Using $_GET variables in the URL?

2 comments

1. 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'); 
   }
   

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2. 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' );
   }
   

   http://codex.wordpress.org/Function_Reference/add_query_arg

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