session_start problem

[m118]

I get an error message on the web page.

 

Warning:  session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at D:\AppServ\www\mission1\m.php:1) in D:\AppServ\www\mission1\m.php on line 1

 

I have put the session_start code on the top of the program, but it is not working. Please tell me how to fix it. Thank you very much.

 

 

<?php session_start();

 

if(isset($_SESSION['myusername']))

{

  print "Your session username: ".$_SESSION['myusername']. "<br>";

  print "Your session password: ".$_SESSION['mypassword']."<br>";

}

else

{

  print "Session does not exist";

}

 

?>

 

 

[AyKay47]

the error states that your output was started on line 1, so I am assuming that there is white space before your opening <?php tag

[m118]

This is the print screem of  the program. I did not find the problem.

 

[attachment deleted by admin]

[AyKay47]

just to be sure I would write it like this

 

<?php
session_start();

if(isset($_SESSION['myusername']))
{
  print "Your session username: ".$_SESSION['myusername']. "<br>";
  print "Your session password: ".$_SESSION['mypassword']."<br>";
}
else
{
  print "Session does not exist";
}

?>

[Pikachu2000]

If you have nothing at all (including spaces, tabs, empty lines, etc.) before the opening <?php tag, chances are you have a byte order mark in the file. Make sure your editor is set up to save files as UTF-8 without BOM.

[AbraCadaver]

http://www.phpfreaks.com/forums/index.php?topic=37442.msg1385483#msg1385483

[AyKay47]

If you have nothing at all (including spaces, tabs, empty lines, etc.) before the opening <?php tag, chances are you have a byte order mark in the file. Make sure your editor is set up to save files as UTF-8 without BOM.

learned something new right there, thanks Pikachu

[m118]

how to set up to save files as UTF-8 without BOM ? I try to display chinese word.

[AyKay47]

it's normally located in the editors preferences, and is also sometimes called identification bytes