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Commit daeb8c4a by Scott
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Coding style (feed)

parent ac597698
Showing with 300 additions and 309 deletions
qa-include/qa-feed.php
......@@ -20,409 +20,401 @@
More about this license: http://www.question2answer.org/license.php
*/
if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
header('Location: ../');
exit;
}
if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
header('Location: ../');
exit;
}
@ini_set('display_errors', 0); // we don't want to show PHP errors to RSS readers
qa_report_process_stage('init_feed');
require_once QA_INCLUDE_DIR . 'app/options.php';
// Functions used within this file
/**
* Database failure handler function for RSS feeds - outputs HTTP and text errors
*/
function qa_feed_db_fail_handler($type, $errno = null, $error = null, $query = null)
{
header('HTTP/1.1 500 Internal Server Error');
echo qa_lang_html('main/general_error');
qa_exit('error');
}
/**
* Common function called when a non-existent feed is requested - outputs HTTP and text errors
*/
function qa_feed_not_found()
{
header('HTTP/1.0 404 Not Found');
echo qa_lang_html('misc/feed_not_found');
qa_exit();
}
/**
* Common function to load appropriate set of questions for requested feed, check category exists, and set up page title
*/
function qa_feed_load_ifcategory($categoryslugs, $allkey, $catkey, &$title,
$questionselectspec1 = null, $questionselectspec2 = null, $questionselectspec3 = null, $questionselectspec4 = null)
{
$countslugs = @count($categoryslugs);
list($questions1, $questions2, $questions3, $questions4, $categories, $categoryid) = qa_db_select_with_pending(
$questionselectspec1,
$questionselectspec2,
$questionselectspec3,
$questionselectspec4,
$countslugs ? qa_db_category_nav_selectspec($categoryslugs, false) : null,
$countslugs ? qa_db_slugs_to_category_id_selectspec($categoryslugs) : null
);
if ($countslugs && !isset($categoryid))
qa_feed_not_found();
@ini_set('display_errors', 0); // we don't want to show PHP errors to RSS readers
if (isset($allkey))
$title = (isset($categoryid) && isset($catkey)) ? qa_lang_sub($catkey, $categories[$categoryid]['title']) : qa_lang($allkey);
qa_report_process_stage('init_feed');
return array_merge(
is_array($questions1) ? $questions1 : array(),
is_array($questions2) ? $questions2 : array(),
is_array($questions3) ? $questions3 : array(),
is_array($questions4) ? $questions4 : array()
);
}
require_once QA_INCLUDE_DIR.'app/options.php';
// Connect to database and get the type of feed and category requested (in some cases these are overridden later)
// Functions used within this file
qa_db_connect('qa_feed_db_fail_handler');
qa_preload_options();
function qa_feed_db_fail_handler($type, $errno=null, $error=null, $query=null)
/*
Database failure handler function for RSS feeds - outputs HTTP and text errors
*/
{
header('HTTP/1.1 500 Internal Server Error');
echo qa_lang_html('main/general_error');
qa_exit('error');
}
$requestlower = strtolower(qa_request());
$foursuffix = substr($requestlower, -4);
if ($foursuffix == '.rss' || $foursuffix == '.xml') {
$requestlower = substr($requestlower, 0, -4);
}
function qa_feed_not_found()
/*
Common function called when a non-existent feed is requested - outputs HTTP and text errors
*/
{
header('HTTP/1.0 404 Not Found');
echo qa_lang_html('misc/feed_not_found');
qa_exit();
}
$requestlowerparts = explode('/', $requestlower);
$feedtype = @$requestlowerparts[1];
$feedparams = array_slice($requestlowerparts, 2);
