PHP rebuildnolinktag函数代码示例

//.........这里部分代码省略.........
    if (!isset($options['filter'])) {
        $options['filter'] = true;
    }
    if (!isset($options['para'])) {
        $options['para'] = true;
    }
    if (!isset($options['newlines'])) {
        $options['newlines'] = true;
    }
    if (!isset($options['overflowdiv'])) {
        $options['overflowdiv'] = false;
    }
    // Calculate best context.
    if (empty($CFG->version) or $CFG->version < 2013051400 or during_initial_install()) {
        // Do not filter anything during installation or before upgrade completes.
        $context = null;
    } else {
        if (isset($options['context'])) {
            // First by explicit passed context option.
            if (is_object($options['context'])) {
                $context = $options['context'];
            } else {
                $context = context::instance_by_id($options['context']);
            }
        } else {
            if ($courseiddonotuse) {
                // Legacy courseid.
                $context = context_course::instance($courseiddonotuse);
            } else {
                // Fallback to $PAGE->context this may be problematic in CLI and other non-standard pages :-(.
                $context = $PAGE->context;
            }
        }
    }
    if (!$context) {
        // Either install/upgrade or something has gone really wrong because context does not exist (yet?).
        $options['nocache'] = true;
        $options['filter'] = false;
    }
    if ($options['filter']) {
        $filtermanager = filter_manager::instance();
        $filtermanager->setup_page_for_filters($PAGE, $context);
        // Setup global stuff filters may have.
    } else {
        $filtermanager = new null_filter_manager();
    }
    switch ($format) {
        case FORMAT_HTML:
            if (!$options['noclean']) {
                $text = clean_text($text, FORMAT_HTML, $options);
            }
            $text = $filtermanager->filter_text($text, $context, array('originalformat' => FORMAT_HTML, 'noclean' => $options['noclean']));
            break;
        case FORMAT_PLAIN:
            $text = s($text);
            // Cleans dangerous JS.
            $text = rebuildnolinktag($text);
            $text = str_replace('  ', '&nbsp; ', $text);
            $text = nl2br($text);
            break;
        case FORMAT_WIKI:
            // This format is deprecated.
            $text = '<p>NOTICE: Wiki-like formatting has been removed from Moodle.  You should not be seeing
                     this message as all texts should have been converted to Markdown format instead.
                     Please post a bug report to http://moodle.org/bugs with information about where you
                     saw this message.</p>' . s($text);
            break;
        case FORMAT_MARKDOWN:
            $text = markdown_to_html($text);
            if (!$options['noclean']) {
                $text = clean_text($text, FORMAT_HTML, $options);
            }
            $text = $filtermanager->filter_text($text, $context, array('originalformat' => FORMAT_MARKDOWN, 'noclean' => $options['noclean']));
            break;
        default:
            // FORMAT_MOODLE or anything else.
            $text = text_to_html($text, null, $options['para'], $options['newlines']);
            if (!$options['noclean']) {
                $text = clean_text($text, FORMAT_HTML, $options);
            }
            $text = $filtermanager->filter_text($text, $context, array('originalformat' => $format, 'noclean' => $options['noclean']));
            break;
    }
    if ($options['filter']) {
        // At this point there should not be any draftfile links any more,
        // this happens when developers forget to post process the text.
        // The only potential problem is that somebody might try to format
        // the text before storing into database which would be itself big bug..
        $text = str_replace("\"{$CFG->httpswwwroot}/draftfile.php", "\"{$CFG->httpswwwroot}/brokenfile.php#", $text);
        if ($CFG->debugdeveloper) {
            if (strpos($text, '@@PLUGINFILE@@/') !== false) {
                debugging('Before calling format_text(), the content must be processed with file_rewrite_pluginfile_urls()', DEBUG_DEVELOPER);
            }
        }
    }
    if (!empty($options['overflowdiv'])) {
        $text = html_writer::tag('div', $text, array('class' => 'no-overflow'));
    }
    return $text;
}

