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1. wdm
   Member
   Posted 2 years ago #

   When adding an array to the global query variables with the query_vars hook, it is always flattened to the string 'Array'.

   I remember seeing a ticket on trac about this, but now I can't seem to find it.

   Can anyone shed any light, is there a workaround?

   ["query_vars"]=>
     array(1) {
       ["multi-cat"]=>
       string(5) "Array"
    }

   Update: There's a ticket here that explains all values are cast as strings for security.

2. wdm
   Member
   Posted 2 years ago #

   Here is the code:

   function add_query_vars($query_vars) {
     $query_vars[] = 'multi-cat';
     return $query_vars;
   }

   With the url blog.com/?multi-cat[]=6&multi-cat[]=10

   (GET vars come from a multiple category widget I'm working on, the selects are each named 'multi-cat[]' to create an array of category IDs).

   function parse_query_vars($query) {
     var_dump($query);
   }

   The resulting var_dump shows the array is recognised, but cast to a string:

   ["query_vars"]=>
     array(1) {
       ["multi-cat"]=>
       string(5) "Array"
    }

3. wdm
   Member
   Posted 2 years ago #

   There is a kind-of workaround, by explicitly adding the query_vars from $_GET:

   function parse_query_vars($query) {
   
     if ( isset($_GET['multi-cat']) ) {
   
       $query->query_vars['multi-cat'] = $_GET['multi-cat'];
   
       var_dump($query);
   
     }
   
   }

   The var_dump now reports:

   ["query_vars"]=>
     array(1) {
       ["multi-cat"]=>
       array(2) {
         [0]=>
         string(1) "6"
         [1]=>
         string(2) "10"
       }
     }

   Unfortunately custom rewrite rules don't seem to work with this method.

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