My web pages start with something like this:
[% PROCESS header.inc
Title = "Shelterbelt Production"
Desc = "Walk through on the economics of producing large numbers of medium
size trees for use in shelterbelt plantings."
FBimage="$base/Images/AdPix/Trade_Show/2013-06-27_20-32-32.jpg"
%]
Note the FBimage variable.
In Header.inc
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";>
<html xmlns="http://www.w3.org/1999/xhtml"; xml:lang="en" lang="en">
[% USE String %]
[% USE MultiMarkdown %]
[% pathchunks = template.name.split('/') ;
chunks = pathchunks.max
pathchunks.$chunks = pathchunks.last.replace('.tt2','.html');
CurWebPage = '/' _ template.name.replace('.tt2','.html');
CurWebLink = base _ CurWebPage
%]
<head>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8" />
<meta content="text/html; charset=UTF-8" http-equiv="content-type" />
$ExtraMetaContent
<title>$Title</title>
<base href="$base" />
<meta name="description" content="$Desc" />
<meta property="og:site_name" content="Tree Farm for Sale"/>
<meta property="og:type" content="article"/>
<meta property="og:image" content="$FBimage"/>
<meta property="og:title" content="$Title"/>
<meta property="og:url" content="$CurWebLink "/>
<link rel="shortcut icon" href="/favicon.ico"
type="image/vnd.microsoft.icon" />
<link type="text/css" href="/2col.css" rel="stylesheet" />
<link rel="canonical" href=$CurWebLink />
<meta name="viewport" content="width=device-width, initial-scale=1" />
Ok.
The problem occurs with the open graph FBimage tag. If I don't define it
in my header later then facebook uses no image at all when shared.
Otherwise it will default to the first image on the page.
How do I modify Header.inc so that it doesn't put in the line
<meta property="og:image" content="$FBimage"/>
if FBimage isn't defined in the calling template?
Regards
Sherwood
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