//.........这里部分代码省略.........
    if (!empty($CFG->cachetext) and empty($options['nocache'])) {
        $hashstr = $text . '-' . $filtermanager->text_filtering_hash($context) . '-' . $context->id . '-' . current_language() . '-' . (int) $format . (int) $options['trusted'] . (int) $options['noclean'] . (int) $options['para'] . (int) $options['newlines'];
        $time = time() - $CFG->cachetext;
        $md5key = md5($hashstr);
        if (CLI_SCRIPT) {
            if (isset($croncache[$md5key])) {
                return $croncache[$md5key];
            }
        }
        if ($oldcacheitem = $DB->get_record('cache_text', array('md5key' => $md5key), '*', IGNORE_MULTIPLE)) {
            if ($oldcacheitem->timemodified >= $time) {
                if (CLI_SCRIPT) {
                    if (count($croncache) > 150) {
                        reset($croncache);
                        $key = key($croncache);
                        unset($croncache[$key]);
                    }
                    $croncache[$md5key] = $oldcacheitem->formattedtext;
                }
                return $oldcacheitem->formattedtext;
            }
        }
    }
    switch ($format) {
        case FORMAT_HTML:
            if (!$options['noclean']) {
                $text = clean_text($text, FORMAT_HTML, $options);
            }
            $text = $filtermanager->filter_text($text, $context, array('originalformat' => FORMAT_HTML, 'noclean' => $options['noclean']));
            break;
        case FORMAT_PLAIN:
            $text = s($text);
            // cleans dangerous JS
            $text = rebuildnolinktag($text);
            $text = str_replace('  ', '  ', $text);
            $text = nl2br($text);
            break;
        case FORMAT_WIKI:
            // this format is deprecated
            $text = '<p>NOTICE: Wiki-like formatting has been removed from Moodle.  You should not be seeing
                     this message as all texts should have been converted to Markdown format instead.
                     Please post a bug report to http://moodle.org/bugs with information about where you
                     saw this message.</p>' . s($text);
            break;
        case FORMAT_MARKDOWN:
            $text = markdown_to_html($text);
            if (!$options['noclean']) {
                $text = clean_text($text, FORMAT_HTML, $options);
            }
            $text = $filtermanager->filter_text($text, $context, array('originalformat' => FORMAT_MARKDOWN, 'noclean' => $options['noclean']));
            break;
        default:
            // FORMAT_MOODLE or anything else
            $text = text_to_html($text, null, $options['para'], $options['newlines']);
            if (!$options['noclean']) {
                $text = clean_text($text, FORMAT_HTML, $options);
            }
            $text = $filtermanager->filter_text($text, $context, array('originalformat' => $format, 'noclean' => $options['noclean']));
            break;
    }
    if ($options['filter']) {
        // at this point there should not be any draftfile links any more,
        // this happens when developers forget to post process the text.
        // The only potential problem is that somebody might try to format
        // the text before storing into database which would be itself big bug.
        $text = str_replace("\"{$CFG->httpswwwroot}/draftfile.php", "\"{$CFG->httpswwwroot}/brokenfile.php#", $text);

//.........这里部分代码省略.........
        $md5key = md5($hashstr);
        if (CLI_SCRIPT) {
            if (isset($croncache[$md5key])) {
                return $croncache[$md5key];
            }
        }
        if ($oldcacheitem = $DB->get_record('cache_text', array('md5key' => $md5key), '*', true)) {
            if ($oldcacheitem->timemodified >= $time) {
                if (CLI_SCRIPT) {
                    if (count($croncache) > 150) {
                        reset($croncache);
                        $key = key($croncache);
                        unset($croncache[$key]);
                    }
                    $croncache[$md5key] = $oldcacheitem->formattedtext;
                }
                return $oldcacheitem->formattedtext;
            }
        }
    }
    switch ($format) {
        case FORMAT_HTML:
            if ($options->smiley) {
                replace_smilies($text);
            }
            if (!$options->noclean) {
                $text = clean_text($text, FORMAT_HTML);
            }
            $text = $filtermanager->filter_text($text, $context, $courseid);
            break;
        case FORMAT_PLAIN:
            $text = s($text);
            // cleans dangerous JS
            $text = rebuildnolinktag($text);
            $text = str_replace('  ', '  ', $text);
            $text = nl2br($text);
            break;
        case FORMAT_WIKI:
            // this format is deprecated
            $text = '<p>NOTICE: Wiki-like formatting has been removed from Moodle.  You should not be seeing
                     this message as all texts should have been converted to Markdown format instead.
                     Please post a bug report to http://moodle.org/bugs with information about where you
                     saw this message.</p>' . s($text);
            break;
        case FORMAT_MARKDOWN:
            $text = markdown_to_html($text);
            if ($options->smiley) {
                replace_smilies($text);
            }
            if (!$options->noclean) {
                $text = clean_text($text, FORMAT_HTML);
            }
            $text = $filtermanager->filter_text($text, $context, $courseid);
            break;
        default:
            // FORMAT_MOODLE or anything else
            $text = text_to_html($text, $options->smiley, $options->para, $options->newlines);
            if (!$options->noclean) {
                $text = clean_text($text, FORMAT_HTML);
            }
            $text = $filtermanager->filter_text($text, $context, $courseid);
            break;
    }
    // Warn people that we have removed this old mechanism, just in case they
    // were stupid enough to rely on it.
    if (isset($CFG->currenttextiscacheable)) {

