How to see if a post exists based on a meta value

Question

Is there any way to see if a post exists by a meta value?

For instance, lets say I want to see if another post has a unique meta value of "pictureID", and if so do something else.

Is there a way I could write that clause in php?

Thank you

Answer 1

if you dont know the post id then

you can use custom wordpress query to check post meta according to key like

global $wpdb;
$wpdb->get_results( "select * from $wpdb->postmeta where meta_key = 'pictureID' " );

And then you can get all results with post id and then get that post data.

Hope this helps ;)