Probably this is one of my biggest headaches. I have a project to deliver and i was using wordpress for development and speed.
After almost enjoying the good sail the big issue struck.
When i send data through AJAX to a PHP file that i wrote, the PHP get the message but my AJAX somehow keeps getting 404 response and when i check my console, its clear PHP replied.
Ok i did alot of tweaks and nothing worked and decided to search google which went for hours.
Lucky me i found the solution and i believe its important to share it here.
This is a post response by Tim Stone (a big thanks man) and i am not editing it but putting it up word for word.
When you include
wp-blog-header.php, you end up bootstrapping the whole WordPress setup routine. The function
wp() is called, which calls
$wp->main(), which in turn calls various setup functions.
One of these is
$wp->query_posts(), which calls
$wp_the_query->query(), which in turn calls WPQuery's ``` parsequery()
function. I suspect that the 404 indication is generated in there (your AJAX page isn't a WP post, or anything like that), and is later transformed into an actual 404 response header by $wp->handle404()
, the function called afterqueryposts()``` in main().
I'm not 100% sure that parse_query() is the definite culprit, but I would suggest seeing if you can just include wp-load.php instead, since I believe it does the actual work of creating the objects that you want to access.
Again, I don't actually use WordPress, so I can't be sure, but looking at the source code this seems to be the most likely case, from what I can tell.