theme-development - Read For Learn

Get the first image from post content (eg.: hotlinked images)

If you want display an image that is inserted into your content (a hotlinked image, for example), you must use a function like this (source): add in functions.php: function catch_that_image() { global $post, $posts; $first_img = ”; ob_start(); ob_end_clean(); $output = preg_match_all(‘/<img.+src=[\'”]([^\'”]+)[\'”].*>/i’, $post->post_content, $matches); $first_img = $matches [1] [0]; if(empty($first_img)){ //Defines a default image $first_img … Read more

The proper way to include/require PHP files in WordPress

If you check https://codex.wordpress.org/Function_Reference/get_template_directory_uri You will see get_template_directory_uri() returns a uri, not a server path. You should use instead the get_template_directory() function: include get_template_directory() . ‘subdir/filename.php’; For a plugin you can use the plugin_dir_path() function: include plugin_dir_path( __FILE__ ) . ‘subdir/filename.php’;

The the_post_thumbnail without srcset?

I want to disable the srcset only when calling a specific thumbnail size (for example only when calling full image size). Here are two ideas (if I understand you correctly): Approach #1 Let’s check the size from the post_thumbnail_size filter. If it matches a corresponding size (e.g. full) then we make sure the $image_meta is … Read more

How can I add a URL field to the attachments window?

I use a very rough plugin to add information about the artist and a URL to media files. It needs some tweaking (and I need the time), but it works and may demonstrate how add the extra fields and how to use them in your theme: <?php /* Plugin Name: Media Artist Field Description: Adds … Read more

how can I add an icon/image for a child theme?

Leave a file with the name screenshot.png inside the root of your child theme folder and it works. The recommended image size is 600×450. The screenshot will only be shown as 300×225, but the double-sized image allows for high-resolution viewing on HiDPI displays. see on Codex

Custom single template for a specific category

From my comment to the OP My opinion, use what you are comfortable with. If there are any performance difference it will be minute/irrelevant. My preference, use the filter To come to your real concern/question, in my opinion, the best approach will be to use the parent category ID and work from there. It will … Read more

Can I create my own “Recent Posts” widget or customize the existing one?

It’s usually best to copy the existing one, name it something unique, and then add your own functionality. Copy the WP_Widget_Recent_Posts class from wp-includes/class-wp-widget-recent-posts.php into your functions.php (or, preferably, another file in your theme devoted just to widgets) and rename to something else, like My_Widget_Recent_Posts Add your functionality in there. Don’t forget to call register_widget(‘My_Widget_Recent_Posts’) … Read more

wp_redirect() – headers already sent

Found the answer (via) Instead of using the function I added an action to “wp_loaded”, that makes sure that it gets loaded before any headers are sended. <?php add_action (‘wp_loaded’, ‘my_custom_redirect’); function my_custom_redirect() { if ( isset( $_POST[‘subscribe’] ) ) { $redirect=”http://example.com/redirect-example-url.html”; wp_redirect($redirect); exit; } } ?>

Solutions for generating dynamic javascript / CSS

One additional option, depending on the kind of parameters you need to pass in. Let’s call it (2a). You can also create PHP scripts which output dynamically-generated text/css or text/javascript rather than text/html, and provide them the data that they need using GET parameters rather than by loading up WordPress. Of course this only works … Read more

Theme Activate Hook

I have that code here just name the file theme_activation_hook.php like on the website and copy this. <?php /** * Provides activation/deactivation hook for wordpress theme. * * @author Krishna Kant Sharma (http://www.krishnakantsharma.com) * * Usage: * ———————————————- * Include this file in your theme code. * ———————————————- * function my_theme_activate() { * // code … Read more

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