Get attachment ID by file path in WordPress

Question

I know the path of the file and I like to get the attachment ID.

There's a function wp_get_attachment_url() which requires the ID to get the URL but I need it reverse (with path not URL though)

Answer 1

UPDATE: since wp 4.0.0 there's a new function that could do the job. I didn't tested it yet, but it's this:

https://developer.wordpress.org/reference/functions/attachment_url_to_postid/

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OLD ANSWER: so far, the best solution I've found out there, is the following:

https://frankiejarrett.com/2013/05/get-an-attachment-id-by-url-in-wordpress/

I think It's the best for 2 reasons:

• It does some integrity checks
• [important!] it's domain-agnostic. This makes for safe site moving. To me, this is a key feature.