The dialog HTML comes from WP_Editors::wp_link_dialog() but no hooks in there. We could instead use jQuery to append the custom HTML to the link dialog and try to override e.g. the wpLink.getAttrs(), because it’s very short 😉 Demo example: jQuery( document ).ready( function( $ ) { $(‘#link-options’).append( ‘<div> <label><span>Link Class</span> <select name=”wpse-link-class” id=”wpse_link_class”> <option value=”normal”>normal</option> … Read more
To expand on Mark’s answer, there’s not much (generally) available in the way of filters in the default WordPress widgets (except for perhaps widget_text). But adding your own custom widget is easy – put this in your functions.php: require_once(“my_widget.php”); add_action(“widgets_init”, “my_custom_widgets_init”); function my_custom_widgets_init(){ register_widget(“My_Custom_Widget_Class”); } Then you simply want to copy the existing categories widget … Read more
In my blocks.js , located in wp-includes/js/dist/ I find the RemoveInvalidHTML function, which seems to responsible for removing styles from pasted HTML. /** * Given a schema, unwraps or removes nodes, attributes and classes on HTML. * * @param {string} HTML The HTML to clean up. * @param {Object} schema Schema for the HTML. * … Read more
muplugins_loaded is the earliest hook. Depending on your wordpress setup, you may not have any plugins in the MU_PLUGINS directory. In that case this hook may not fire. The next best hook to trigger is plugins_loaded. RESOURCES WordPress Codex – Action Reference List Q/A: How to get WordPress’ hook run sequence? Q/A: Make sense of … Read more
Try to see the function with better names: apply_filters( $filter_name, // used for add_filter( $filter_name, ‘callback’ ); $value_to_change, // the only variable whose value you can change $context_1, // context $context_2 // more context ); So when that function is called as: // wp-login.php line 94 apply_filters( ‘login_body_class’, $classes, $action ); You can use … … Read more
Overview Basically the “Plugin API,” which summons Filters and Hooks, consists out of the following functions: apply_filters() – execute do_action – execute apply_filters_ref_array() – execute do_action_ref_array() – execute add_filter() – add to stack add_action() – add to stack Basic Internals Overall there’re a couple of globals (what else in WordPress world) involved: global $wp_filter, $wp_actions, … Read more
QUESTION AND ANSWER REVISITED There are sometimes these questions that nags you and hunts you down later in life again, and this is one such question. This question had me thinking about an alternative solution to the problem. As I already stated, custom fields and meta boxes are there to store small pieces of meta … Read more
It is easier to read: When is what called? If you are debugging a hook you can immediately see if you have to read the function or not: If it is not your hook, you can skip the code. In my themes and plugins I combine all registrations for actions, filters and shortcodes at the … Read more
As of WordPress 4.1 there is a filter: script_loader_tag. You can use it to find the correct script: add_filter( ‘script_loader_tag’, function ( $tag, $handle ) { if ( ‘contact-form-7’ !== $handle ) return $tag; return str_replace( ‘ src’, ‘ defer=”defer” src’, $tag ); }, 10, 2 ); Old answer There is no dedicated filter available … Read more
Just use the the_content filter, e.g.: <?php function theme_slug_filter_the_content( $content ) { $custom_content=”YOUR CONTENT GOES HERE”; $custom_content .= $content; return $custom_content; } add_filter( ‘the_content’, ‘theme_slug_filter_the_content’ ); ?> Basically, you append the post content after your custom content, then return the result. Edit As Franky @bueltge points out in his comment, the process is the same … Read more