Custom Post Type mit Dateianhänge

add_action( 'init', 'cpt_weanforderung_erstellen' );
/*Funktion zum erstellen des CPT´s*/
function cpt_weanforderung_erstellen() {
    register_post_type( 'weanforderung',
    array(
    'label'  => 'WE-Anforderng',
    'public' => true,
    'show_ui' => true,
    'menu_position' => 15,
    'rewrite' => array('slug' => 'weanforderung'),
    'supports' => array( 'custom-fields', 'thumbnail' ),
    )
    );
}


add_action('add_meta_boxes','weanforderung_add_custom_box');
add_action( 'save_post', 'weanforderung_save' );
add_action('post_edit_form_tag', 'post_edit_form_tag');
function post_edit_form_tag() {
    echo ' enctype="multipart/form-data"';
}
/* Funktionsaufruf welche die Custom Field erstellt*/
function weanforderung_add_custom_box(){
    add_meta_box(
    'weanforderung_id',
    'WE-Anforderung',
    'weanforderung_formular_box',
    'weanforderung','normal','high'    
    );
}
/*Hier werden die Customs Fields definiert*/
function weanforderung_formular_box(){
global $post;
    wp_nonce_field( plugin_basename( __FILE__ ), 'weanforderung_nonce' );
    ?>
    <label for="Vim">Vim: </label>
    <?php $vim=get_post_meta(get_the_ID(), '_vim',true);?>
    <input type="text" id="weanforderung_vim" name="vim" value="<?php echo $vim;?>"/><br/>
    <label for="Bestellnummer">BE-Nummer: </label>
    <?php $benr=get_post_meta(get_the_ID(), '_benr',true);?>
    <input type="text" id="weanforderung_benr" name="benr" value="<?php echo $benr;?>"/><br/>
    <label for="Lieferant">Lieferant: </label>
    <?php $lief=get_post_meta(get_the_ID(), '_lief',true);?>
    <input type="text" id="weanforderung_lief" name="lief" value="<?php echo $lief;?>"/><br/>
    <label for="Lieftermin">Lieferantentermin: </label>
    <?php $lterm=get_post_meta(get_the_ID(), '_lterm',true);?>
    <input type="text" id="weanforderung_lterm" name="lterm" value="<?php echo $lterm;?>"/><br/>
    <label for="Kunde">Kunde: </label>
    <?php $kunde=get_post_meta(get_the_ID(), '_kunde',true);?>
    <input type="text" id="weanforderung_kunde" name="kunde" value="<?php echo $kunde;?>"/><br/>
    <label for="Auftrag">Auftrag: </label>
    <?php $au=get_post_meta(get_the_ID(), '_au',true);?>
    <input type="text" id="weanforderung_au" name="au" value="<?php echo $au;?>"/><br/>
    <label for="Kundentermin">Kundentermin: </label>
    <?php $kdterm=get_post_meta(get_the_ID(), '_kdterm',true);?>
    <input type="text" id="weanforderung_kdterm" name="kdterm" value="<?php echo $kdterm;?>"/><br/>
    <label for="Bemerkung">Bemerkung: </label>
    <?php $bem=get_post_meta(get_the_ID(), '_bem',true);?>
    <input type="text" id="weanforderung_bem" name="bem" value="<?php echo $bem;?>"/><br/>
    <?php
    
    $custom = get_post_custom($post->ID);
    $pdf = wp_get_attachment_link(get_post_meta($post->ID,'pdfa',true)) 
    
?>


<label>PDF:</label><input type="file" name="pdf_file" value="<?php echo $pdf; ?>" /><br /><?php echo $pdf;?><br />






    
    
    
    
<?php } 


/*Prozedur um die EIngabe zu speichern*/
function weanforderung_save( $post_id ) {
global $wpdb;
global $post;
  if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
    return;
  if ( !wp_verify_nonce( $_POST['weanforderung_nonce'], plugin_basename( __FILE__ ) ) )
      return;
  if ( 'page' == $_POST['weanforderung'] ) {
      if ( !current_user_can( 'edit_page', $post_id ) )
          return;
  } else {
      if ( !current_user_can( 'edit_post', $post_id ) )
          return;
  }
  /*FILE-UPLOAD*/
  if($_FILES["pdf_file"]) {
    global $post;
        // check filetype is pdf and return if not
        $file_type = $_FILES['pdf_file']['type'];
    if($file_type != 'application/pdf') return;
        // upload the file
    $overrides = array( 'test_form' => false);
    $file = wp_handle_upload($_FILES["pdf_file"],$overrides);
          if(isset($file['file'])) {
            // Gather data for attachment
            $title = str_replace(".pdf","",$_FILES["pdf_file"]['name']);
            $attachment = array(
                'post_mime_type' => $file_type,
                'post_title' => addslashes($title),
                'post_content' => '',
                'post_status' => 'inherit',
                'post_parent' => $post->ID
            );
            //create attachment & update metadata
            $attach_id = wp_insert_attachment( $attachment, $file['file'] );
            // Before we update the post meta, trash any previously uploaded pdfs for this post.
            $existing_pdfa = (int) get_post_meta($post->ID,'pdfa', true);
            if(is_numeric($existing_pdfa)) {
                wp_delete_attachment($existing_pdfa);
            }
            // Now, update the post meta to associate the new pdf with the post
            update_post_meta($post->ID, "pdfa", $attach_id);
        }
    }


  /*Setzen der Variablen */
  $vim = $_POST['vim'];
  $benr = $_POST['benr'];
  $lief = $_POST['lief'];
  $lterm = $_POST['lterm'];
  $kunde = $_POST['kunde'];
  $au = $_POST['au'];
  $kdterm = $_POST['kdterm'];
  $bem = $_POST['bem'];
  
  
  
  /*Die Daten werden endgültig gespeichert */
  update_post_meta( $post_id, '_vim', $vim );
  update_post_meta( $post_id, '_benr', $benr );
  update_post_meta( $post_id, '_lief', $lief );
  update_post_meta( $post_id, '_lterm', $lterm );
  update_post_meta( $post_id, '_kunde', $kunde );
  update_post_meta( $post_id, '_au', $au );
  update_post_meta( $post_id, '_kdterm', $kdterm );
  update_post_meta( $post_id, '_bem', $bem );
 
  
  /*Der Titel wird automatisch unter der Bestellnummer gespeichert */
  $title = $_POST['benr'];
  $where = array( 'ID' => $post_id );
  $wpdb->update( $wpdb->posts, array( 'post_title' => $title ), $where );
}