I'm posting some data to a PHP script via jQuery AJAX, and everything executes correctly, but it returns a 404 error. In my Firebug console the response from the PHP script is correct. I don't understand how the script can respond, and it is still throwing a 404 error. The jQuery "error" callback method triggers, and the "success" method doesn't.
All statements performed by the PHP script work accurately, because I can see the database being updated, etc.
I'm using jQuery 1.4.2, on a WordPress 3.x website hosted by Dreamhost.
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OK, I've figured out that when I include WordPress's wp-blog-header.php file in the Ajax script, I get the error. Also, once upon a time these scripts work, and I am 90% sure they stopped working after the WP 3.0 update. I'll paste in the Response headers from Firebug.
This header response from PHP that includes the wp-blog-header.php and returns a 404 error in Firebug...
Date Tue, 10 Aug 2010 01:44:44 GMT
Server Apache
X-Powered-By PHP/5.2.6
X-Pingback http://www.learnwake.com/xmlrpc.php
Expires Wed, 11 Jan 1984 05:00:00 GMT
Cache-Control no-cache, must-revalidate, max-age=0
Pragma no-cache
Last-Modified Tue, 10 Aug 2010 01:44:44 GMT
Vary Accept-Encoding
Content-Encoding gzip
Content-Length 36
Keep-Alive timeout=2, max=98
Connection Keep-Alive
Content-Type text/html; charset=UTF-8
This header response from PHP that doesn't include the wp-blog-header.php and returns a 200 OK in Firebug...
Date Tue, 10 Aug 2010 01:44:58 GMT
Server Apache
X-Powered-By PHP/5.2.6
Vary Accept-Encoding
Content-Encoding gzip
Content-Length 36
Keep-Alive timeout=2, max=100
Connection Keep-Alive
Content-Type text/html