(PHP 4 >= 4.0.5, PECL pdflib >= 1.0.0)
PDF_add_note — Set annotation for current page [deprecated]
$pdfdoc
   , float $llx
   , float $lly
   , float $urx
   , float $ury
   , string $contents
   , string $title
   , string $icon
   , int $open
   )
   Sets an annotation for the current page. Returns TRUE on success or FALSE on failure.
  
   This function is deprecated since PDFlib version 6, use
   PDF_create_annotation() with
   type=Text instead.