(PECL ps >= 1.1.0)
Adds link to a page in a second pdf document
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's source position is a rect