Wordpress & PHP to check if custom field exists, and if not replace with a random string -


I am trying to create a function that checks the existence of post_thumbnail () It sets up the background image of a post and an element in Wordpress Here's what I've tried here:

It currently crashes / I have been confused about when and where to use quotation marks while using PHP in HTML markup!

Any ideas how can I do this?

Words do bloginfo; 

  & lt ;? Php if (has_post_thumbnail)) {The_post_thumbnail ( 'full');} else {echo get_bloginfo ( 'stylesheet directory "). '/assets/img/article-overlay-1.jpg';}? & Gt;

Cheers!


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