Need help with redirection

joe_tseng

I'm trying to create a file I call verify.php; it's going to verify the validity of a user's id input and redirect accordingly. This is a portion of what I have:

<? session_start() ?>

<?
if ($ses_iduser) {
header ("Location: welcome.php");
}
else {
header ("Location: login.php");
}
?>

And right now I'm getting:

"Warning: Cannot add header information - headers already sent..."

One of the things I really like about ASP is that you can buffer headers and I can't figure out how to do that with PHP. I went through the documentation for the "ob_..." functions and nothing is coming to me. Has anyone successfully coded this?

brandonschnell

fix your syntax errors and make sure headers are sent before anything else.

1) there is an empty line between the session_start() and the header() function. remove the empty line as the web server will send the text/html mime type before it sends the line return.

2) end all functions with a semicolon and include similiar php code in the same php tags.

<?
session_start();

if ($ses_iduser) {
header ("Location: welcome.php");
}
else {
header ("Location: login.php");
}
?>

vincentpeace

You should also be using session_is_registered('ses_iduser')

laurabrandt

Quote from PHP.net manual

"..header() function must be called before any actual output is sent, either by normal HTML tags blank lines in a file, or from PHP. It is a very common error to read code with include(), or require(), functions, or another file access function, and have spaces or empty lines that will output before header() is called."

For sample, check out http://www.php.net/manual/en/function.header.php

Blank lines before header() call is a definite no-no.

Laura Brandt

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