The pages in a PDF document are represented as
Zend_Pdf_Page instances in Zend_Pdf.
PDF pages either are loaded from an existing PDF
or created using the Zend_Pdf API.
New pages can be created by instantiating new Zend_Pdf_Page
objects directly or by calling the Zend_Pdf::newPage() method,
which returns a Zend_Pdf_Page object.
Zend_Pdf::newPage() creates a page that is already attached to
a document. Attached pages can't be used with another PDF
documents until it's not cloned. See Page
cloning section for the details.
The Zend_Pdf::newPage() method and the
Zend_Pdf_Page constructor take the same parameters specifying
page size. They can take either the size of page ($x, $y) in points (1/72 inch) or a
predefined constant representing a page type:
Zend_Pdf_Page::SIZE_A4
Zend_Pdf_Page::SIZE_A4_LANDSCAPE
Zend_Pdf_Page::SIZE_LETTER
Zend_Pdf_Page::SIZE_LETTER_LANDSCAPE
Document pages are stored in the $pages public attribute of the
Zend_Pdf class. The attribute holds an array of
Zend_Pdf_Page objects and completely defines the instances and
order of pages. This array can be manipulated like any other PHP
array:
Example 642. PDF document pages management
<?php
...
// 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]);
...