function qa_feed_load_ifcategory($categoryslugs, $allkey, $catkey, &$title,
$questionselectspec1=null, $questionselectspec2=null, $questionselectspec3=null, $questionselectspec4=null)
/*
Common function to load appropriate set of questions for requested feed, check category exists, and set up page title
*/
{
$countslugs=@count($categoryslugs);
list($questions1, $questions2, $questions3, $questions4, $categories, $categoryid)=qa_db_select_with_pending(
$questionselectspec1,
$questionselectspec2,
$questionselectspec3,
$questionselectspec4,
$countslugs ? qa_db_category_nav_selectspec($categoryslugs, false) : null,
$countslugs ? qa_db_slugs_to_category_id_selectspec($categoryslugs) : null
);
if ($countslugs && !isset($categoryid))
qa_feed_not_found();
// Choose which option needs to be checked to determine if this feed can be requested, and stop if no matches
if (isset($allkey))
$title=(isset($categoryid) && isset($catkey)) ? qa_lang_sub($catkey, $categories[$categoryid]['title']) : qa_lang($allkey);
$feedoption = null;
$categoryslugs = $feedparams;
return array_merge(
is_array($questions1) ? $questions1 : array(),
is_array($questions2) ? $questions2 : array(),
is_array($questions3) ? $questions3 : array(),
is_array($questions4) ? $questions4 : array()
);
}
switch ($feedtype) {
case 'questions':
$feedoption = 'feed_for_questions';
break;
case 'hot':
$feedoption = 'feed_for_hot';
if (!QA_ALLOW_UNINDEXED_QUERIES)
$categoryslugs = null;
break;
// Connect to database and get the type of feed and category requested (in some cases these are overridden later)
case 'unanswered':
$feedoption = 'feed_for_unanswered';
if (!QA_ALLOW_UNINDEXED_QUERIES)
$categoryslugs = null;
break;
qa_db_connect('qa_feed_db_fail_handler');
qa_preload_options();
case 'answers':
case 'comments':
case 'activity':
$feedoption = 'feed_for_activity';
break;
$requestlower=strtolower(qa_request());
$foursuffix=substr($requestlower, -4);
if ( ($foursuffix=='.rss') || ($foursuffix=='.xml') )
$requestlower=substr($requestlower, 0, -4);
$requestlowerparts=explode('/', $requestlower);
$feedtype=@$requestlowerparts[1];
$feedparams=array_slice($requestlowerparts, 2);
case 'qa':
$feedoption = 'feed_for_qa';
break;
case 'tag':
if (strlen(@$feedparams[0])) {
$feedoption = 'feed_for_tag_qs';
$categoryslugs = null;
}
break;
// Choose which option needs to be checked to determine if this feed can be requested, and stop if no matches
case 'search':
if (strlen(@$feedparams[0])) {
$feedoption = 'feed_for_search';
$categoryslugs = null;
}
break;
}
$feedoption=null;
$categoryslugs=$feedparams;
$countslugs = @count($categoryslugs);
switch ($feedtype) {
case 'questions':
$feedoption='feed_for_questions';
break;
if (!isset($feedoption))
qa_feed_not_found();
case 'hot':
$feedoption='feed_for_hot';
if (!QA_ALLOW_UNINDEXED_QUERIES)
$categoryslugs=null;
break;
case 'unanswered':
$feedoption='feed_for_unanswered';
if (!QA_ALLOW_UNINDEXED_QUERIES)
$categoryslugs=null;
break;
// Check that all the appropriate options are in place to allow this feed to be retrieved
case 'answers':
case 'comments':
case 'activity':
$feedoption='feed_for_activity';
break;
if (!(qa_opt($feedoption) && ($countslugs ? (qa_using_categories() && qa_opt('feed_per_category')) : true)))
qa_feed_not_found();
case 'qa':
$feedoption='feed_for_qa';
break;
case 'tag':
if (strlen(@$feedparams[0])) {
$feedoption='feed_for_tag_qs';
$categoryslugs=null;
}
break;
// Retrieve the appropriate questions and other information for this feed
case 'search':
if (strlen(@$feedparams[0])) {
$feedoption='feed_for_search';
$categoryslugs=null;
}
break;
