Cannot modify header information

This question already has an answer here:

How to fix “Headers already sent” error in PHP 11 answers

Reference - What does this error mean in PHP? 30 answers

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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 :-)

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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' ) ;

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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

链接地址: http://www.djcxy.com/p/69394.html

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