FPDF

FPDF is a PHP class library which allows you to generate PDF files with pure PHP, that is to say without using the PDFlib library. The F in FPDF stands for free libre open and you may use it for any kind of usage and modify it to suit your needs. FPDF requires no extension (except zlib to activate compression and GD for GIF support) and works with PHP4 and PHP5.

If you need Unicode UTF8 support you might prefer TCPDF

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REFERRERS
PdfLib
PhpPdf