This document explains various possibilities for successfully deploying PDFlib as a PHP extension. The generic term PDFlib is used to designate one of the following distinct products:
> PDFlib Lite, the open-source subset of PDFlib
> The commercial PDFlib product
> PDFlib+PDI, a commercial superset of PDFlib which also contains the PDF Import Library (PDI)
> PDFlib Personalization Server (PPS), a superset of PDFlib+PDI with advanced block filling features for personalizing PDF documents.
Notes for PDFlib TET (Text Extraction Toolkit), PDFlib PLOP (Linearization, Optimization, Protection), and PDFlib pCOS (PDF Information Retrieval Tool) are included where appli- cable.

The methods for deploying any of these products as a PHP extension are the same in all cases. However, only one product of the PDFlib family can be used at a time. Similarly, multiple versions of these products cannot be deployed at the same time. Different products can coexist within one PHP installation, however. Note that the evaluation versions of commercial PDFlib products will be fully functional, but will display a demo stamp across all generated PDF pages unless a valid license key is applied.

This document applies to the following software versions:
> PDFlib 7.0.4 and PDFlib 6.0.4
> TET 3.0, PLOP 4.0, and pCOS 2.0
> PHP 4.3.x, 4.4.x, 5.0.x, 5.1.x, 5.2.x, and 5.3.x
Where applicable, version-specific information is provided separately.

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