Pluggable functions are less elastic than filters/actions. You can have only one pluggable function “active” – so only one plugin can override the core function. And you don’t have much control over which plugin will it be (WP will use the pluggable function that gets defined first). So it won’t be very useful if all … Read more
I suggest to check out Get the Image plugin. Basically it is single function that acts as flexible and configurable wrapper to mine posts for images via different methods (post meta fields, featured images, attached images, images in post body).
You can use the show_option_all argument: <?php $args = array( ‘show_option_all’ => ‘Categories’ ); wp_dropdown_categories( $args ); ?> Function Reference/wp dropdown categories
If the rest of your function works you just need to add a call to wp_safe_redirect and hook the whole thing into WordPress. I think that the first hook that will have a populated $wp_query is wp. So alter the last part of your function… if($max_page < $paged){ wp_safe_redirect(get_bloginof(‘url’),’301′); } And then add the following … Read more
WordPress never makes any HTTP requests for gravatars, it just generates URLs to them. You don’t really need to override function completely. You can filter get_avatar hook and return different URL if email matches user with custom avatar set.
You can only override pluggable functions in a plugin, not via functions.php. The function is already defined when functions.php is loaded, which is why your overriding function is skipped. Move the code to your own plugin to enable it.
Remove the action: add_action(‘wp_footer’, ‘remove_upme_script’, 0 ); function remove_upme_script() { remove_action(‘wp_footer’, ‘upme_custom_scripts’); }
Wrap your function in if( ! function_exists( ‘wp_authenticate’ ) ) to get rid of the error and successfully activate your plugin: if( ! function_exists( ‘wp_authenticate’ ) ){ function wp_authenticate(){} } This is necessary because in the context of activating a plugin, the function does already exist, only after it is activated will your plugin load … Read more
I do not see you actually calling child_remove_parent_function() in your code. Another issue to be aware of is timing. It is counter–intuitive, but functions.php files are loaded in order of child first, parent second. Overall you need to ensure two things: code works at all it is called at the appropriate moment, after parent theme … Read more
Functions, which aren’t wrapped inside functions_exists() calls, are not meant to be pluggable. If you’re searching for extensions, then use filters or hooks – in case there’re some. As you can read in the phpDocBlock: Ensure that the welcome message is not empty. Currently unused. So this filter won’t work. I’m no MU expert, but … Read more