You have misspelled the action hook name. This: add_action( ‘after-setup_theme’, ‘ja_theme_setup’ ); Should be: add_action( ‘after_setup_theme’, ‘ja_theme_setup’ ); The full code: add_action( ‘after_setup_theme’, ‘ja_theme_setup’ ); function ja_theme_setup() { add_theme_support( ‘post-thumbnails’); }
The activated theme is stored in the options table: template is the parent theme, stylesheet is the child theme. If there is no child theme the two values will be the same. The current hostname (URL without protocol or path) is available in the $_SERVER variable. You can then hook into the stylesheet and template … Read more
WP already does this out of the box thanks to the include_children parameter of tax_query which is true by default. So you do not need to tell it the sub-terms, just do something like this: /wp/v2/posts?categories=1
To be honest, you should never use a PHP file as action attribute for a form in WordPress. WordPress already has API for this and you should use this instead. Why? Because it’s always better if your app/site has only one entry point (or as few as possible). And it’s always a bad idea to … Read more
You can’t put AJAX into the callback for a shortcode. It doesn’t make any sense to. If you’re making an AJAX request then you’re making it on the front-end and the shortcode has already rendered. So anything you do with the response to the AJAX request needs to occur on the front-end. So what you … Read more
WordPress Localization and Templating
Hook use is very, very simple. To create a hook use apply_filters or do_action. The first parameter is the hook name, the other parameters are the arguments. You must have the hook name, but the other arguments are optional. You can have, so far as I know, as many arguments as you like. For example: … Read more
Prerequisites First, all your callbacks (alias: runtime functions/methods) should be attached to predictable hooks. Example: add_action( ‘plugins_loaded’, ‘wpse_102852_bootstrap’ ); function wpse_102852_bootstrap() { // Time to attach the plugins callbacks add_action( ‘wp_loaded’, ‘some_callback’ ); } This callback is attached to the first hook that is available for plugins. Now other plugins know when your plugin is … Read more
As background, and to answer my own question (after some research), the <form> tag in an Options screen is usually generated with code similar to this: <form action=’options.php’ method=’post’> <?php settings_fields( ‘pluginPage’ ); // initializes all of the settings fields do_settings_sections( ‘pluginPage’ ); // does the settings section; into a table submit_button(); // creats the … Read more
The original function ends with this line: return apply_filters( ‘presscore_get_page_title’, $title ); That’s your cue. You can build a filter that completely overrules the $title generated by that function. Like this: add_filter (‘presscore_get_page_title’,’wpse263380_presscore_get_page_title’,10,1); function wpse263380_presscore_get_page_title ( $title ) { $title=”My awesome title”; return $title; }