I need to generate a simple error message on a page by passing a variable through the URL.
The URL is structured as follows:
http://site.com/parent-category/category/?error=pause
I'm sure it's the permalinks rewrite interfering, but I'm not sure how to resolve it.
Try adding the variable to the WordPress' array of 'recognised query variables'...
add_filter('query_vars', 'my_register_query_vars' );
function my_register_query_vars( $qvars ){
//Add query variable to $qvars array
$qvars[] = 'my_error';
return $qvars;
}
Then the value of 'my_error' can be found via get_query_var('my_error'). (See Codex)
EDIT
From Otto's comment, it's better to do:
add_action('init','add_my_error');
function add_my_error() {
global $wp;
$wp->add_query_var('my_error');
}
add_rewrite_tag($tagname,$regex). Any difference?
This was the only way I could get this to work
add_action('init','add_query_args');
function add_query_args()
{
add_query_arg( 'error', 'pause' );
}
