legal Entity shall mean the union of the acting entity and all other entities that control are controlled by or are under common control with that entity For the purposes of this definition control direct or to cause the direction or management of such whether by contract or including but not limited to software source documentation and configuration files Object form shall mean any form resulting from mechanical transformation or translation of a Source including but not limited to compiled object generated and conversions to other media types Work shall mean the work of whether in Source or Object made available under the as indicated by a copyright notice that is included in or attached to the whether in Source or Object that is based or other modifications as a an original work of authorship For the purposes of this Derivative Works shall not include works that remain separable or merely the Work and Derivative Works thereof Contribution shall mean any work of including the original version of the Work and any modifications or additions to that Work or Derivative Works that is intentionally submitted to Licensor for inclusion in the Work by the copyright owner or by an individual or Legal Entity authorized to submit on behalf of the copyright owner For the purposes of this submitted means any form of or written communication sent to the Licensor or its including but not limited to communication on electronic mailing source code control and issue tracking systems that are managed by
checkVendorExistence()
Displays an error, if the vendor/autoload.php file could not be found.
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Definition: distributors.txt:9
checkExtensionExistence()
Displays an error, if a PHP extension does not exist.
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injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
deferred txt A few of the database updates required by various functions here can be deferred until after the result page is displayed to the user For updating the view updating the linked to tables after a etc PHP does not yet have any way to tell the server to actually return and disconnect while still running these updates(as a Java servelet could)
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if(!is_readable( $file)) $ext
Definition: router.php:48
Using a hook running we can avoid having all this option specific stuff in our mainline code Using the function We ve cleaned up the code here by removing clumps of infrequently used code and moving them off somewhere else It s much easier for someone working with this code to see what s _really_ going on
Definition: hooks.txt:77
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checkRequiredPHPVersion()
Displays an error, if the installed PHP version does not meet the minimum requirement.
triggerError( $title, $shortText, $longText, $longHtml)
Display something vaguely comprehensible in the event of a totally unrecoverable error.
getPHPInfo( $impl=false)
Return the version of the installed PHP implementation.
if the prop value should be in the metadata multi language array format
Definition: hooks.txt:1641