}
require_once QA_INCLUDE_DIR . 'db/selects.php';
$countslugs=@count($categoryslugs);
$sitetitle = qa_opt('site_title');
$siteurl = qa_opt('site_url');
$full = qa_opt('feed_full_text');
$count = qa_opt('feed_number_items');
$showurllinks = qa_opt('show_url_links');
if (!isset($feedoption))
qa_feed_not_found();
$linkrequest = $feedtype . ($countslugs ? ('/' . implode('/', $categoryslugs)) : '');
$linkparams = null;
switch ($feedtype) {
case 'questions':
$questions = qa_feed_load_ifcategory($categoryslugs, 'main/recent_qs_title', 'main/recent_qs_in_x', $title,
qa_db_qs_selectspec(null, 'created', 0, $categoryslugs, null, false, $full, $count)
);
break;
// Check that all the appropriate options are in place to allow this feed to be retrieved
if (!(
(qa_opt($feedoption)) &&
($countslugs ? (qa_using_categories() && qa_opt('feed_per_category')) : true)
))
qa_feed_not_found();
case 'hot':
$questions = qa_feed_load_ifcategory($categoryslugs, 'main/hot_qs_title', 'main/hot_qs_in_x', $title,
qa_db_qs_selectspec(null, 'hotness', 0, $categoryslugs, null, false, $full, $count)
);
break;
case 'unanswered':
$questions = qa_feed_load_ifcategory($categoryslugs, 'main/unanswered_qs_title', 'main/unanswered_qs_in_x', $title,
qa_db_unanswered_qs_selectspec(null, null, 0, $categoryslugs, false, $full, $count)
);
break;
// Retrieve the appropriate questions and other information for this feed
case 'answers':
$questions = qa_feed_load_ifcategory($categoryslugs, 'main/recent_as_title', 'main/recent_as_in_x', $title,
qa_db_recent_a_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count)
);
break;
require_once QA_INCLUDE_DIR.'db/selects.php';
case 'comments':
$questions = qa_feed_load_ifcategory($categoryslugs, 'main/recent_cs_title', 'main/recent_cs_in_x', $title,
qa_db_recent_c_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count)
);
break;
$sitetitle=qa_opt('site_title');
$siteurl=qa_opt('site_url');
$full=qa_opt('feed_full_text');
$count=qa_opt('feed_number_items');
$showurllinks=qa_opt('show_url_links');
case 'qa':
$questions = qa_feed_load_ifcategory($categoryslugs, 'main/recent_qs_as_title', 'main/recent_qs_as_in_x', $title,
qa_db_qs_selectspec(null, 'created', 0, $categoryslugs, null, false, $full, $count),
qa_db_recent_a_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count)
);
break;
case 'activity':
$questions = qa_feed_load_ifcategory($categoryslugs, 'main/recent_activity_title', 'main/recent_activity_in_x', $title,
qa_db_qs_selectspec(null, 'created', 0, $categoryslugs, null, false, $full, $count),
qa_db_recent_a_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count),
qa_db_recent_c_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count),
qa_db_recent_edit_qs_selectspec(null, 0, $categoryslugs, null, true, $full, $count)
);
break;
$linkrequest=$feedtype.($countslugs ? ('/'.implode('/', $categoryslugs)) : '');
$linkparams=null;
case 'tag':
$tag = $feedparams[0];
switch ($feedtype) {
case 'questions':
$questions=qa_feed_load_ifcategory($categoryslugs, 'main/recent_qs_title', 'main/recent_qs_in_x', $title,
qa_db_qs_selectspec(null, 'created', 0, $categoryslugs, null, false, $full, $count)
);
break;
$questions = qa_feed_load_ifcategory(null, null, null, $title,
qa_db_tag_recent_qs_selectspec(null, $tag, 0, $full, $count)
);
case 'hot':
$questions=qa_feed_load_ifcategory($categoryslugs, 'main/hot_qs_title', 'main/hot_qs_in_x', $title,
qa_db_qs_selectspec(null, 'hotness', 0, $categoryslugs, null, false, $full, $count)
);
break;
$title = qa_lang_sub('main/questions_tagged_x', $tag);
$linkrequest = 'tag/' . $tag;
