Get URL of a specific file
See Determining Plugin and Content Directories. plugins_url( ‘filename’, __FILE__ ); … returns the full URI to the file in your plugin. For themes you use: get_stylesheet_directory_uri() . ‘/path/to/file’;
themes
Hide a theme on list of themes in wp-admin without editing core files
The following filter works in Multisite in the following screens: /wp-admin/network/themes.php /wp-admin/network/site-themes.php?id=1 (individual sites allowed themes) add_filter( ‘all_themes’, ‘wpse_55081_remove_themes_ms’ ); function wpse_55081_remove_themes_ms($themes) { unset($themes[‘Twenty Ten’], $themes[‘Twenty Eleven’]); return $themes; } For the regular theme selector in a single site or sub-site of a network /wp-admin/themes.php (Appearance -> Themes), looks like there’s no hook… Manipulate list … Read more
add image size still doesn’t work even after regenerating thumbnails
There are a couple of things to check here. First, make sure that add_theme_support( ‘post-thumbnails’ ) is loaded before add_image_size( ‘small-thumb’, 60, 60, true ) You can always hook everything through a function to the after_setup_theme hook. I always add these in my theme setup function function wpse_setup_theme() { add_theme_support( ‘post-thumbnails’ ); add_image_size( ‘small-thumb’, 60, … Read more
How to remove “Proudly powered by WordPress” in Twenty Sixteen (2016) theme?
The quick and dirty way would be to either delete the two lines that are ‘resposible’ for the message, or wrap them by comments / comment-them-out. In your theme folder ‘twentysixteen’ look for the theme file ‘footer.php’ Around line 50 look for the following two lines: <span class=”site-title”><a href=”https://wordpress.stackexchange.com/questions/230348/<?php echo esc_url( home_url(“https://wordpress.stackexchange.com/” ) ); ?>” … Read more
Building useful features into your theme
It’s all site-dependent. I have a few core things I build in to any theme’s functions.php though: Change logo on admin page to suit the client’s company Hide WP-Stats smiley graphic Hide WP.me short URLs and replace with their chosen provider Add option for Twitter, Facebook, and Buzz buttons and ability to pull in Tweets … Read more
Detection of theme being used
If you only need the current theme name, you can use get_current_theme().
What can I hook into after_setup_theme?
Think of WordPress execution as a series of rungs on a ladder: WordPress climbs one rung, then the next, then the next, and so on. Think of action hooks as the rungs themselves. Here is a (slightly abbreviated, I think) list of those actions, or “rungs” executed during a typical WordPress request. Thus, an add_action() … Read more
Is it possible to stop a theme activation when a certain plugin is not activated
Using after_switch_theme will activate the theme (which is fine as we want to run the check within the context of the new theme). If the dependencies are not fulfilled ($missing_dependencies = true;) we’re instantly switching back to the theme previously used (passed via after_switch_theme and $oldtheme). add_action( ‘after_switch_theme’, ‘check_theme_dependencies’, 10, 2 ); function check_theme_dependencies( $oldtheme_name, … Read more
Child Theme not loading parent CSS
Take a look at How to create a Child Theme and you’ll see that: the previous method to enqueue the parent stylesheet was to import the parent theme stylesheet using @import: this is no longer best practice. The correct method of enqueuing the parent theme stylesheet is to add a wp_enqueue_scripts action and use wp_enqueue_style() … Read more
Add colors to existing color palette without replacing it
You can merge palettes $existing = get_theme_support( ‘editor-color-palette’ ); $new = array_merge( $existing[0], array( array( ‘name’ => __( ‘Strong magenta’, ‘themeLangDomain’ ), ‘slug’ => ‘strong-magenta’, ‘color’ => ‘#a156b4’, ), array( ‘name’ => __( ‘Light grayish magenta’, ‘themeLangDomain’ ), ‘slug’ => ‘light-grayish-magenta’, ‘color’ => ‘#d0a5db’, ), )); add_theme_support( ‘editor-color-palette’, $new);