说明
bool
ps_add_pdflink ( resource psdoc, float llx, float lly, float urx, float ury, string filename, int page, string dest )
Places a hyperlink at the given position pointing to a second pdf document.
Clicking on the link will branch to the document at the given page. The
first page in a document has number 1.
The hyperlink start is a rectangle with its lower left corner at
(llx, lly) and its upper
right corner at (urx, ury).
The rectangle has by default a thin blue border.
The hyperlink will not be visible if the document is printed or viewed but
it will show up if the document is converted to pdf by either Acrobat
DistillerTM or Ghostview.