I am try to get for my joomla 2.5 website the feature of facebook "preview link". This feature should generate a preview when I enter a link in my article (just like facebook does in the status field). I only need this features for link to text/images not to video.
I found this link but I am having difficulties to understand how I am suppose to implementing it into a joomla website.
Thanks a lot for your help!
To dictate what is used for a Facebook link in your content, you need to make use of the Facebook OpenGraph meta tags.
Take a look at this section of the Facebook Developers site, mainly Section 3: Use proper Open Graph tags.
Link Here
The three you need for what you're after are:
<meta property="og:title" content="MyContentTitle" />
<meta property="og:description" content="Enter your snippet here." />
<meta property="og:image" content="http://myurl.com/images/logo-100x100.jpg " />
You can either statically set these for your website, or manipulate the template files for your articles, and echo out the article titles/images/snippets using PHP.
//EDIT//
After clarification from the comments, the easiest method would be to add tooltips using jQuery/jQuery UI:
jQuery UI Tooltips
You can make the tooltips as large as you like, so you could add a preview of the article that is leads to.
Of course, you'll have to make changes to your site template to add this, and also include jQuery UI/jQuery to your template header, if it's not there already.
In addition to that, you'll need to use PHP to echo the article title, description and image within the tooltip.
I've been working on a Joomla site with custom template, and I've had to create some custom share buttons for Google+, email, Twitter & Facebook. The first three work fine, but the Facebook one is causing problems. I'm using K2 and have got all the Open Graph meta tags within the header - having added the site_name & fb:app_id tags manually as K2 adds all the others, but not these. However, if I try to share a blog post Facebook doesn't pick up anything other than the URL.
I've tested with the Facebook debugger and all the meta information is being scraped. I know that it can take a while for the sharer to pick up any changes, and thanks to the debugger I discovered that I had to switch off gzip in order for the correct page to be loaded and the tags scraped. I made that change on Friday lunchtime, and have just checked the site again today and there is no change, the sharer is still coming back with empty data except for the URL.
I'm using this link (the URL is generated automatically by the site):
Share on Facebook
and the following Open Graph tags:
<meta property="og:url" content="http://www.mydomain.co.uk/blog/category/page-title">
<meta property="og:title" content="Page Title - My Domain">
<meta property="og:type" content="article">
<meta property="og:image" content="http://www.mydomain.co.uk/media/k2/items/cache/9b2c4b44fb86522964124ed80d03c5e8_M.jpg">
<meta name="image" content="http://www.mydomain.co.uk/media/k2/items/cache/9b2c4b44fb86522964124ed80d03c5e8_M.jpg">
<meta property="og:description" content="Page Intro Text">
Can anyone please suggest what I've missed or got wrong?
Thanks!
The URL you are using in sharer link is
http://www.mydomain.co.uk:80/blog/category/page-title
and the URL at og:url is
http://www.mydomain.co.uk/blog/category/page-title
i.e. there is a difference in both URLs (:80 in the URL at sharer link), so it may cause issue.
Try to use same URL both place. May it helps.
The Linkedin documentation can be found here
As it says, it needs:
og:title
og:description
og:image
og:url
Here is an example of my wordpress blog source code that for simplicity I use Jetpack plug-in:
<!-- Jetpack Open Graph Tags -->
<meta property="og:type" content="article" />
<meta property="og:title" content="Starbucks Netherlands Intel" />
<meta property="og:url" content="http://lorentzos.com/starbucks-netherlands-intel/" />
<meta property="og:description" content="Today I had some free time at work. I wanted to play more with Foursquare APIs. So the question: "What is the correlation of the Starbucks Chain in the Netherlands?". Methodology: I found all the p..." />
<meta property="og:site_name" content="Dionysis Lorentzos" />
<meta property="og:image" content="http://lorentzos.com/wp-content/uploads/2013/08/starbucks-intel-nl-238x300.png" />
In Facebook it works great, or you can see the meta data here. However LinkedIn is more stubborn and doesn't really parse the data even the If you're unable to set Open Graph tags within the page that's being shared, LinkedIn will attempt to fetch the content automatically by determining the title, description, thumbnail image, etc.
I know that I don't have the og:image:width tag but Linkedin doesn't even parse title, description or url. Any ideas to debug it?
I checked again my html and found some warnings/errors in metadata. I fixed them and all work good. So the solution if you encounter the same problem:
Check your html again and debug it. Even if the page load well in your browser, the LinkedIn parser is not as powerful in terms of small errors. This tool might help.
My very first suggestion is appending a meaningless query to the URL, so that LinkedIn thinks it's a new link (this doesn't affect anything else) i.e.:
http://example.com/link.php?42 or http://example.com/link.html?refid=LinkedIn
If that doesn't suit your needs, a more drastic measure is in order.
After making sure you don't have any errors in your console and validating your site using:
http://validator.w3.org/...
Add the prefix attribute to every tag (not to html tag), then re-sign in with your LinkedIn account to clear the cache...
prefix="go: http://ogp.me/ns#" i.e.:
<meta prefix="og: http://ogp.me/ns#" property="og:title" content="Title of Page" />
<meta prefix="og: http://ogp.me/ns#" property="og:type" content="article" />
<meta prefix="og: http://ogp.me/ns#" property="og:image" content="http://example.com/image.jpg" />
<meta prefix="og: http://ogp.me/ns#" property="og:url" content="http://example.com/" />
I hope one of these three solutions works for someone. Cheers!
