The problem is that your output_pdf() function is being called too early. You have the function running in the root of the main plugin file, meaning that it runs as soon as the plugin is loaded, and before before WordPress has finished loading. You need to at least hook it to run later, such as … Read more
This might not solve the problem, but what you’re currently doing looks unnecessarily convoluted (ajax request, fake link, serve PDF via link click etc.) Why not just a link styled as a button… <a class=”button” href=”<?= admin_url( ‘admin-post.php?action=wpse_212972_pdf’ ) ?>”>Download</a> …and then serve the PDF as a download directly from the server (using WP’s generic … Read more
Right now, the support for tagging media is pretty disappointing. You can add tags or categories to the attachment post type, but you’ll find the UI is unacceptably bad (it’s a text box where you enter terms separated by commas). There’s a plugin Media Tags that is decent though, so you might look into that. … Read more
Turn off PHP Safe Mode, or get your host to do it for you. Lots and lots of things won’t work in safe mode. C’mon. Live on the edge. That’s where the fun is. 🙂
Yes it’s possible. File upload is a default feature of WordPress. You don’t need to use plugins for this. Read how to upload files in WordPress.
Thanks to @BrianFegter comment, I was able to find and fix the problem. It was just a problem of case-sensitivity. My development environment, http://serverpress.com/products/desktopserver/ , doesn’t have a problem with finding the pdf when the file name was caps and the anchor tag link was in lower case. My hosting provider seems to be the … Read more
The pdf is itself an attachment post so in wordpress template hierarchy we can create a template named pdf.php Then you can write following code in it which force download the pdf file. <?php if (have_posts()) : the_post(); $pdf_title = $post->post_title; $pdf_src = get_attached_file($post->ID ); $bytes = filesize( $pdf_src ); header(“Pragma: public”); // required header(“Expires: … Read more
Using add_rewrite_endpoint <?php if ( ! class_exists( ‘PDFRewriteEndpoint’ ) ): class PDFRewriteEndpoint { /** * Add actions and filters in constructor. */ public function __construct() { add_action( ‘parse_request’, array ( $this, ‘sniff_requests’ ), 0 ); add_action( ‘init’, array ( $this, ‘add_endpoint’ ), 0 ); } /** * Add rewrite rules. */ public function add_endpoint() { … Read more
Despite you already solved it (the “undefined” issue), it should be noted that wp_generate_attachment_metadata() is defined in wp-admin/includes/image.php, so you need to manually load that file if you’re using the function on the front-end, i.e. public side of the site or non admin/wp-admin pages (e.g. single attachment pages). And in fact, the function reference says … Read more
You can try to do it in two ways. The first one, much more simple, is to save a temporary PDF file somewhere, for example in a uploads directory, use it as attachment and delete if after the call to wp_mail() function is made: function my_custom_save_post( $post_id, $post, $update ) { if( ! $update ) … Read more