Creates a new PDF file using the supplied file name. If filename is empty the PDF document will be generated in memory instead of on file. The result must be fetched by the client with the pdf_get_buffer() function. Parameter filename is optional before PHP 4.3.5 or with PDFlib less than 5. Returns TRUE on success or FALSE on failure.
This function is deprecated since PDFlib version 6, use pdf_begin_document() instead.