PDF document page abstraction is represented by
PDF pages either are loaded from existing PDF, or created.
New page can be obtained by creating new
Zend_Pdf_Page object or calling
Zend_Pdf::newPage() method, which returns
The difference is that
Zend_Pdf::newPage() method creates a page, already attached to
the document. In difference from unattached pages it can't be used with several PDF documents,
but has a little bit better performance.
. It's your choice, which approach should be used.
Zend_Pdf::newPage() method and
Zend_Pdf_Page constructors take the same
set of parameters specifying page size. It either the size of page ($x, $y) in a points (1/72 inch),
or predefined constant, which is treated as a page type:
Document pages are stored in
$pages public member of
It's an array of
Zend_Pdf_Page objects. It completely defines set and order of document pages
and can be manipulated as a common array:
Example #1 PDF document pages management.
... // Reverse page order $pdf->pages = array_reverse($pdf->pages); ... // Add new page $pdf->pages = new Zend_Pdf_Page(Zend_Pdf_Page::SIZE_A4); // Add new page $pdf->pages = $pdf->newPage(Zend_Pdf_Page::SIZE_A4); // Remove specified page. unset($pdf->pages[$id]); ...
Existing PDF page can be cloned by creating new
Zend_Pdf_Page object with existing page as a parameter:
Example #2 Cloning existing page.
... // Store template page in a separate variable $template = $pdf->pages[$templatePageIndex]; ... // Add new page $page1 = new Zend_Pdf_Page($template); $pdf->pages = $page1; ... // Add another page $page2 = new Zend_Pdf_Page($template); $pdf->pages = $page2; ... // Remove source template page from the documents. unset($pdf->pages[$templatePageIndex]); ...
It's useful if you need several pages to be created using one template.
Important! Cloned page shares some PDF resources with a template page, so it can be used only withing the same document as a template page. Modified document can be saved as new one.