//.........这里部分代码省略.........
    } else {
        // Fallback to $PAGE->context this may be problematic in CLI and other non-standard pages :-(.
        $context = $PAGE->context;
    }

    if (!$context) {
        // Either install/upgrade or something has gone really wrong because context does not exist (yet?).
        $options['nocache'] = true;
        $options['filter']  = false;
    }

    if ($options['filter']) {
        $filtermanager = filter_manager::instance();
        $filtermanager->setup_page_for_filters($PAGE, $context); // Setup global stuff filters may have.
        $filteroptions = array(
            'originalformat' => $format,
            'noclean' => $options['noclean'],
        );
    } else {
        $filtermanager = new null_filter_manager();
        $filteroptions = array();
    }

    switch ($format) {
        case FORMAT_HTML:
            if (!$options['noclean']) {
                $text = clean_text($text, FORMAT_HTML, $options);
            }
            $text = $filtermanager->filter_text($text, $context, $filteroptions);
            break;

        case FORMAT_PLAIN:
            $text = s($text); // Cleans dangerous JS.
            $text = rebuildnolinktag($text);
            $text = str_replace('  ', '  ', $text);
            $text = nl2br($text);
            break;

        case FORMAT_WIKI:
            // This format is deprecated.
            $text = '<p>NOTICE: Wiki-like formatting has been removed from Moodle.  You should not be seeing
                     this message as all texts should have been converted to Markdown format instead.
                     Please post a bug report to http://moodle.org/bugs with information about where you
                     saw this message.</p>'.s($text);
            break;

        case FORMAT_MARKDOWN:
            $text = markdown_to_html($text);
            if (!$options['noclean']) {
                $text = clean_text($text, FORMAT_HTML, $options);
            }
            $text = $filtermanager->filter_text($text, $context, $filteroptions);
            break;

        default:  // FORMAT_MOODLE or anything else.
            $text = text_to_html($text, null, $options['para'], $options['newlines']);
            if (!$options['noclean']) {
                $text = clean_text($text, FORMAT_HTML, $options);
            }
            $text = $filtermanager->filter_text($text, $context, $filteroptions);
            break;
    }
    if ($options['filter']) {
        // At this point there should not be any draftfile links any more,
        // this happens when developers forget to post process the text.
        // The only potential problem is that somebody might try to format

//.........这里部分代码省略.........
            $text = trusttext_strip($text);
            if (!empty($CFG->enabletrusttext)) {
                $options->noclean = true;
            } else {
                $options->noclean = false;
            }
        } else {
            $options->noclean = false;
        }
    } else {
        if (!debugging('', DEBUG_DEVELOPER)) {
            // strip any forgotten trusttext in non-developer mode
            // do not forget to disable text cache when debugging trusttext!!
            $text = trusttext_strip($text);
        }
    }
    $CFG->currenttextiscacheable = true;
    // Default status - can be changed by any filter
    switch ($format) {
        case FORMAT_HTML:
            if ($options->smiley) {
                replace_smilies($text);
            }
            if (!$options->noclean) {
                $text = clean_text($text, FORMAT_HTML);
            }
            if ($options->filter) {
                $text = filter_text($text, $courseid);
            }
            break;
        case FORMAT_PLAIN:
            $text = s($text);
            // cleans dangerous JS
            $text = rebuildnolinktag($text);
            $text = str_replace('  ', '  ', $text);
            $text = nl2br($text);
            break;
        case FORMAT_WIKI:
            // this format is deprecated
            $text = '<p>NOTICE: Wiki-like formatting has been removed from Moodle.  You should not be seeing
                     this message as all texts should have been converted to Markdown format instead.
                     Please post a bug report to http://moodle.org/bugs with information about where you
                     saw this message.</p>' . s($text);
            break;
        case FORMAT_MARKDOWN:
            $text = markdown_to_html($text);
            if ($options->smiley) {
                replace_smilies($text);
            }
            if (!$options->noclean) {
                $text = clean_text($text, FORMAT_HTML);
            }
            if ($options->filter) {
                $text = filter_text($text, $courseid);
            }
            break;
        default:
            // FORMAT_MOODLE or anything else
            $text = text_to_html($text, $options->smiley, $options->para, $options->newlines);
            if (!$options->noclean) {
                $text = clean_text($text, FORMAT_HTML);
            }
            if ($options->filter) {
                $text = filter_text($text, $courseid);
            }
            break;

