How to get the first image from a blog post for the Open Graph Metatag

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45 Posts

BrigitteB Reply #1, 11 years, 9 months ago

I want the og:image metatag be populated automatically by the url of the first image in the *content of each page.

This is the code from Mike Nuttall http://onsitenow.co.uk/modx/how-to-get-the-first-image-from-a-blog-post-for-the-open-graph-protocol-html-head-tags/

<?php
$content = $modx->resource->content;
if(preg_match("/src=\"(.*?)\"/",$content,&$matches)){
    $img  = substr($matches[1],1,strlen($matches[1]));  
}    
else {
    $img  = "assets/images/defaultImage.png";      
}
return $img;

But when I try it on my site I get PHP parse error. My PHP knowledge is very basic, I looked up the preg_match http://php.net/manual/de/function.preg-match.php, but am not sure about it.

Last error message was "Fatal error: Call-time pass-by-reference has been removed".

Can anyone help?

This question has been answered by sottwell. See the first response.

Brigitte Bornemann - Accessibility Consultant, Web Designer - Hamburg / Munich, Germany.
http://www.bit-informationsdesign.de

discuss.answer

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24,524 Posts

sottwell Reply #2, 11 years, 9 months ago

Get rid of the & in &$matches.

Studying MODX in the desert - http://sottwell.com
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45 Posts

BrigitteB Reply #3, 11 years, 9 months ago

Thank you, Susan. This community is so quick

Brigitte Bornemann - Accessibility Consultant, Web Designer - Hamburg / Munich, Germany.
http://www.bit-informationsdesign.de

Answered How to get the first image from a blog post for the Open Graph Metatag