Being redirected from page 2 page in PHP

Anon

Why I cant output nothing before the header.!!
This make no sense as there are many cases that an output need to be done before redirection.

And Is there is a way in PHP to redirect from page to page using.

BTW, I am using Javascript to solve this using(parent.location.href), But the problem is that Javascript doesnot work in some browsers..

In brief, I need a way to be redirected to the next page using PHP.

Please help me.

Anon

Because that's how the Web works. Headers come first, then the body. It is not a limitation of PHP. By definition, HTTP responses generally follow the format of RFC822, which specifies that headers are followed by a null line, then the body.

What is it that you're trying to do? It makes no sense to send a body when you are transmitting a redirect header, because in that case the body should not / would not be displayed.

Anon

One case is that in many situations, you are including some files at the top of the code, and many of these files may have some output. It is very hard to change those included files since they are included by many other files.

Another case (an output could be before redirection):

Some Output here.....

if ( button1_clicked ) // html button inside a form
{
header ("Location: do_process_1.php");
}
elseif ( button2_clicked ) // another html button
{
header ("Location: do_process_2.php");
}

I was wondering if there was anyway to get the redirects to work, even if there is an information being output?

Thx....

Anon

I've been looking for the same function myself. In ASP I use the function response.rederect "somepage.asp" to what you want to do. If ASP can, why cant php?
Mabye there can be done by a new function?

Anon

The right way to implement a redirect is to write your code so that conditional logic is processed and HTTP headers are sent BEFORE any HTML is output, and not after. If you are sending output before determining whether the user should see it, then there is a fundamental flaw in your program flow.

ASP's response.redirect doesn't do anything magical; it does EXACTLY the same thing as the PHP header() function. It sends a "Location:" header instructing the client to perform a new request. In order to process that instruction, the client must receive that header before it gets any HTML.

Regardless of what programming language you use, you can't transmit headers after content. Headers, by definition, must be transmitted at the top of an HTTP response.

ASP may be buffering and reorganizing the data before it is output, which may allow the programmer to get away with writing sloppy code, but sloppy is still sloppy. PHP also can buffer the output; see the documentation for the PHP ob_start() function.