php error cannot modify header information

How to solve the problem that PHP cannot modify the header information. In actual use, for example, the following PHP error message cannot be modified: Warning: Cannotmodifyheaderinformation-headersalreadysentby we have just started to write PHP

In actual use For example, the following PHP cannot modify the header information Error warning: Warning:cannot Modify header Information-headers already sent by We've probably had this problem when we started writing PHP programs. From the literal

When using PHP, there are times when you may encounter some errors, how are these errors generated? And how do we solve these problems? This requires that we have a certain grasp of the language of PHP. Let me talk about how to solve the problem

In actual use For example, the following PHP error warning cannot modify the header information: Warning: Cannot modify header information-headers already sent We may have encountered this problem when we were writing PHP programs. Literally, it

From: http://zhanglulu33.blog.163.com/blog/static/112799542010112810497281/ If you got this message: "Warning: cannot modify header information-headers already sent ...."If you see this warning when executing the PHP program: "Warning: cannot modify

This article describes the PHP hints cannot modify header Information-headers already sent by solution, is the PHP design process often encountered problems. In this paper, an example is used to analyze the solution. Share to everyone for your

Warning: cannot modify header information-headers already sent by error causeI added the header of the PHP program,Header ("cache-control: No-cache, must-revalidate ");The above error is displayed on the page, and N documents are not returned. Today,

Summary, the ultimate approach: Modify the php.ini file, the output_buffering default is off, change to 4096. !--? phpob_start (); Setcookie ("username", "Song Yan Bin", Time () +3600); Echo "The username is:". $HTTP _cookie_vars["username"]. " \

Ob_start (); Setcookie ("username", "Song Yan Bin", Time () +3600); echo "The username is:". $HTTP _cookie_vars["username"]. " \ n "; echo "The username is:". $_cookie["username"]. " \ n "; Print_r ($_cookie); ?> Warning:cannot Modify header

Ob_start (); Setcookie ("username", "Song Yan Bin", Time () +3600); echo "The username is:". $HTTP _cookie_vars["username"]. " \ n "; echo "The username is:". $_cookie["username"]. " \ n "; Print_r ($_cookie); ?> Warning:cannot Modify header