REL1_33/php/PHPVersionCheck_8php_source.html

<?php

// phpcs:disable Generic.Arrays.DisallowLongArraySyntax,PSR2.Classes.PropertyDeclaration,MediaWiki.Usage.DirUsage

// phpcs:disable Squiz.Scope.MemberVarScope.Missing,Squiz.Scope.MethodScope.Missing

// @phan-file-suppress PhanPluginDuplicateConditionalNullCoalescing


class PHPVersionCheck {

    /* @var string The number of the MediaWiki version used. */

    var $mwVersion = '1.33';


    /* @var array A mapping of PHP functions to PHP extensions. */

    var $functionsExtensionsMapping = array(

        'mb_substr'   => 'mbstring',

        'xml_parser_create' => 'xml',

        'ctype_digit' => 'ctype',

        'json_decode' => 'json',

        'iconv'       => 'iconv',

        'mime_content_type' => 'fileinfo',

    );


    var $format = 'text';


    var $scriptPath = '/';


    function setFormat( $format ) {

        $this->format = $format;

    }


    function setScriptPath( $scriptPath ) {

        $this->scriptPath = $scriptPath;

    }


    function getPHPInfo( $impl = false ) {

        if (

            ( defined( 'HHVM_VERSION' ) && $impl !== 'PHP' ) ||

            $impl === 'HHVM'

        ) {

            return array(

                'implementation' => 'HHVM',

                'version' => defined( 'HHVM_VERSION' ) ? HHVM_VERSION : 'undefined',

                'vendor' => 'Facebook',

                'upstreamSupported' => '3.18.5',

                'minSupported' => '3.18.5',

                'upgradeURL' => 'https://docs.hhvm.com/hhvm/installation/introduction',

            );

        }

        return array(

            'implementation' => 'PHP',

            'version' => PHP_VERSION,

            'vendor' => 'the PHP Group',

            'upstreamSupported' => '7.2.0',

            'minSupported' => '7.0.13',

            'upgradeURL' => 'https://secure.php.net/downloads.php',

        );

    }


    function checkRequiredPHPVersion() {

        $phpInfo = $this->getPHPInfo();

        $minimumVersion = $phpInfo['minSupported'];

        $otherInfo = $this->getPHPInfo( $phpInfo['implementation'] === 'HHVM' ? 'PHP' : 'HHVM' );

        if (

            !function_exists( 'version_compare' )

            || version_compare( $phpInfo['version'], $minimumVersion ) < 0

        ) {

            $shortText = "MediaWiki $this->mwVersion requires at least {$phpInfo['implementation']}"

                . " version $minimumVersion or {$otherInfo['implementation']} version "

                . "{$otherInfo['minSupported']}, you are using {$phpInfo['implementation']} "

                . "{$phpInfo['version']}.";


            $longText = "Error: You might be using an older {$phpInfo['implementation']} version "

                . "({$phpInfo['implementation']} {$phpInfo['version']}). \n"

                . "MediaWiki $this->mwVersion needs {$phpInfo['implementation']}"

                . " $minimumVersion or higher or {$otherInfo['implementation']} version "

                . "{$otherInfo['minSupported']}.\n\nCheck if you have a"

                . " newer PHP executable with a different name.\n\n";


            // phpcs:disable Generic.Files.LineLength

            $longHtml = <<<HTML

            Please consider <a href="{$phpInfo['upgradeURL']}">upgrading your copy of

            {$phpInfo['implementation']}</a>.

            {$phpInfo['implementation']} versions less than {$phpInfo['upstreamSupported']} are no

            longer supported by {$phpInfo['vendor']} and will not receive

            security or bugfix updates.

        </p>

        <p>

            If for some reason you are unable to upgrade your {$phpInfo['implementation']} version,

            you will need to <a href="https://www.mediawiki.org/wiki/Download">download</a> an

            older version of MediaWiki from our website.

            See our <a href="https://www.mediawiki.org/wiki/Compatibility#PHP">compatibility page</a>

            for details of which versions are compatible with prior versions of {$phpInfo['implementation']}.

