(PHP 4 >= 4.0.5, PECL pdflib:1.0-2.1.3)
PDF_close_pdi — Close the input PDF document [deprecated]
Closes all open page handles, and closes the input PDF document. 如果成功则返回 TRUE，失败则返回 FALSE。
This function is deprecated since PDFlib version 7, use PDF_close_pdi_document() instead.