// If there is an existing image, show it if($existing_image) { echo '
Attached Image ID: ' . $existing_image . '
'; } echo 'Upload an image: '; // See if there's a status message to display (we're using this to show errors during the upload process, though we should probably be using the WP_error class) $status_message = get_post_meta($post->ID,'_xxxx_attached_image_upload_feedback', true); // Show an error message if there is one if($status_message) { echo '
'; echo $status_message; echo '
'; } // Put in a hidden flag. This helps differentiate between manual saves and auto-saves (in auto-saves, the file wouldn't be passed). echo ''; } function xxxx_setup_meta_boxes() { // Add the box to a particular custom content type page add_meta_box('xxxx_image_box', 'Upload Image', 'xxxx_render_image_attachment_box', 'post', 'normal', 'high'); } add_action('admin_init','xxxx_setup_meta_boxes');
function xxxx_update_post($post_id, $post) { // Get the post type. Since this function will run for ALL post saves (no matter what post type), we need to know this. // It's also important to note that the save_post action can runs multiple times on every post save, so you need to check and make sure the // post type in the passed object isn't "revision" $post_type = $post->post_type; // Make sure our flag is in there, otherwise it's an autosave and we should bail. if($post_id && isset($_POST['xxxx_manual_save_flag'])) { // Logic to handle specific post types switch($post_type) { // If this is a post. You can change this case to reflect your custom post slug case 'post': // HANDLE THE FILE UPLOAD // If the upload field has a file in it if(isset($_FILES['xxxx_image']) && ($_FILES['xxxx_image']['size'] > 0)) { // Get the type of the uploaded file. This is returned as "type/extension" $arr_file_type = wp_check_filetype(basename($_FILES['xxxx_image']['name'])); $uploaded_file_type = $arr_file_type['type']; // Set an array containing a list of acceptable formats $allowed_file_types = array('image/jpg','image/jpeg','image/gif','image/png'); // If the uploaded file is the right format if(in_array($uploaded_file_type, $allowed_file_types)) { // Options array for the wp_handle_upload function. 'test_upload' => false $upload_overrides = array( 'test_form' => false ); // Handle the upload using WP's wp_handle_upload function. Takes the posted file and an options array $uploaded_file = wp_handle_upload($_FILES['xxxx_image'], $upload_overrides); // If the wp_handle_upload call returned a local path for the image if(isset($uploaded_file['file'])) { // The wp_insert_attachment function needs the literal system path, which was passed back from wp_handle_upload $file_name_and_location = $uploaded_file['file']; // Generate a title for the image that'll be used in the media library $file_title_for_media_library = 'your title here'; // Set up options array to add this file as an attachment $attachment = array( 'post_mime_type' => $uploaded_file_type, 'post_title' => 'Uploaded image ' . addslashes($file_title_for_media_library), 'post_content' => '', 'post_status' => 'inherit' ); // Run the wp_insert_attachment function. This adds the file to the media library and generates the thumbnails. If you wanted to attch this image to a post, you could pass the post id as a third param and it'd magically happen. $attach_id = wp_insert_attachment( $attachment, $file_name_and_location ); require_once(ABSPATH . "wp-admin" . '/includes/image.php'); $attach_data = wp_generate_attachment_metadata( $attach_id, $file_name_and_location ); wp_update_attachment_metadata($attach_id, $attach_data); // Before we update the post meta, trash any previously uploaded image for this post. // You might not want this behavior, depending on how you're using the uploaded images. $existing_uploaded_image = (int) get_post_meta($post_id,'_xxxx_attached_image', true); if(is_numeric($existing_uploaded_image)) { wp_delete_attachment($existing_uploaded_image); } // Now, update the post meta to associate the new image with the post update_post_meta($post_id,'_xxxx_attached_image',$attach_id); // Set the feedback flag to false, since the upload was successful $upload_feedback = false; } else { // wp_handle_upload returned some kind of error. the return does contain error details, so you can use it here if you want. $upload_feedback = 'There was a problem with your upload.'; update_post_meta($post_id,'_xxxx_attached_image',$attach_id); } } else { // wrong file type $upload_feedback = 'Please upload only image files (jpg, gif or png).'; update_post_meta($post_id,'_xxxx_attached_image',$attach_id); } } else { // No file was passed $upload_feedback = false; } // Update the post meta with any feedback update_post_meta($post_id,'_xxxx_attached_image_upload_feedback',$upload_feedback); break; default: } // End switch return; } // End if manual save flag return; } add_action('save_post','xxxx_update_post',1,2);
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