break;
case 'unanswered':
$questions=qa_feed_load_ifcategory($categoryslugs, 'main/unanswered_qs_title', 'main/unanswered_qs_in_x', $title,
qa_db_unanswered_qs_selectspec(null, null, 0, $categoryslugs, false, $full, $count)
);
break;
case 'search':
require_once QA_INCLUDE_DIR . 'app/search.php';
case 'answers':
$questions=qa_feed_load_ifcategory($categoryslugs, 'main/recent_as_title', 'main/recent_as_in_x', $title,
qa_db_recent_a_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count)
);
break;
$query = $feedparams[0];
case 'comments':
$questions=qa_feed_load_ifcategory($categoryslugs, 'main/recent_cs_title', 'main/recent_cs_in_x', $title,
qa_db_recent_c_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count)
);
break;
$results = qa_get_search_results($query, 0, $count, null, true, $full);
case 'qa':
$questions=qa_feed_load_ifcategory($categoryslugs, 'main/recent_qs_as_title', 'main/recent_qs_as_in_x', $title,
qa_db_qs_selectspec(null, 'created', 0, $categoryslugs, null, false, $full, $count),
qa_db_recent_a_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count)
);
break;
case 'activity':
$questions=qa_feed_load_ifcategory($categoryslugs, 'main/recent_activity_title', 'main/recent_activity_in_x', $title,
qa_db_qs_selectspec(null, 'created', 0, $categoryslugs, null, false, $full, $count),
qa_db_recent_a_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count),
qa_db_recent_c_qs_selectspec(null, 0, $categoryslugs, null, false, $full, $count),
qa_db_recent_edit_qs_selectspec(null, 0, $categoryslugs, null, true, $full, $count)
);
break;
$title = qa_lang_sub('main/results_for_x', $query);
$linkrequest = 'search';
$linkparams = array('q' => $query);
case 'tag':
$tag=$feedparams[0];
$questions = array();
$questions=qa_feed_load_ifcategory(null, null, null, $title,
qa_db_tag_recent_qs_selectspec(null, $tag, 0, $full, $count)
foreach ($results as $result) {
$setarray = array(
'title' => $result['title'],
'url' => $result['url'],
);
$title=qa_lang_sub('main/questions_tagged_x', $tag);
$linkrequest='tag/'.$tag;
break;
case 'search':
require_once QA_INCLUDE_DIR.'app/search.php';
$query=$feedparams[0];
$results=qa_get_search_results($query, 0, $count, null, true, $full);
$title=qa_lang_sub('main/results_for_x', $query);
$linkrequest='search';
$linkparams=array('q' => $query);
$questions=array();
foreach ($results as $result) {
$setarray=array(
'title' => $result['title'],
'url' => $result['url'],
);
if (isset($result['question']))
$questions[]=array_merge($result['question'], $setarray);
elseif (isset($result['url']))
$questions[]=$setarray;
}
break;
}
// Remove duplicate questions (perhaps referenced in an answer and a comment) and cut down to size
if (isset($result['question']))
$questions[] = array_merge($result['question'], $setarray);
elseif (isset($result['url']))
$questions[] = $setarray;
}
break;
}
require_once QA_INCLUDE_DIR.'app/format.php';
require_once QA_INCLUDE_DIR.'app/updates.php';
require_once QA_INCLUDE_DIR.'util/string.php';
if ( ($feedtype!='search') && ($feedtype!='hot') ) // leave search results and hot questions sorted by relevance
$questions=qa_any_sort_and_dedupe($questions);
// Remove duplicate questions (perhaps referenced in an answer and a comment) and cut down to size
$questions=array_slice($questions, 0, $count);
$blockwordspreg=qa_get_block_words_preg();
require_once QA_INCLUDE_DIR . 'app/format.php';
require_once QA_INCLUDE_DIR . 'app/updates.php';
require_once QA_INCLUDE_DIR . 'util/string.php';
if ($feedtype != 'search' && $feedtype != 'hot') // leave search results and hot questions sorted by relevance