function format_text($text, $format = FORMAT_MOODLE, $options = NULL, $courseid = NULL)
{
    global $CFG, $course;
    if (!isset($options->noclean)) {
        $options->noclean = false;
    }
    if (!isset($options->smiley)) {
        $options->smiley = true;
    }
    if (!isset($options->filter)) {
        $options->filter = true;
    }
    if (!isset($options->para)) {
        $options->para = true;
    }
    if (!isset($options->newlines)) {
        $options->newlines = true;
    }
    if (empty($courseid)) {
        if (!empty($course->id)) {
            // An ugly hack for better compatibility
            $courseid = $course->id;
        }
    }
    /*
    if (!empty($CFG->cachetext)) {
        $time = time() - $CFG->cachetext;
        $md5key = md5($text.'-'.$courseid.$options->noclean.$options->smiley.$options->filter.$options->para.$options->newlines);
        if ($cacheitem = get_record_select('cache_text', "md5key = '$md5key' AND timemodified > '$time'")) {
            return $cacheitem->formattedtext;
        }
    }
    */
    // DISABLED - there is no cache_text - Penny
    $CFG->currenttextiscacheable = true;
    // Default status - can be changed by any filter
    switch ($format) {
        case FORMAT_HTML:
            if (!empty($options->smiley)) {
                replace_smilies($text);
            }
            if (!isset($options->noclean)) {
                $text = clean_text($text, $format, !empty($options->cleanuserfile));
            }
            if (!empty($options->filter)) {
                $text = filter_text($text, $courseid);
            }
            break;
        case FORMAT_PLAIN:
            $text = s($text);
            $text = rebuildnolinktag($text);
            $text = str_replace('  ', '  ', $text);
            $text = nl2br($text);
            break;
        case FORMAT_WIKI:
            // this format is deprecated
            $text = '<p>NOTICE: Wiki-like formatting has been removed from Moodle.  You should not be seeing
                     this message as all texts should have been converted to Markdown format instead.
                     Please post a bug report to http://moodle.org/bugs with information about where you
                     saw this message.</p>' . s($text);
            break;
        case FORMAT_MARKDOWN:
            $text = markdown_to_html($text);
            if (!empty($options->smiley)) {
                replace_smilies($text);
            }
            if (empty($options->noclean)) {
                $text = clean_text($text, $format);
            }
            if (!empty($options->filter)) {
                $text = filter_text($text, $courseid);
            }
            break;
        default:
            // FORMAT_MOODLE or anything else
            $text = text_to_html($text, $options->smiley, $options->para, $options->newlines);
            if (empty($options->noclean)) {
                $text = clean_text($text, $format);
            }
            if (!empty($options->filter)) {
                $text = filter_text($text, $courseid);
            }
            break;
    }
    if (!empty($CFG->cachetext) and $CFG->currenttextiscacheable) {
        $newrecord->md5key = $md5key;
        $newrecord->formattedtext = $text;
        $newrecord->timemodified = time();
        @insert_record('cache_text', $newrecord);
    }
    return $text;
}

 if ($forum->type != 'single') {
     $fullsubject .= " -> <a href=\"discuss.php?d={$discussion->id}\">" . format_string($discussion->name, true) . "</a>";
     if ($post->parent != 0) {
         $fullsubject .= " -> <a href=\"discuss.php?d={$post->discussion}&amp;parent={$post->id}\">" . format_string($post->subject, true) . "</a>";
     }
 }
 $post->subject = $fullsubject;
 //Indicate search terms only found in HTML markup
 //Use highlight() with nonsense tags to spot search terms in the
 //actual text content first.          fiedorow - 9/2/2005
 $missing_terms = "";
 // Hack for posts of format FORMAT_PLAIN. Otherwise html tags added by
 // the highlight() call bellow get stripped out by forum_print_post().
 if ($post->format == FORMAT_PLAIN) {
     $post->message = stripslashes_safe($post->message);
     $post->message = rebuildnolinktag($post->message);
     $post->message = str_replace(' ', '&nbsp; ', $post->message);
     $post->message = nl2br($post->message);
     $post->format = FORMAT_HTML;
 }
 $options = new object();
 $options->trusttext = true;
 // detect TRUSTTEXT marker before first call to format_text
 if (trusttext_present($post->message)) {
     $ttpresent = true;
 } else {
     $ttpresent = false;
 }
 $message = highlight($strippedsearch, format_text($post->message, $post->format, $options, $course->id), 0, '<fgw9sdpq4>', '</fgw9sdpq4>');
 foreach ($searchterms as $searchterm) {
     if (preg_match("/{$searchterm}/i", $message) && !preg_match('/<fgw9sdpq4>' . $searchterm . '<\\/fgw9sdpq4>/i', $message)) {