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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...'.
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10.7 Using PHP
10 FAQ : Foire Aux Questions
 Manuel PHP

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?

10.7.5 Hey, what happened to my newlines?

In PHP, the ending for a block of code is either "?>" or "?>\n" (where \n means a newline). So in the example above, the echoed sentences will be on one line, because PHP omits the newlines after the block ending. This means that you need to insert an extra newline after each block of PHP code to make it print out one newline.

Why does PHP do this? Because when formatting normal HTML, this usually makes your life easier because you don't want that newline, but you'd have to create extremely long lines or otherwise make the raw page source unreadable to achieve that effect.

<< Hey, what happened to my newlines? >>
When I do the following, the output is printed in the wrong order: Using PHP I get the message 'Warning: Cannot send session cookie - headers already sent...' or 'Cannot add header information - headers already sent...'.
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