I hadn’t done this myself but I have How to insert image in Markdown syntax in WordPress stashed for later that shows how to customize markup of inserted image. It makes use of image_send_to_editor filter in get_image_send_to_editor() function.
no need to use a custom table, use an option, and the add_attachment hook: function wpa59168_rename_attachment( $post_ID ) { $post = get_post( $post_ID ); $file = get_attached_file( $post_ID ); $path = pathinfo( $file ); $count = get_option( ‘wpa59168_counter’, 1 ); // change to $new_name = $count; if you want just the count as filename $new_name … Read more
This can be done by using: wp_get_attachment_metadata(); wp_update_attachment_metadata(); You’d get the meta data for it and change it around then save it. The $data array you get contains another array named sizes, this array contains all the different size images connected to the attachment. You want this to update automatically when you upload images that … Read more
There’s no default way to do that yet, though there is a Trac ticket. I found this (untested) that may work for you: http://www.devblog.fr/2011/05/16/plusieurs-fonds-personnalises-wordpress-add_custom_background/ It’s also worth noting the 3.4’s new way of defining a default background (still just one, though). Edit Here’s the code: <?php function wpse48332_setup_theme() { // Add support for custom backgrounds … Read more
Use the jpeg_quality and wp_editor_set_quality filters to set the quality of resized images: add_filter( ‘wp_editor_set_quality’, ‘wpse246186_image_quality’ ); add_filter( ‘jpeg_quality’, ‘wpse246186_image_quality’ ); function wpse246186_image_quality( $quality ) { return 100; // 0 – 100% quality } I have not been able to reproduce the issue reported; the original PNG image looks the same as the thumbnails. Tested … Read more
If you use WP-CLI then that will automatically delete those sizes that you don’t need. You would run the following command on your server via SSH. You will need to have WP-CLI installed on the server. wp media regenerate –only-missing You could also use find . -name “*-*x*.*” | xargs rm -f to delete all … Read more
Some suggestions: If you want to try out the Image Editor API you can try to replace imagejpeg( $resource, $image, 35 ); with: $editor = wp_get_image_editor( $image ); if ( ! is_wp_error( $editor ) ) { $editor->set_quality( 35 ); $editor->save( $image ); } unset( $editor ); Also try to test e.g. these parts: $resource = … Read more
Directly accessing the filesystem for writing is evil… for most of the cases where people are actually doing that. If you’re editing an image file, and it is in the wp-content/uploads directory, then you know, whatever. That’s not the common case. Plugins and themes don’t typically do that because they don’t have to do that. … Read more
You could do like this: function image_tag_class($class) { $class .= ‘ my-custom-class’; return $class; } add_filter(‘get_image_tag_class’, ‘image_tag_class’ ); in case you wanna know more about actions and hooks. Difference Between Filter and Action Hooks? add_filter add_action
If you’re working within a template file, this code should work. However, I didn’t test it. <?php echo do_shortcode(”); ?>