WordPress MU

(FYI this is wordpress mu 2.8.2 - I forgot to select the version number when I was posting this)

Hello all,

I'm developing a plugin which makes use of the wp_redirect function. You can see the relevant code here:

However, when I try to run that code I get this error.

Cannot modify header information - headers already sent by (output started at /path/to.site/wp-includes/query.php:390) in /path/to/site/wp-content/plugins/post_shock/postshock_core.php on line 53

Now, I checked query.php and nothing on line 390 seems to be creating any whitespace or sending any header info at all, so I suspect the problem might be deeper. Any ideas or thoughts would be appreciated!

And what is on line 53 of postshock_core.php?

You've got a blank line after a closing ?> somewhere

I swore I fixed all those but I'll go through with a fine toothed comb and report back.

Yeah, even if i remove all the code except my action hook and the redirect it still gives me that warning and breaks the code. I even removed my closing php tag and everything. My plugin has no whitespace now.. so something has got to be going on in the core :p

So what happens if you remove your hook and the redirect?

I got it running now with no warnings, but it still doesn't redirect for some reason - and its not calling any errors! Here's the code in question:

add_action('init', 'search_egg_redirect', 0);

function search_egg_redirect() {
	global $wpdb;
	$query = $wpdb->prepare($_GET['s']);

	if(!empty($query)) {
		$term_row = $wpdb->get_row('SELECT term,page_id FROM pshock_searcheggs WHERE TERM="' . $query . '" LIMIT 1');
		if($term_row->term) {
			wp_redirect('http://google.com');
		}
	}
}

Don't use wp_redirect in plugin.

Instead workaround:

// wp_redirect('http://google.com');
$location = "http://google.com";
echo "<meta http-equiv='refresh' content='0;url=$location' />";

http://core.trac.wordpress.org/ticket/2860
http://wordpress.org/support/topic/179091