[wp-hackers] Throw 404 error via plugin

[Cornelius, Gregory]

I have used a parse_query filter before to issue a 404 under certain conditions.

function foo_parse_query($query) {
    if(!is_admin() && foo_is_404()) {
        $query->set('pagename', '');
        $query->set_404();
        status_header( 404 );
        nocache_headers();
    }
    return $query;
}

add_filter('parse_query', 'foo_parse_query', 1000, 1);

On Jan 13, 2011, at 1:26 PM, Ryan Bilesky wrote:

ok that was wierd.  That sent the header but did not load the 404 error
document, but sending the header then including the 404 template worked,
even though I tried it before and it didn't.  I think when I tried that
originally I didn't use die(); after including the template but this works:

header("HTTP/1.1 404 Not Found");
include(TEMPLATEPATH . '/404.php');
die();

One side effect though, when it loads images for the error document, they
have a 404 status too even though they exist and load properly.  Any idea
how to fix that?

On Thu, Jan 13, 2011 at 9:51 AM, Ryan Bilesky <rbilesky at gmail.com<mailto:rbilesky at gmail.com>> wrote:

Ok I spoke too soon, this still is not working.

What I might do is this, create a file call it say 404error.php and it
would look like this

<?php

include ('./wp_load.php');
include (TEMPLATEPATH . '/404.php');

?>

Then set my .htaccess to use this 404error.php as my 404 error document
then just send the 404 header in my plugin via header();

Not the simplest option but that should work if nobody has any other ideas.

 On Thu, Jan 13, 2011 at 9:03 AM, Ryan Bilesky <rbilesky at gmail.com<mailto:rbilesky at gmail.com>>wrote:

Where would I redirect them?

I'll try the pre_get_posts hook given the explination I think that should
workl. Thanks all for your help.

On Jan 13, 2011 2:08 AM, "24/7" <24-7 at gmx.net<mailto:24-7 at gmx.net>> wrote:
Don't know if this is true, but here goes my theory: Ryan tries to
bring someone to a 404 page when some condition is not met. So why not
if { bla() } else { wp_redirect('wherever', 404) } ?
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