FAQ

• 1. What's exactly the license of FPDF? Are there any usage restrictions?
• 2. When I try to create a PDF, a lot of weird characters show on the screen. Why?
• 3. I try to generate a PDF and IE displays a blank page. What happens?
• 4. I can't make line breaks work. I put \n in the string printed by MultiCell but it doesn't work.
• 5. I try to display a variable in the Header method but nothing prints.
• 6. I defined the Header and Footer methods in my PDF class but nothing appears.
• 7. Accented characters are replaced by some strange characters like é.
• 8. I try to display the Euro symbol but it doesn't work.
• 9. I get the following error when I try to generate a PDF: Some data has already been output, can't send PDF file
• 10. I draw a frame with very precise dimensions, but when printed I notice some differences.
• 11. I'd like to use the whole surface of the page, but when printed I always have some margins. How can I get rid of them?
• 12. How can I put a background in my PDF?
• 13. How can I set a specific header or footer on the first page?
• 14. I'd like to use extensions provided by different scripts. How can I combine them?
• 15. How can I send the PDF by email?
• 16. What's the limit of the file sizes I can generate with FPDF?
• 17. Can I modify a PDF with FPDF?
• 18. I'd like to make a search engine in PHP and index PDF files. Can I do it with FPDF?
• 19. Can I convert an HTML page to PDF with FPDF?
• 20. Can I concatenate PDF files with FPDF?

• 1. What's exactly the license of FPDF? Are there any usage restrictions?

  FPDF is released under a permissive license: there is no usage restriction. You may embed it freely in your application (commercial or not), with or without modifications.

• 2. When I try to create a PDF, a lot of weird characters show on the screen. Why?

  These "weird" characters are in fact the actual content of your PDF. This behavior is a bug of IE6. When it first receives an HTML page, then a PDF from the same URL, it displays it directly without launching Acrobat. This happens frequently during the development stage: on the least script error, an HTML page is sent, and after correction, the PDF arrives.
  To solve the problem, simply quit and restart IE.