PHP Page redirect problem - Cannot modify header information [duplicate]

Answer 1

I have much easier solution for you - it is simple! Just add this command at the very start of the php source:

ob_start();

This will start buffering the output, so that nothing is really output until the PHP script ends (or until you flush the buffer manually) - and also no headers are sent until that time! So you don't need to reorganize your code, just add this line at the very beginning of your code and that's it :-)

Answer 2

No content should be sent to the browser before using php header() redirection. You can try javascript redirection instead if headers already sent.

if( mysql_num_rows( $qselect ) === 0 )
{
   echo "<script type='text/javascript'>window.location.href='{http://examplesite.domain/errorpage}'</script>";
   exit;
}

But I am not sure javascript redirects are search engine friendly

Answer 3

before sending any thing to view (text in the browser). check if your model that if id is valid or not . if id is not valid redirect to your error page

header("HTTP/1.1 301 Moved Permanently");
header( 'Location: http://examplesite.domain/errorpage' ) ;