functions - Read For Learn

How do I edit wp_head and/or functions.php to remove rss-feed which isnt used and dont validate?

If we look at the file /wp-includes/default-filters.php we can find these two lines in there add_action( ‘wp_head’, ‘feed_links’, 2 ); add_action( ‘wp_head’, ‘feed_links_extra’, 3 ); so if we want to remove these actions, we can do it with these two lines in functions.php: remove_action(‘wp_head’,’feed_links’,2); remove_action(‘wp_head’,’feed_links_extra’,3); So the feed links will be removed from the <head> … Read more

How would go about if I just want a temporary function?

Use e.g. the init hook instead. For instance;: if (isset($_GET[‘convert’])) add_action(‘init’, ‘yourfunction’); (Come up with a better check, though. ?convert could mean anything. And secure it by checking for user permissions, that it hasn’t already run, etc.)

Super simple shortcode not working

Your problem is here: $welcomePage = get_post( 5 ); echo $welcomePage -> post_content; Shortcodes are processed on display by via a filter on the_content which is called by the function the_content(). You’ve bypassed that functionality and are echoing the raw post data. You need to output your code using a proper Loop or explicitly process … Read more

Global functions on WPMU

What you are looking for is a “MU-Plugin”– “Must-Use Plugin”.. Originally these were called “Multi-User Plugins” and were intended for exactly your purpose– to provide a way for site admins to enable functionality on all sites of an installation. Create a directory at /wp-content/mu-plugins/ and put your PHP file(s) in it. WordPress will load the … Read more

How to mass-delete inline styles in WordPress custom post type automatically?

I would use the Search Regex plugin. It will allow you to use a regular expression to find and replace (in your case delete) inline styles. Make sure you backup your database before you begin! A simple regular expression that should work for you would be (style=”).*” It will look for a string starting with … Read more

is_user_logged_in not working to redirect only logged out users

You need to wrap the first three || conditions in additional parentheses so they are evaluated first BEFORE the last && condition: Psuedocode example: here here ↓ ↓ if ( (condition || condtion || condition) && ! condition ) { //do business logic… } This now means that: If any ONE of is_paged() OR is_author() … Read more

How to target only the front page (not subsequent paginated pages) in theme/plugin?

You have a misconception about is_front_page(). Lets look at the source: public function is_front_page() { // most likely case if ( ‘posts’ == get_option( ‘show_on_front’) && $this->is_home() ) return true; elseif ( ‘page’ == get_option( ‘show_on_front’) && get_option( ‘page_on_front’ ) && $this->is_page( get_option( ‘page_on_front’ ) ) ) return true; else return false; } So from … Read more

Pass Shortcode Attribute to footer Script

It’s simple. WordPress have a handy function to send variables to a registered script. It’s wp_localize_script. It work this way: //First Register Your Script wp_register_script( ‘name-of-script’, ‘http://example.com/script.js’, ”, ”, true ); //Then send dynamic variables wp_localize_script( ‘name-of-script’, ‘globalVar’, array( ‘id’ => ‘slideTarget’ ) ); //Finally invoke it on Front-End wp_enqueue_script ( ‘name-of-script’ ); This should … Read more

Programmatically Create Category and sub Category

If your question if like this: Category A – sub-category 1 – sub-category 2 – sub-category 3 Then you would create the following in your theme’s functions.php: //create the main category wp_insert_term( // the name of the category ‘Category A’, // the taxonomy, which in this case if category (don’t change) ‘category’, array( // what … Read more

Is it better to assign functions like get_the_id() to a variable if it’s used multiple times?

Yes, it is always better to keep the result of a function call in a private variable. But the reason is not performance. Reliability In your example, you are calling a function that internally accesses a global variable ($post). A global variable can be overwritten any time, so you might end up with two different … Read more

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