$questions = qa_any_sort_and_dedupe($questions);
// Prepare the XML output
$questions = array_slice($questions, 0, $count);
$blockwordspreg = qa_get_block_words_preg();
$lines=array();
$lines[]='<?xml version="1.0" encoding="utf-8"?>';
$lines[]='<rss version="2.0">';
$lines[]='<channel>';
// Prepare the XML output
$lines[]='<title>'.qa_xml($sitetitle.' - '.$title).'</title>';
$lines[]='<link>'.qa_xml(qa_path($linkrequest, $linkparams, $siteurl)).'</link>';
$lines[]='<description>Powered by Question2Answer</description>';
$lines = array();
foreach ($questions as $question) {
$lines[] = '<?xml version="1.0" encoding="utf-8"?>';
$lines[] = '<rss version="2.0">';
$lines[] = '<channel>';
// Determine whether this is a question, answer or comment, and act accordingly
$lines[] = '<title>' . qa_xml($sitetitle . ' - ' . $title) . '</title>';
$lines[] = '<link>' . qa_xml(qa_path($linkrequest, $linkparams, $siteurl)) . '</link>';
$lines[] = '<description>Powered by Question2Answer</description>';
$options=array('blockwordspreg' => @$blockwordspreg, 'showurllinks' => $showurllinks);
foreach ($questions as $question) {
$time=null;
$htmlcontent=null;
// Determine whether this is a question, answer or comment, and act accordingly
if (isset($question['opostid'])) {
$time=$question['otime'];
$options = array('blockwordspreg' => @$blockwordspreg, 'showurllinks' => $showurllinks);
if ($full)
$htmlcontent=qa_viewer_html($question['ocontent'], $question['oformat'], $options);
$time = null;
$htmlcontent = null;
} elseif (isset($question['postid'])) {
$time=$question['created'];
if (isset($question['opostid'])) {
$time = $question['otime'];
if ($full)
$htmlcontent=qa_viewer_html($question['content'], $question['format'], $options);
}
if ($full)
$htmlcontent = qa_viewer_html($question['ocontent'], $question['oformat'], $options);
if ($feedtype=='search') {
$titleprefix='';
$urlxml=qa_xml($question['url']);
} elseif (isset($question['postid'])) {
$time = $question['created'];
} else {
switch (@$question['obasetype'].'-'.@$question['oupdatetype']) {
case 'Q-':
case '-':
$langstring=null;
break;
if ($full)
$htmlcontent = qa_viewer_html($question['content'], $question['format'], $options);
}
case 'Q-'.QA_UPDATE_VISIBLE:
$langstring=$question['hidden'] ? 'misc/feed_hidden_prefix' : 'misc/feed_reshown_prefix';
break;
if ($feedtype == 'search') {
$titleprefix = '';
$urlxml = qa_xml($question['url']);
case 'Q-'.QA_UPDATE_CLOSED:
$langstring=isset($question['closedbyid']) ? 'misc/feed_closed_prefix' : 'misc/feed_reopened_prefix';
break;
} else {
switch (@$question['obasetype'] . '-' . @$question['oupdatetype']) {
case 'Q-':
case '-':
$langstring = null;
break;
case 'Q-'.QA_UPDATE_TAGS:
$langstring='misc/feed_retagged_prefix';
break;
case 'Q-' . QA_UPDATE_VISIBLE:
$langstring = $question['hidden'] ? 'misc/feed_hidden_prefix' : 'misc/feed_reshown_prefix';
break;
case 'Q-'.QA_UPDATE_CATEGORY:
$langstring='misc/feed_recategorized_prefix';
break;
case 'Q-' . QA_UPDATE_CLOSED:
$langstring = isset($question['closedbyid']) ? 'misc/feed_closed_prefix' : 'misc/feed_reopened_prefix';
break;
case 'A-':
$langstring='misc/feed_a_prefix';
break;
case 'Q-' . QA_UPDATE_TAGS:
$langstring = 'misc/feed_retagged_prefix';
break;
case 'A-'.QA_UPDATE_SELECTED:
$langstring='misc/feed_a_selected_prefix';
break;
case 'Q-' . QA_UPDATE_CATEGORY:
$langstring = 'misc/feed_recategorized_prefix';
break;
case 'A-'.QA_UPDATE_VISIBLE:
$langstring=$question['ohidden'] ? 'misc/feed_hidden_prefix' : 'misc/feed_a_reshown_prefix';
break;
