imagecreatefrom* functions return an image resource identifier, which when cast to a string (saving an option) will result in an empty string(0) “” container. Raw images created by these functions do not have any specific data structure that can be serialized out of the box. Two solutions I can think of: image files Use imagepng, … Read more
Use get_template_directory_uri() print get_template_directory_uri() . ‘/image.jpg’; In child themes use get_stylesheet_directory_uri() if you have replaced the image. In a shortcode this would look like this: <?php /* Plugin Name: Theme URI Shortcode */ add_shortcode(‘theme_uri’, ‘wpse_66026_theme_uri_shortcode’ ); function wpse_66026_theme_uri_shortcode( $attrs = array (), $content=”” ) { $theme_uri = is_child_theme() ? get_stylesheet_directory_uri() : get_template_directory_uri(); return trailingslashit( $theme_uri … Read more
You can set default site for featured images using set_post_thumbnail_size() or request different registered size by providing it as argument in the_post_thumbnail() call.
If you can do SQL manually then try: UPDATE wp_posts p INNER JOIN wp_posts q ON p.post_type=”attachment” AND p.post_mime_type LIKE ‘image/%’ AND (p.post_title IS NULL OR LENGTH(p.post_title) = 0) AND p.post_parent = q.ID SET p.post_title = q.post_title; If you need a PHP function then try: function set_image_without_title_to_post_title() { global $wpdb; $sql = sprintf( “UPDATE %s … Read more
To regenerate custom image size when image is edited in image editor , You have to add following options in wp_options table using update_option function along with add_image_size. Example : $img_size_name=”custom-size”; // The new image size name. if ( function_exists( ‘add_theme_support’ ) ) add_image_size($img_size_name, 100, 100 , true); update_option($img_size_name.’_size_w’, 100); update_option($img_size_name.’_size_h’, 100); update_option($img_size_name.’_crop’, 1);
You’re on the right track with your first snippet – from there it’s easy to remove parts of the url: check what WP has stored as the site root, then use php’s string functions to snip that part out of your image url. // inside the post loop, in a template file if ( has_post_thumbnail()) … Read more
Actually WordPress reduce quality of image when you upload it via media uploader. WordPress has built in compression for JPG images. Whenever you upload an JPG/JPEG image to WordPress media library, WordPress will automatically compress your images to 90% of the original quality, this is intended to help your pages load faster and keep file … Read more
You can optimize uploaded image in wordpress by EWWW Image Optimizer. This plugin giving facility for bulk optimization. So you can compress and optimize image very easily. Also this plugin optimize images according proportion. So optimized image not losing quality. It is very best plugin for image optimization.I am currently using this plugin.
The caption is stored in the image data. The only way to achieve what you require is to use multiple copies of the image and change the image data on each image. To better understand image data go ahead and download an image to your desktop then right click it, go to properties then the … Read more
I think you should use wp_calculate_image_srcset() for the simple reason that it is very complex (it should not have been just one function in the first place). Duplicating it might lead to weird side effects in the future when WP is changing the original algorithm. For the filter problems: You can pass a third parameter … Read more