two active templates for one post

Question

I wanna have

• example.com/post-name -> uses template1.php

• example.com/post-name/details -> uses template2.php

I found this discussion, so I implemented the codes in my theme’s functions.php. I also made the changes from the older replies but I get this error

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'detail_rewrite_rules' not found or invalid function name in /public_html/wp-includes/plugin.php on line 173

I didn’t edit plugin.php and on line 173 is:

$value = call_user_func_array($the_['function'], array_slice($args, 1, (int) $the_['accepted_args']));

I hope someone can help me, it seems a fairly easy job but I might be wrong.

Answer 1

If you look at the function you'll see there's an error :

function detail_rewrite_rule( $rules ) {
  $newrules = array();
  $newrules['(.+?)/([^/]+)(/[0-9]+)?/detail/?$'] = 'index.php?category_name=$matches[1]&name=$matches[2]&page=$matches[3]&detail=1'; 

  return $newrules + $rules;
}
add_filter( 'rewrite_rules_array','detail_rewrite_rules' );

The callback is not the same : detail_rewrite_rule, detail_rewrite_rules.

In the add_filter you have to provide the same name for function. Otherwise this won't be hooked in WordPress. So you can fix it with :

add_filter( 'rewrite_rules_array','detail_rewrite_rule' );//without the s