Attach pdf file to custom post type

3 comments

1. Here this is my code which i used in my wordpress site in custom post type for adding the pdf to the post and its work for me try to change its and use it. Hope it will help

   function add_custom_meta_boxes() {  
       add_meta_box('wp_custom_attachment', 'Hotel Brochure', 'wp_custom_attachment', 'hotel_post', 'normal', 'high');  
   }
   add_action('add_meta_boxes', 'add_custom_meta_boxes');  
   
   function wp_custom_attachment() {  
       wp_nonce_field(plugin_basename(__FILE__), 'wp_custom_attachment_nonce');
       $html = '<p class="description">';
       $html .= 'Upload your PDF here.';
       $html .= '</p>';
       $html .= '<input type="file" id="wp_custom_attachment" name="wp_custom_attachment" value="" size="25">';
       echo $html;
   }
   
   add_action('save_post', 'save_custom_meta_data');
   function save_custom_meta_data($id) {
       if(!empty($_FILES['wp_custom_attachment']['name'])) {
           $supported_types = array('application/pdf');
           $arr_file_type = wp_check_filetype(basename($_FILES['wp_custom_attachment']['name']));
           $uploaded_type = $arr_file_type['type'];
   
           if(in_array($uploaded_type, $supported_types)) {
               $upload = wp_upload_bits($_FILES['wp_custom_attachment']['name'], null, file_get_contents($_FILES['wp_custom_attachment']['tmp_name']));
               if(isset($upload['error']) && $upload['error'] != 0) {
                   wp_die('There was an error uploading your file. The error is: ' . $upload['error']);
               } else {
                   update_post_meta($id, 'wp_custom_attachment', $upload);
               }
           }
           else {
               wp_die("The file type that you've uploaded is not a PDF.");
           }
       }
   }
   
   function update_edit_form() {
       echo ' enctype="multipart/form-data"';
   }
   add_action('post_edit_form_tag', 'update_edit_form');
   

   To get the PDF

   $hotel_brochure = get_post_meta( $post_id, 'wp_custom_attachment', true );
   $hotel_brochure['url']
   

2. I just got this working last night using the above code (and the extra comment) and there are a few things I’d like to add here. First, in the “To get the PDF” section, ‘wpcf-brochure’ should be changed to ‘wp_custom_attachment’. Next, to answer the final question from OP, to make it appear in the back end, here’s the technique I used. Before the line that says “echo $html;” in functions.php, add:

   $filearray = get_post_meta( get_the_ID(), 'wp_custom_attachment', true );
   $this_file = $filearray['url'];
   if($this_file != ""){
      $html .= '<div>Current file:<br>"' . $this_file . '"</div>';
   }
   

3. Here is a little boost for the one who wants to fix and fix the accepted answer:

   define('PREFIX', 'a-good-prefix-');
   

   echo '<input type="file" name="' . PREFIX . 'attachment">';
   

   add_action('save_post', function ($post_id) {
     $key = PREFIX . 'attachment';
     if (empty($_FILES[$key]['name'])) return;
     if (metadata_exists('post', $post_id, $key)) {
       unlink(get_post_meta($post_id, $key, true)['file']);
     }
     $name = $_FILES[$key]['name'];
     $tmp = $_FILES[$key]['tmp_name'];
     $bits = file_get_contents($tmp);
     $upload = wp_upload_bits($name, null, $bits);
     if (isset($upload['error']) && $upload['error'] !== false) {
       wp_die('Upload error: ' . $upload['error']);
     } else {
       update_post_meta($post_id, $key, $upload);
     }
   });
   

   Actual sources: https://code.tutsplus.com/articles/attaching-files-to-your-posts-using-wordpress-custom-meta-boxes-part-1–wp-22291.

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