I’m facing an annoying issue that I can’t solve.

I’ve made this code in order to add or update an attachment on a custom post type :

function add_update_attachment( $  postID, $  photo ) {    if ($  photo == '') return;   $  basename = basename($  photo);   $  basenameExp = explode("?", $  basename);   $  name = $  basenameExp[0];   $  attach = array_shift(get_attached_media('image', $  postID));     $  attachName = basename( $  attach->guid );   $  wp_upload_dir = wp_upload_dir();   $  fileName = $  wp_upload_dir['path']. "/".urldecode($  name);      $  fileType = wp_check_filetype( $  name, null );   // echo '<pre>'.print_r($  wp_upload_dir, true).'</pre>';     $  attachment = array(         'guid'           => $  wp_upload_dir['url'] . '/' .  $  name ,         'post_mime_type' => $  fileType['type'],         'post_title'     => preg_replace( '/\.[^.]+$  /', '', $  name ),         'post_content'   => '',         'post_status'    => 'inherit'     );      if ( str_replace('%20', ' ', $  attachName) !== $  photo ) {         wp_update_post( array( 'ID' => $  attach->ID, 'post_parent' => 0) );         copy ( $  photo, $  wp_upload_dir['path']. "/" . urldecode($  name) );         $  attachID = wp_insert_attachment( $  attachment, $  fileName, $  postID );         $  attachData = wp_generate_attachment_metadata( $  attachID, $  fileName );         wp_update_attachment_metadata( $  attachID, $  attachData );         set_post_thumbnail( $  postID, $  attachID );     } } 

The problem is that : some of my post are dupplicating for no reason.

I have this post (I’m showing a custom field only) :

Array (     [0] => LieuTemp001     [1] => LieuTemp002 ) 

And the last one is dupplicated. Why ? I have no problem if I don’t use this function (but I need to use it, obsviously)