Mediawiki 1.15.3-scripts

[autoinstallsdev/mediawiki.git] / install-utils.inc

diff --git a/install-utils.inc b/install-utils.inc
index 6a99ec5535a413ed02ebfff42344201c69521357..36465b6421c358259e34b917296814e21f44d460 100644 (file)
--- a/install-utils.inc
+++ b/install-utils.inc
@@ -1,5 +1,12 @@
 <?php
 
+/**
+ * This file contains functions used by the install script (config/index.php)
+ * and maintenance scripts. It is not loaded in normal web requests.
+ *
+ * @file
+ */
+
 function install_version_checks() {
        # We dare not turn output buffer _off_ since this will break completely
        # if PHP is globally configured to run through a gzip filter.
@@ -26,6 +33,26 @@ function install_version_checks() {
                        "or higher. ABORTING. (http://bugs.php.net/bug.php?id=34879 for details)\n";
                die( -1 );
        }
+       
+       $test = new PhpXmlBugTester();
+       if( !$test->ok ) {
+               echo "Your system has a combination of PHP and libxml2 versions which is buggy\n" .
+                       "and can cause hidden data corruption in MediaWiki and other web apps.\n" .
+                       "Upgrade to PHP 5.2.9 or later and libxml2 2.7.3 or later!\n" .
+                       "ABORTING (http://bugs.php.net/bug.php?id=45996 for details).\n";
+               die( -1 );
+       }
+       
+
+       $test = new PhpRefCallBugTester;
+       $test->execute();
+       if ( !$test->ok ) {
+               echo "PHP 5.3.1 is not compatible with MediaWiki due to a bug involving\n" .
+                       "reference parameters to __call. Upgrade to PHP 5.3.2 or higher, or \n" .
+                       "downgrade to PHP 5.3.0 to fix this.\n" .
+                       "ABORTING (see http://bugs.php.net/bug.php?id=50394 for details)\n";
+               die( -1 );
+       }
 
        global $wgCommandLineMode;
        $wgCommandLineMode = true;
@@ -62,6 +89,52 @@ function copydirectory( $source, $dest ) {
        }
 }
 
+/**
+ * Test for PHP+libxml2 bug which breaks XML input subtly with certain versions.
+ * http://bugs.php.net/bug.php?id=45996
+ * Known fixed with PHP 5.2.9 + libxml2-2.7.3
+ */
+class PhpXmlBugTester {
+       var $parsedData = '';
+       var $ok = false;
+       function __construct() {
+               $charData = '<b>c</b>';
+               $xml = '<a>' . htmlspecialchars( $charData ) . '</a>';
+               
+               $parser = xml_parser_create();
+               xml_set_character_data_handler( $parser, array( $this, 'chardata' ) );
+               $parsedOk = xml_parse($parser, $xml, true);
+               $this->ok = $parsedOk && ($this->parsedData == $charData);
+       }
+       function chardata($parser, $data) {
+               $this->parsedData .= $data;
+       }
+}
+
+/**
+ * Test for PHP bug #50394 (PHP 5.3.x conversion to null only, not 5.2.x)
+ */
+class PhpRefCallBugTester {
+       public $ok = false;
+
+       function __call( $name, $args ) {
+               $old = error_reporting( E_ALL & ~E_WARNING );
+               call_user_func_array( array( $this, 'checkForBrokenRef' ), $args );
+               error_reporting( $old );
+       }
+
+       function checkForBrokenRef( &$var ) {
+               if ( $var ) {
+                       $this->ok = true;
+               }
+       }
+
+       function execute() {
+               $var = true;
+               call_user_func_array( array( $this, 'foo' ), array( &$var ) );
+       }
+}
+
 function readconsole( $prompt = '' ) {
        static $isatty = null;
        if ( is_null( $isatty ) ) {
@@ -137,4 +210,4 @@ function mw_have_dl() {
                && is_callable( 'dl' )
                && wfIniGetBool( 'enable_dl' )
                && !wfIniGetBool( 'safe_mode' );
-}
\ No newline at end of file
+}