10.7 Using PHP

This section gathers many common errors that you may face while writing PHP scripts.

Sommaire :

• I would like to write a generic PHP script that can handle data coming from any form. How do I know which POST method variables are available?
• I need to convert all single-quotes (') to a backslash followed by a single-quote (\'). How can I do this with a regular expression? I'd also like to convert " to \" and \ to \\.
• All my " turn into \" and my ' turn into \', how do I get rid of all these unwanted backslashes? How and why did they get there?
• When I do the following, the output is printed in the wrong order:
• Hey, what happened to my newlines?
• I get the message 'Warning: Cannot send session cookie - headers already sent...' or 'Cannot add header information - headers already sent...'.
• I need to access information in the request header directly. How can I do this?
• When I try to use authentication with IIS I get 'No Input file specified'.
• My PHP script works on IE and Lynx, but on Netscape some of my output is missing. When I do a "View Source" I see the content in IE but not in Netscape.
• How am I supposed to mix XML and PHP? It complains about my <?xml tags!
• How can I use PHP with FrontPage or some other HTML editor that insists on moving my code around?
• Where can I find a complete list of variables are available to me in PHP?
• How can I generate PDF files without using the non-free and commercial libraries
• I'm trying to access one of the standard CGI variables (such as $DOCUMENT_ROOT or $HTTP_REFERER) in a user-defined function, and it can't seem to find it. What's wrong?