If you're sure you've done everything right (using open graph meta tags, no errors on validator.w3.org) and it still is not working, be sure to try it with a different page, it might be a LinkedIn cache thing.
I had a <h1>Project information</h1> on my page, which LinkedIn used as the title for sharing the page, instead of the <title> or <meta property="og:title" [...]/> tag. Even though I did everything right. But when I completely removed this <h1>Project information</h1> from the page source, it kept using 'Project information' as the title even thought it wasn't on the page anymore.
After trying a different page, it worked.
I stumbled about the same problem for our Wordpress site. The problem is created by conflicting OGP and oembed headers in standard wordpress + yoast / jetpack seo plugin.
You need to disabled the oembed headers with this plugin (this has no side effects): https://wordpress.org/plugins/disable-embeds/
After that you can force a fresh link preview by appending a ?1 as some of you guys already pointed out!
I hope that fixes your problem.
I wrote a detailed explanation for the problem here: https://pmig.at/2017/10/26/linkedin-link-preview-for-wordpress/
Linkedin caches the urls so it's very practical to make sure that this is not your problem before starting to debug.
This might tool then might come in handy: https://www.linkedin.com/post-inspector/inspect/
Here you can preview your url and see how it looks like when sharing. It refreshes the caching as well so you can be sure if you have a problem or if it was the caching only.
After a long trial and error I found out that my .htaccess was somehow blocking the Linkedin robot (wordpress site). For those who use the ithemes security plugin for wordpress or another security plugin make sure that LinkedIn is not blocked.
Make sure there is no line like:
RewriteCond %{HTTP_USER_AGENT} ^Link [NC,OR]
The easiest way to check is to use wordpress default htaccess lines.
As mentioned before, make sure you don't retry cached pages in linkedin.
You can try this only once a week!
I had a link to my site and I wanted to customize the image Linkedin displayed. So I added open graph tags which didn't seem to render at all. Until I read this:
The first time that LinkedIn's crawlers visit a webpage when asked to share content via a URL, the data it finds (Open Graph values or our own analysis) will be cached for a period of approximately 7 days.
This means that if you subsequently change the article's description, upload a new image, fix a typo in the title, etc., you will not see the change represented during any subsequent attempts to share the page until the cache has expired and the crawler is forced to revisit the page to retrieve fresh content.
https://developer.linkedin.com/docs/share-on-linkedin
The solution for me was to add a hashbang. I am on an ajax style application which doesn't render the whole page, I think linkedin has a bit of a hissy fit about the text/image not being on the page on initial scrape, adding
%23!
to the end of my encoded url or
#!
to the unencoded url before sending it off to linkedin seemed to do the trick nicely for my share button popup. Not wsure if this is only Ajax/js apps or not but it certainly solved a couple of hours of effort for me.
I guess this is only useful if your application is setup to handle the escape_fragment in the url and render a static page not a dynamic one but I can't test this theory right now
This was happening on one of my client's sites as well. I discovered that the .htaccess file was blocking the site from LinkedIn if the user-agents contained the string "jakarta".
As soon as I remove this filtering, LinkedIn was able to access all of the required the OpenGraph (og) information when the client would post a link.
True, the documentation states that you can have: title, url, description, and image. But in reality, you have two options. Pick one of the two following sets and use it, as you have no other choice...
Set 1 Options
og:title
og:url
og:image
Set 2 Options
og:title
og:url
og:description
That is the reason why og:description is mysteriously missing from preview links. But if you drop image, then your description will finally display.
Try it: Wikipedia has an og description but no og image, while GitHub has both. Share Wikipedia and Share GitHub. Clearly seems like either you get a choice to display description or a choice to display image. I have spent weeks struggling with LinkedIn Support to correct this, but to no avail.
I'm developing a social app that requires some Open Graph actions.
I want the meta data tag for the title to be from my database because the name of my action title depends on the user choice.
Is it possible to get the title meta from database, rather than being hard coded? For instance:
<meta property="og:title" content="<?php echo $someTitle ?>" />
Of course it is possible – but how to you want to know what content to put out when?
When Facebook scrapes your URL, your site’s user is not involved. So that means you have to transfer some info via the query string or something; and that would make them different URLs, so you’ll end up with different OG objects as well.
I want to try figure out how to get the title and all meta tags from a webpage
<title>A common title</title>
<meta name="keywords" content="Keywords blabla" />
<meta name="description" content="This is the description" />
This question seem to be asked and answered several times on stackoverflow but no answer cares about the language/charset of the webpage. For example, the script of shamittomar here Getting title and meta tags from external website only works for webpage in utf-8. This script fails to work, for ex it will return weird result for these sites:
http://www.tudou.com/
http://svmpbt.com/
(note: above websites are not mine but just examples)
Is there any way to do it in the right way, is there any available class to do this? Because Facebook Linter works correctly with above sites, I think there is available solution in PHP script.
Thanks.
You should use "get_meta_tags" function of php, it provides title, desscription and keyword. for it, refer this link : http://php.net/manual/en/function.get-meta-tags.php
And if you need more information, then you can use "file_get_contents" method also, that will return you source of that url, then parse it and extract the relevant information. Refer this link : http://in2.php.net/manual/en/function.file-get-contents.php