In Wordpress I'm trying to build a function, which will append photo credits (including a link to the source) to images being inserted into the post (filter image_send_to_editor). The problem is, some photos may be plain, some may be wrapped in a link tag, others might have a caption and a link too.
So I'm trying to build a preg_replace using REGEX to look for <img> or <a><img></a>, so I can append my credits. I can look for all images, but then my credits with links would be placed in the image link, which is nested links -> illegal.
This is my regex so far
(<img([^>]*)><\/a>|<img([^>]*)>)
Which means my <span class="photo-creds"><a href="http://source.com">Source</a></span> should be appended after plain image tag or after the closing link tag if the image has one.
This is a testing text, where all of the images should have photo credits appended:
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