I don’t know if this is the best way to do this, but it works for me. In the functions.php of the theme you are using, put this: function remove_img_src($html) { $html = preg_replace(‘@(width|height)=”([0-9])+” ?@i’, ”, $html); return $html; } add_filter(‘image_send_to_editor’, ‘remove_img_src’, 10, 8); It uses regular expresions to change the output that is inserted … Read more
add_filter( ‘the_content’, ‘attachment_image_link_remove_filter’ ); function attachment_image_link_remove_filter( $content ) { $content = preg_replace( array(‘{<a(.*?)(wp-att|wp-content\/uploads)[^>]*><img}’, ‘{ wp-image-[0-9]*” /></a>}’), array(‘<img’,'” />’), $content ); return $content; } The regex could be simpler and unfortunately this also deprives you of the unique wp-image-xxx (where xxx is the attachment ID) class of the <img> tag, but it’s the safest one I … Read more
Just found a new plugin which seems to do exactly what I described above: http://wordpress.org/extend/plugins/additional-image-sizes-zui/ Hope this helps someone!
Research The question Filter For Featured Image lead to this answer: How to hook update_post_meta and delete_post_meta?. Coupled with the a fine global variable ($_wp_additional_image_sizes) revealed here: How to get a list of all the possible thumbnail sizes set within a theme, bring us to the code that catches the “Use as featured image” action … Read more
Gee, I keep solving my own problems all the time. Here’s how I solved it in the end. I discovered that add_image_size does not ignore the identical dimensions of the image size, but instead points the file name towards the same file in the uploads dir. Once I knew that, I could just save the … Read more
You can use the wp_generate_attachment_metadata filter: function wpse_183835_to_jpeg( $meta, $post_id ) { $sizes_to_convert = array( ‘thumbnail’, ); $path = dirname( get_attached_file( $post_id ) ); foreach ( $sizes_to_convert as $size ) { if ( ! empty( $meta[‘sizes’][ $size ] ) ) { $data = $meta[‘sizes’][ $size ]; if ( $data[‘mime-type’] === ‘image/png’ && is_file( $file = … Read more
If you only want to add an extra class, then you should use wp_get_attachment_image. It has few extra params, and the last one is used for setting class names. Sample usage: <?php echo wp_get_attachment_image( get_the_ID(), ‘thumbnail’, “”, [“class” => “my-custom-class”] ); ?> The main advantage of this aproach is that you will also get the … Read more
The easiest and simplest way to do it is define a unique variable in your theme’s functions.php file. Such as: <?php $theme_name_images = get_bloginfo(‘stylesheet_directory’) . ‘/images/’; ?> No need for classes as a previous answer suggested. EDIT: It should be get_bloginfo, instead of bloginfo(), as Viper007Bond kindly pointed out.
The featured image attachment id is stored in the post_meta table, with the meta_key _thumbnail_id. Use that post id to find the post meta with meta_key _wp_attachment_metadata. The value of that is a serialized array with keys thumb, file, width, height, sizes (an array), and image_meta (an array). The file value is relative to the … Read more
Unfortunately there is no legal way to control it. But there is a dirty way to do it… If you select this route, then you will need to : clone the standard gallery_shortcode function add a default value for $attr[‘link’] option hook your cloned function into post_gallery filter The final result will look like this: … Read more