Check the permissions in your wp-content/uploads folder (and subfolders) – the web server needs to be able to write to it.
The issue was that half of the site still used the old wp-content for images under this method so I ended up changing the wp-admin doing a find and replace instead of a htacess redirect.
This tutorial explains basic use of WordPress media uploader. http://wp.tutsplus.com/tutorials/creative-coding/how-to-integrate-the-wordpress-media-uploader-in-theme-and-plugin-options To add image sizes use <?php add_image_size( $name, $width, $height, $crop ); ?> Read more on this at Codex http://codex.wordpress.org/Function_Reference/add_image_size
You can do this using the wp_handle_upload hook: http://adambrown.info/p/wp_hooks/hook/wp_handle_upload?version=3.4&file=wp-admin/includes/file.php Create a function and add it to this hook so it runs last, it will be passed an array. The array contains the location of the newly uploaded file: add_filter(‘wp_handle_upload’,’wpse_66775_handle_upload’,1000,1); function wpse_66775_handle_upload($args){ $filename = $args[‘file’]; $type = $args[‘type’]; // test if it’s an XML file and … Read more
You should set your MIME types for your pdf. ‘application/pdf’ and/or ‘application/x-pdf’ sorry for the quick answer, no time to go into detail but this should get you on the way
An image in memory takes often much more space than on a disk. The reason: images on a disk are compressed. To create new sizes or apply other changes to the image it has to be uncompressed and depending on color depth and compression algorithm. There is no way to predict the real memory usage … Read more
Welcome to the lions den So you’re willing to get down into the blazing furnace or the lions den and change the upload path. This is so not a good idea without investigating what is happening behind the scenes. I can’t give you a full write up, as there’s so much involved, like filters, options … Read more
Using a filter for jpg_quality will hellp you to set your quality for uplaoded images. add_filter(‘jpeg_quality’, create_function(‘$n’, ‘return 70;’)); In most good implementations of Image Optimization you can find a various usae of ImageOptimization tools such as optimng/jpegtran etc, there a lot of plugins that help you to do that.
You are searching for Ajax. This Q&A may give you an idea: Unattaching images from a post. There are many specialists on the matter here at WPSE, check this search query.
That’s a worst case scenario. Please be confirmed first that, you have deleted files permanently. By default the deleted files are meant to stay in trash.