Zend_Pdf module is a PDF (Portable Document Format) manipulation engine written entirely in PHP 5. It can load existing documents, create new, modify and save modified documents. Thus it can help any PHP-driven application dynamically prepare documents in a PDF by modifying existing template or generating document from a scratch. Zend_Pdf module supports the following features:
Create new document or load existing one. 
Retrieving specified revision of the document.
Manipulate pages within document. Changing page order, adding new pages, removing pages from a document.
Different drawing primitives (lines, rectangles, polygons, circles, ellipses and sectors).
Text drawing by using one of 14 standard fonts.
Image drawing. 
Incremental PDF file update.