1

I want to remove tag, category classes from Post Titles of my WordPress blog. On the frontend, Wordpress generates extra classes for every single article title.

For Example, this article, has these article title classes "category-tips-guides" "tag-indian-army" as displayed in the following image:

enter image description here

I have tried the following snippet to remove some extra classes (shared on this page) and it works:

function lsmwp_remove_postclasses($classes, $class, $post_id) {
$classes = array_diff( $classes, array(
    'hentry',
    'type-' . get_post_type($post_id),
    'status-' . get_post_status($post_id),
) );
return $classes;
add_filter('post_class', 'lsmwp_remove_postclasses', 10, 3);

But the issue with this code is that it doesn't remove any Tag, Category classes as I want.

Some References to post_class:

  1. https://codex.wordpress.org/Function_Reference/post_class
  2. https://core.trac.wordpress.org/browser/tags/4.9.7/src/wp-includes/post-template.php#L0
  • Is jQuery an option? – Mario Werner Jul 7 '18 at 12:29
  • No sir, No jQuery, please. Currently, my blog doesn't make use of jQuery. So, I don't want to use jQuery just for this single purpose. Hope you understand :) – Narender Chopra Jul 7 '18 at 12:46
  • jQuery is a part of WordPress core. So even if you don't use it, WordPress already uses it anyway. You should be more specific in your question. It would help if you edit your question and add some HTML examples where these classes appear and what exactly you want to remove. – Mario Werner Jul 7 '18 at 13:59
  • Actually, I want to remove these classes from the Post Title, generated at the front end where I don't have any jQuery. Question Updated with more specific details. Thanks :) – Narender Chopra Jul 7 '18 at 14:01
  • Just for info: WordPress also utilizes jQuery in the frontend. – Mario Werner Jul 7 '18 at 14:38
0

Try this.

// **** Remove unwanted classes
function remove_classes($classes, $class, $post_id)
{
    // Array that holds the undesired classes
    $removeClasses = array(
        'category-',
        'tag-'
    );

    // Array to store the new class names
    $newClasses = array();
    foreach ($classes as $_class)
    {
        // Iterate through the array of undesired classes and
        // check if the current $_class name starts with the
        // undesired class name
        $hasClass = FALSE;
        foreach ($removeClasses as $_removeClass)
        {
            if (strpos($_class, $_removeClass) === 0)
            {
                $hasClass = TRUE;
                break;
            }
        }

        // If $_class does not contain an undesired class name,
        // add it to the array of new class names.
        if (!$hasClass)
        {
            $newClasses[] = $_class;
        }
    }

    // Return the array of new class names
    return ($newClasses);
}
add_filter('post_class', 'remove_classes', 10, 3);

This filter declares an array of undesired class names ($removeClasses). Expand it with the class names you don't want to have.

Then, the function iterates through the passed array of classes ($classes) and checks if it contains classes you have defined in the $removeClasses array. If not, it will add it to a new array ($newClasses). If yes, it will skip it.

Finally it returns the new array $newClasses.

Basically it sorts out the classes you don't want. And instead of manipulating the passed $classes array, it creates a new one with only the good classes and returns that instead.

I haven't tested it though. I don't have a WordPress installation available here right now to fiddle around with. It could be that it doesn't work, because post_class might not be the right filter.

  • Thanks, Mate but this snippet is causing fatal error resulting in the whole site down. – Narender Chopra Jul 7 '18 at 15:05
  • @NarenderChopra I just tested the code and it works fine. Please see phpfiddle.org/lite/code/2qrp-ane1 - Please enable error reporting in your code: error_reporting(E_ALL); ini_set('display_errors', 1); – Mario Werner Jul 7 '18 at 15:27
  • @NarenderChopra I updated the code. I think it might be caused because I forgot the add the $priority and $accepted_args parameters to the add_filter function. Try add_filter('post_class', 'remove_classes', 10, 3); instead. – Mario Werner Jul 7 '18 at 15:31
  • Thanks a ton, Mate. It finally worked. The perfect solution for my need :) – Narender Chopra Jul 8 '18 at 4:03
0

Obviously you will also have to remove all elements from $classes that begin with tag- and category-. The difficult is that other than with type- and status- there may be multiple instance of them.

So, you will have to loop through the array and remove any instances that start with these strings:

foreach ($classes as $class) {
  if (substr ($class, 0, 4) === "tag-") $class = '';
  if (substr ($class, 0, 8) === "category-") $class = '';
  }
  • Thanks for the quick answer. Actually, I am looking for a code that I can add to my theme's functions.php to remove these extra classes. I don't want to edit core Wordpress files :) – Narender Chopra Jul 7 '18 at 12:28
  • This is not jquery but php. You simply add it to the filter you already have. – cjbj Jul 7 '18 at 12:37
  • I am currently using the following function. May you please let me know where to add the strings provided by you: ` function lsmwp_remove_postclasses($classes, $class, $post_id) { $classes = array_diff( $classes, array( 'hentry', 'type-' . get_post_type($post_id), 'status-' . get_post_status($post_id), ) ); return $classes; add_filter('post_class', 'lsmwp_remove_postclasses', 10, 3); ` – Narender Chopra Jul 7 '18 at 12:47
  • Insert it before return $classes; – cjbj Jul 7 '18 at 12:50
  • But if you have no idea what your filter actually does it might help to learn a little bit more about php. – cjbj Jul 7 '18 at 12:51

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