case 'A-':
$langstring = 'misc/feed_a_prefix';
break;
case 'A-'.QA_UPDATE_CONTENT:
$langstring='misc/feed_a_edited_prefix';
break;
case 'A-' . QA_UPDATE_SELECTED:
$langstring = 'misc/feed_a_selected_prefix';
break;
case 'C-':
$langstring='misc/feed_c_prefix';
break;
case 'A-' . QA_UPDATE_VISIBLE:
$langstring = $question['ohidden'] ? 'misc/feed_hidden_prefix' : 'misc/feed_a_reshown_prefix';
break;
case 'C-'.QA_UPDATE_TYPE:
$langstring='misc/feed_c_moved_prefix';
break;
case 'A-' . QA_UPDATE_CONTENT:
$langstring = 'misc/feed_a_edited_prefix';
break;
case 'C-'.QA_UPDATE_VISIBLE:
$langstring=$question['ohidden'] ? 'misc/feed_hidden_prefix' : 'misc/feed_c_reshown_prefix';
break;
case 'C-':
$langstring = 'misc/feed_c_prefix';
break;
case 'C-'.QA_UPDATE_CONTENT:
$langstring='misc/feed_c_edited_prefix';
break;
case 'C-' . QA_UPDATE_TYPE:
$langstring = 'misc/feed_c_moved_prefix';
break;
case 'Q-'.QA_UPDATE_CONTENT:
default:
$langstring='misc/feed_edited_prefix';
break;
case 'C-' . QA_UPDATE_VISIBLE:
$langstring = $question['ohidden'] ? 'misc/feed_hidden_prefix' : 'misc/feed_c_reshown_prefix';
break;
}
case 'C-' . QA_UPDATE_CONTENT:
$langstring = 'misc/feed_c_edited_prefix';
break;
$titleprefix=isset($langstring) ? qa_lang($langstring) : '';
case 'Q-' . QA_UPDATE_CONTENT:
default:
$langstring = 'misc/feed_edited_prefix';
break;
$urlxml=qa_xml(qa_q_path($question['postid'], $question['title'], true, @$question['obasetype'], @$question['opostid']));
}
if (isset($blockwordspreg))
$question['title']=qa_block_words_replace($question['title'], $blockwordspreg);
$titleprefix = isset($langstring) ? qa_lang($langstring) : '';
// Build the inner XML structure for each item
$urlxml = qa_xml(qa_q_path($question['postid'], $question['title'], true, @$question['obasetype'], @$question['opostid']));
}
$lines[]='<item>';
$lines[]='<title>'.qa_xml($titleprefix.$question['title']).'</title>';
$lines[]='<link>'.$urlxml.'</link>';
if (isset($blockwordspreg))
$question['title'] = qa_block_words_replace($question['title'], $blockwordspreg);
if (isset($htmlcontent))
$lines[]='<description>'.qa_xml($htmlcontent).'</description>';
// Build the inner XML structure for each item
if (isset($question['categoryname']))
$lines[]='<category>'.qa_xml($question['categoryname']).'</category>';
$lines[] = '<item>';
$lines[] = '<title>' . qa_xml($titleprefix . $question['title']) . '</title>';
$lines[] = '<link>' . $urlxml . '</link>';
$lines[]='<guid isPermaLink="true">'.$urlxml.'</guid>';
if (isset($htmlcontent))
$lines[] = '<description>' . qa_xml($htmlcontent) . '</description>';
if (isset($time))
$lines[]='<pubDate>'.qa_xml(gmdate('r', $time)).'</pubDate>';
if (isset($question['categoryname']))
$lines[] = '<category>' . qa_xml($question['categoryname']) . '</category>';
$lines[]='</item>';
}
$lines[] = '<guid isPermaLink="true">' . $urlxml . '</guid>';
$lines[]='</channel>';
$lines[]='</rss>';
if (isset($time))
$lines[] = '<pubDate>' . qa_xml(gmdate('r', $time)) . '</pubDate>';
$lines[] = '</item>';
}
// Disconnect here, once all output is ready to go
$lines[] = '</channel>';
$lines[] = '</rss>';
qa_db_disconnect();
// Disconnect here, once all output is ready to go
// Output the XML - and we're done!
qa_db_disconnect();
header('Content-type: text/xml; charset=utf-8');
echo implode("\n", $lines);
// Output the XML - and we're done!
/*
Omit PHP closing tag to help avoid accidental output
*/
\ No newline at end of file
header('Content-type: text/xml; charset=utf-8');
echo implode("\n", $lines);
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