I agree with Tom J Nowell on the use of SVG, but if the upload is an actual image, you can tap into the attachment attributes using, as you suggested, wp_get_attachment_image_src. Those dimensions are actually already recorded and stored when using the WP media uploader, it’s likely that the plugin you’re using makes use of … Read more
The Image Widget plugin uses the media uploader. You may want to look at its code source. It is very simple.
Actually, it’s very easy to attach images to posts and pages from directly within the editor. Just click on the Add an Image button (immediately to the right of Upload/Insert) to access the uploader. You can upload as many images as you want to the media gallery for that page and edit the meta information … Read more
Use add_image_size() in your functions.php: add_image_size( ‘post-icon’, 150); …and then use this in your template: <?php the_post_thumbnail(‘post-icon’); ?>
You can simply set all unused image size attributes to 0 to stop WordPress generating them. Whilst this only applies for default image sizes, you can use filters to remove them. In general, WP stores all those sizes to generate images for in the global $_wp_additional_image_sizes. The following plugin uses a filter to remove sizes … Read more
Haven’t tested it, but this should work: // check for file upload size // { if( !current_user_can( ‘administrator’) ) add_filter( ‘wp_handle_upload_prefilter’, ‘mdu_validate_image_size’ ); } add_filter(‘wp_handle_upload_prefilter’,’mdu_validate_image_size’); function mdu_validate_image_size( $file ) { if ( mime_content_type($file) == ‘application/zip’ ) { mdu_validate_zip_image_size($file); return $file; } $image = getimagesize($file[‘tmp_name’]); $minimum = array( ‘width’ => ‘800’, ‘height’ => ‘450’ ); $maximum … Read more
Unfortunately wp_handle_upload_prefilter hook does not recognize an attachment ID yet. It’s too early and runs the pre-sanitized file name (before moving the attachment and storing it as a post) The Logic What you can do is use that hook wp_handle_upload_prefilter but instead, store a transient with a short life that contains the pre-sanitized file name. … Read more
Personally, the first thing I would do after matching the attributes is to create an associative array of: array( ‘attribute_name’ => ‘attribute_value’ ) It will make it easier to get the attribute directly than having to search the array and I think overall it will make the code more direct. Since we know that index … Read more
WordPress has a function solely designed for this purpose. the attachment_url_to_postid() allows you to retrieve an attachment’s ID from it’s URL, which then you can use to get the post’s ID later. If you want to do it by writing a MySQL query, i would however prefer to suggest searching the file’s name in meta_value … Read more
A few weeks ago I added a feature similar to Magic Fields. Here’s the github project. The most important thing is in this file: js/custom_fields/media_image.js