This product for vBulletin 3.8 adds support for saving and editing an Open Graph image meta tag for each thread. Four file edits in includes/functions.php are required to be able to use the data for the meta tag in the headinclude template.
Included are also instructions to use the preview text of the first post of the thread for an Open Graph description meta tag and an improved meta description tag since vBulletin uses a poorly constructed meta description tag by only using the thread title and current page number.
First upload product-ogimagethreadfield.xml in the Products & Plugins section.
Find near line 1272:
$threadcache["$threadid"] = $vbulletin->db->query_first("
SELECT IF(visible = 2, 1, 0) AS isdeleted,Replace with:
$threadcache["$threadid"] = $vbulletin->db->query_first("
SELECT IF(thread.visible = 2, 1, 0) AS isdeleted,Find near line 1278:
. iif($vbulletin->options['threadvoted'] AND $vbulletin->userinfo['userid'], 'threadrate.vote,')
. iif($marking, 'threadread.readtime AS threadread, forumread.readtime AS forumread,') . "Replace with:
. iif($vbulletin->options['threadvoted'] AND $vbulletin->userinfo['userid'], 'threadrate.vote,')
. iif($marking, 'threadread.readtime AS threadread, forumread.readtime AS forumread,')
. iif($vbulletin->options['threadpreview'] > 0 AND THIS_SCRIPT == 'showthread', 'post.pagetext AS preview, ') . "Find near line 1293:
$tachyjoin
$hook_query_joins
WHERE thread.threadid = $threadidReplace with:
" . iif($vbulletin->options['threadpreview'] > 0 AND THIS_SCRIPT == 'showthread', "LEFT JOIN " . TABLE_PREFIX . "post AS post ON(post.postid = thread.firstpostid)") . "
$tachyjoin
$hook_query_joins
WHERE thread.threadid = $threadidFind near line 1307:
$thread = $threadcache["$threadid"];
if ($thread['prefixid'])
{Replace with:
if($vbulletin->options['threadpreview'] > 0 AND THIS_SCRIPT == 'showthread')
{
$threadcache["$threadid"]['preview'] = strip_quotes($threadcache["$threadid"]['preview']);
$threadcache["$threadid"]['preview'] = htmlspecialchars_uni(
fetch_censored_text(
fetch_trimmed_title(
strip_bbcode($threadcache["$threadid"]['preview'], false, true),
$vbulletin->options['threadpreview'])
)
);
}
$thread = $threadcache["$threadid"];
if ($thread['prefixid'])
{Go to the headinclude template in any of your styles.
Use the following code to add the Open Graph image meta tag to thread pages.
<if condition="$show['threadinfo'] AND !empty($threadinfo[img])">
<meta property="og:image" content="$threadinfo[img]">
</if>Use the following code to add an Open Graph description meta tag to thread pages.
<if condition="$show['threadinfo']">
<meta property="og:description" content="$threadinfo[preview]">
</if>Use the following code to use thread specific data in the meta description tag
<if condition="$show['threadinfo']">
<meta name="description" content="$threadinfo[preview]<if condition="$pagenumber > 1"> (<phrase 1="$pagenumber">$vbphrase[page_x]</phrase>)</if>">
</if>If done properly, your thread pages will produce HTML metadata like this:
<!doctype html>
<html prefix="og: http://ogp.me/ns#">
<head>
<meta charset="utf-8">
<meta name="description" content="Lorem ipsum dolor sit amet, consectetur adipiscing elit">
<meta property="og:description" content="Lorem ipsum dolor sit amet, consectetur adipiscing elit">
<meta property="og:image" content="https://www.myvbulletinforum.com/attachment.php?attachmentid=1">
...