Reject upload of wrong-sized images using the Media Uploader
In your handler, if you set ‘error’, the error message will be displayed and will cancel the upload add_filter( ‘wp_handle_upload_prefilter’, ‘custom_upload_filter’ ); function custom_upload_filter( $file ) { $image_info = getimagesize( $file[‘tmp_name’] ); $image_width = $image_info[0]; $image_height = $image_info[1]; if ( $image_with !== 800 || $image_height !== 600 ) { $file[‘error’] = __( ‘Images must be … Read more