(PHP 4 >= 4.0.5, PECL pdflib >= 1.0.0)
PDF_attach_file — Add file attachment for current page [deprecated]
Adds a file attachment annotation. 성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.
This function is deprecated since PDFlib version 6, use PDF_create_annotation() with type=FileAttachment instead.