HTML;

            // phpcs:enable Generic.Files.LineLength

            $this->triggerError(

                "Supported {$phpInfo['implementation']} versions",

                $shortText,

                $longText,

                $longHtml

            );

        }

    }


    function checkVendorExistence() {

        if ( !file_exists( dirname( __FILE__ ) . '/../vendor/autoload.php' ) ) {

            $shortText = "Installing some external dependencies (e.g. via composer) is required.";


            $longText = "Error: You are missing some external dependencies. \n"

                . "MediaWiki now also has some external dependencies that need to be installed\n"

                . "via composer or from a separate git repo. Please see\n"

                . "https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries\n"

                . "for help on installing the required components.";


            // phpcs:disable Generic.Files.LineLength

            $longHtml = <<<HTML

        MediaWiki now also has some external dependencies that need to be installed via

        composer or from a separate git repo. Please see

        <a href="https://www.mediawiki.org/wiki/Download_from_Git#Fetch_external_libraries">mediawiki.org</a>

        for help on installing the required components.

HTML;

            // phpcs:enable Generic.Files.LineLength


            $this->triggerError( 'External dependencies', $shortText, $longText, $longHtml );

        }

    }


    function checkExtensionExistence() {

        $missingExtensions = array();

        foreach ( $this->functionsExtensionsMapping as $function => $extension ) {

            if ( !function_exists( $function ) ) {

                $missingExtensions[] = $extension;

            }

        }


        if ( $missingExtensions ) {

            $shortText = "Installing some PHP extensions is required.";


            $missingExtText = '';

            $missingExtHtml = '';

            $baseUrl = 'https://secure.php.net';

            foreach ( $missingExtensions as $ext ) {

                $missingExtText .= " * $ext <$baseUrl/$ext>\n";

                $missingExtHtml .= "<li><b>$ext</b> "

                    . "(<a href=\"$baseUrl/$ext\">more information</a>)</li>";

            }


            $cliText = "Error: Missing one or more required components of PHP.\n"

                . "You are missing a required extension to PHP that MediaWiki needs.\n"

                . "Please install:\n" . $missingExtText;


            $longHtml = <<<HTML

        You are missing a required extension to PHP that MediaWiki

        requires to run. Please install:

        <ul>

        $missingExtHtml

        </ul>

HTML;


            $this->triggerError( 'Required components', $shortText, $cliText, $longHtml );

        }

    }


    function outputHTMLHeader() {

        $protocol = isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0';


        header( "$protocol 500 MediaWiki configuration Error" );

        // Don't cache error pages!  They cause no end of trouble...

        header( 'Cache-control: none' );

        header( 'Pragma: no-cache' );

    }


    function getIndexErrorOutput( $title, $longHtml, $shortText ) {

        $encLogo =

            htmlspecialchars( str_replace( '//', '/', $this->scriptPath . '/' ) .

                'resources/assets/mediawiki.png' );

        $shortHtml = htmlspecialchars( $shortText );


        header( 'Content-type: text/html; charset=UTF-8' );


        $finalOutput = <<<HTML

<!DOCTYPE html>

<html lang="en" dir="ltr">

    <head>

        <meta charset="UTF-8" />

        <title>MediaWiki {$this->mwVersion}</title>

        <style media='screen'>

            body {

                color: #000;

                background-color: #fff;

                font-family: sans-serif;

                padding: 2em;

                text-align: center;

            }

            p, img, h1, h2, ul  {

                text-align: left;

                margin: 0.5em 0 1em;

            }

            h1 {

                font-size: 120%;

            }

            h2 {

                font-size: 110%;

            }

        </style>

    </head>

    <body>

        <img src="{$encLogo}" alt='The MediaWiki logo' />

        <h1>MediaWiki {$this->mwVersion} internal error</h1>

        <div class='error'>

        <p>

            {$shortHtml}

        </p>

        <h2>{$title}</h2>

        <p>

            {$longHtml}

        </p>

        </div>

    </body>

</html>

HTML;


        return $finalOutput;

    }


    function triggerError( $title, $shortText, $longText, $longHtml ) {

        if ( $this->format === 'html' ) {

            // Used by index.php and mw-config/index.php

            $this->outputHTMLHeader();

            $finalOutput = $this->getIndexErrorOutput( $title, $longHtml, $shortText );

        } else {

            // Used by Maintenance.php (CLI)

            $finalOutput = $longText;

        }


        echo "$finalOutput\n";

        die( 1 );

    }


}


function wfEntryPointCheck( $format = 'text', $scriptPath = '/' ) {

    $phpVersionCheck = new PHPVersionCheck();

    $phpVersionCheck->setFormat( $format );

    $phpVersionCheck->setScriptPath( $scriptPath );

    $phpVersionCheck->checkRequiredPHPVersion();

    $phpVersionCheck->checkVendorExistence();

    $phpVersionCheck->checkExtensionExistence();

}


and
and(b) You must cause any modified files to carry prominent notices stating that You changed the files

or
or
Definition APACHE-LICENSE-2.0.txt:114

by
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
Definition APACHE-LICENSE-2.0.txt:58

from
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
Definition APACHE-LICENSE-2.0.txt:46

href
shown</td >< td > a href
Definition All_system_messages.txt:2667

color
in the sidebar</td >< td > font color
Definition All_system_messages.txt:425

page
target page
Definition All_system_messages.txt:1267

will
</td >< td > &</td >< td > t want your writing to be edited mercilessly and redistributed at will
Definition All_system_messages.txt:1007

text
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
Definition All_system_messages.txt:1267

wfEntryPointCheck
wfEntryPointCheck( $format='text', $scriptPath='/')
Check PHP version and that external dependencies are installed, and display an informative error if e...
Definition PHPVersionCheck.php:340

PHPVersionCheck
Definition PHPVersionCheck.php:37

PHPVersionCheck\triggerError
triggerError( $title, $shortText, $longText, $longHtml)
Display something vaguely comprehensible in the event of a totally unrecoverable error.
Definition PHPVersionCheck.php:318

PHPVersionCheck\setFormat
setFormat( $format)
Set the format used for errors.
Definition PHPVersionCheck.php:66

PHPVersionCheck\$scriptPath
$scriptPath
Definition PHPVersionCheck.php:59

PHPVersionCheck\outputHTMLHeader
outputHTMLHeader()
Output headers that prevents error pages to be cached.
Definition PHPVersionCheck.php:235

PHPVersionCheck\setScriptPath
setScriptPath( $scriptPath)
Set the script path used for images in HTML-formatted errors.
Definition PHPVersionCheck.php:75

PHPVersionCheck\$format
$format
Definition PHPVersionCheck.php:54

PHPVersionCheck\checkExtensionExistence
checkExtensionExistence()
Displays an error, if a PHP extension does not exist.
Definition PHPVersionCheck.php:196

PHPVersionCheck\checkRequiredPHPVersion
checkRequiredPHPVersion()
Displays an error, if the installed PHP version does not meet the minimum requirement.
Definition PHPVersionCheck.php:122

PHPVersionCheck\checkVendorExistence
checkVendorExistence()
Displays an error, if the vendor/autoload.php file could not be found.
Definition PHPVersionCheck.php:170

PHPVersionCheck\$functionsExtensionsMapping
$functionsExtensionsMapping
Definition PHPVersionCheck.php:42

PHPVersionCheck\getPHPInfo
getPHPInfo( $impl=false)
Return the version of the installed PHP implementation.
Definition PHPVersionCheck.php:95

PHPVersionCheck\getIndexErrorOutput
getIndexErrorOutput( $title, $longHtml, $shortText)
Returns an error page, which is suitable for output to the end user via a web browser.
Definition PHPVersionCheck.php:252

PHPVersionCheck\$mwVersion
$mwVersion
Definition PHPVersionCheck.php:39

PHP
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
Definition contenthandler.txt:15

are
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
Definition contenthandler.txt:9

see
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:18

updates
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)

that
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 but it might have such a feature in the future We handle these by creating a deferred update object and putting those objects on a global then executing the whole list after the page is displayed We don t do anything smart like collating updates to the same table or such because the list is almost always going to have just one item on if that
Definition deferred.txt:13

as
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:22

of
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
database rows
Definition globals.txt:10

error
do that in ParserLimitReportFormat instead use this to modify the parameters of the image all existing parser cache entries will be invalid To avoid you ll need to handle that somehow(e.g. with the RejectParserCacheValue hook) because MediaWiki won 't do it for you. & $defaults error
Definition hooks.txt:2644

$title
namespace and then decline to actually register it file or subcat img or subcat $title
Definition hooks.txt:955

format
if the prop value should be in the metadata multi language array format
Definition hooks.txt:1651

on
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:86

copy
as see the revision history and available at free of to any person obtaining a copy of this software and associated documentation to deal in the Software without including without limitation the rights to copy
Definition LICENSE.txt:11

php
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:37

version
Prior to version
Definition maintenance.txt:1

array
The wiki should then use memcached to cache various data To use multiple just add more items to the array To increase the weight of a make its entry a array("192.168.0.1:11211", 2))

MediaWiki
A helper class for throttling authentication attempts.

div
div
Definition parserTests.txt:6850

title
title
Definition parserTests.txt:245

style
Bar style
Definition parserTests.txt:218

$ext
if(!is_readable( $file)) $ext
Definition router.php:48