sending multiple headers (session_start() and setcookie() )

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  • Ben
    #1

    sending multiple headers (session_start() and setcookie() )

    Hi all,

    In my .php file, I'm using both session_start() and setcookie() before
    <html> tag. It gives me following warning message:

    Warning: Cannot modify header information - headers already sent by
    (output started at D:\Apache Group\Apache2\h tdocs\YC\songs. php:4) in
    D:\Apache Group\Apache2\h tdocs\YC\ycphpf unc.php on line 148

    My .php file looks like this:

    <?php session_start() ; ?>

    <?php
    ob_start();
    include 'ycphpfunc.php' ;
    $login = new login_class;
    if ($_POST[logusername] == "" || $_POST[logpassword] == "") {}
    else {
    $login->check_login($_ POST['logusername'], $_POST['logpassword'],
    $_POST['remember']);
    }
    ob_end_flush();
    ?>
    <html>
    ........
    ........
    </html>

    The call to check_login()ca lls setcookie() function through another
    function inside my "ycphpfunc. php" file.

    Can someone show me a way to include both session_start() and
    setcookie() before <html>?

    Thanks for your time!
    Ben
    Tags: None
    • Chris Hope
      #2
      Re: sending multiple headers (session_start( ) and setcookie() )

      Ben wrote:
      [color=blue]
      > In my .php file, I'm using both session_start() and setcookie() before
      > <html> tag. It gives me following warning message:
      >
      > Warning: Cannot modify header information - headers already sent by
      > (output started at D:\Apache Group\Apache2\h tdocs\YC\songs. php:4) in
      > D:\Apache Group\Apache2\h tdocs\YC\ycphpf unc.php on line 148
      >
      > My .php file looks like this:
      >
      > <?php session_start() ; ?>
      > [/color]

      It looks to me like there's white space (a line break) right here
      inbetween the closing ?> and opening <?php I'm not sure why you've
      coded it like this though. Why not just have one code block? See my
      example below.
      [color=blue]
      > <?php
      > ob_start();
      > include 'ycphpfunc.php' ;
      > $login = new login_class;
      > if ($_POST[logusername] == "" || $_POST[logpassword] == "") {}
      > else {
      > $login->check_login($_ POST['logusername'], $_POST['logpassword'],
      > $_POST['remember']);
      > }
      > ob_end_flush();
      > ?>
      > <html>
      > .......
      > .......
      > </html>
      >
      > The call to check_login()ca lls setcookie() function through another
      > function inside my "ycphpfunc. php" file.
      >
      > Can someone show me a way to include both session_start() and
      > setcookie() before <html>?[/color]

      Change it to be like this:

      <?php
      session_start() ;
              ob_start();
      ...


      or like this:

      <?php
              ob_start();
      session_start() ;
      ...

      --
      Chris Hope - The Electric Toolbox - http://www.electrictoolbox.com/

        Comment

        • Roy W. Andersen
          #3
          Re: sending multiple headers (session_start( ) and setcookie() )

          Ben wrote:
          [snip][color=blue]
          > Warning: Cannot modify header information - headers already sent by
          > (output started at D:\Apache Group\Apache2\h tdocs\YC\songs. php:4) in
          > D:\Apache Group\Apache2\h tdocs\YC\ycphpf unc.php on line 148[/color]
          [snip][color=blue]
          > include 'ycphpfunc.php' ;
          > $login = new login_class;
          > if ($_POST[logusername] == "" || $_POST[logpassword] == "") {}
          > else {
          > $login->check_login($_ POST['logusername'], $_POST['logpassword'],[/color]
          [snip]

          According to your error-message, the output is started at line 148 in
          your ycphpfunc.php file, which is included before you call your
          check_login method. The error isn't generated by session_start, but by
          setcookie().

          What does line 148 in ycphpfunc.php do? ;)


          Roy W. Andersen
          --
          ra at broadpark dot no / http://roy.netgoth.org/

          "Hey! What kind of party is this? There's no booze
          and only one hooker!" - Bender, Futurama

            Comment

            • crescent_au@yahoo.com
              #4
              Re: sending multiple headers (session_start( ) and setcookie() )


              Roy W. Andersen wrote:[color=blue]
              > Ben wrote:
              > [snip][color=green]
              > > Warning: Cannot modify header information - headers already sent by
              > > (output started at D:\Apache Group\Apache2\h tdocs\YC\songs. php:4)[/color][/color]
              in[color=blue][color=green]
              > > D:\Apache Group\Apache2\h tdocs\YC\ycphpf unc.php on line 148[/color]
              > [snip][color=green]
              > > include 'ycphpfunc.php' ;
              > > $login = new login_class;
              > > if ($_POST[logusername] == "" || $_POST[logpassword] == "") {}
              > > else {
              > > $login->check_login($_ POST['logusername'], $_POST['logpassword'],[/color]
              > [snip]
              >
              > According to your error-message, the output is started at line 148 in[/color]
              [color=blue]
              > your ycphpfunc.php file, which is included before you call your
              > check_login method. The error isn't generated by session_start, but[/color]
              by[color=blue]
              > setcookie().
              >[/color]
              just a reminder, the login_class class is also included inside
              ycphpfunc.php file.
              [color=blue]
              > What does line 148 in ycphpfunc.php do? ;)
              >[/color]
              line 148 in ycphpfunc.php has the following line:
              setcookie('reme mber',$cookie, time()+31104000 );
              [color=blue]
              >
              > Roy W. Andersen
              > --
              > ra at broadpark dot no / http://roy.netgoth.org/
              >
              > "Hey! What kind of party is this? There's no booze
              > and only one hooker!" - Bender, Futurama[/color]

                Comment

                • R. Rajesh Jeba Anbiah
                  #5
                  Re: sending multiple headers (session_start( ) and setcookie() )

                  Ben wrote:[color=blue]
                  > Hi all,
                  >
                  > In my .php file, I'm using both session_start() and setcookie()[/color]
                  before[color=blue]
                  > <html> tag. It gives me following warning message:
                  >
                  > Warning: Cannot modify header information - headers already sent by
                  > (output started at D:\Apache Group\Apache2\h tdocs\YC\songs. php:4) in
                  > D:\Apache Group\Apache2\h tdocs\YC\ycphpf unc.php on line 148
                  >
                  > My .php file looks like this:
                  >
                  > <?php session_start() ; ?>
                  >
                  > <?php
                  > ob_start();
                  > include 'ycphpfunc.php' ;
                  > $login = new login_class;
                  > if ($_POST[logusername] == "" || $_POST[logpassword] == "") {}
                  > else {
                  > $login->check_login($_ POST['logusername'], $_POST['logpassword'],
                  > $_POST['remember']);
                  > }
                  > ob_end_flush();
                  > ?>[/color]

                  1. Put everything under ob_start()
                  2. Send all headers (cookies/session/etc) before outputting

                  --
                  <?php echo 'Just another PHP saint'; ?>
                  Email: rrjanbiah-at-Y!com Blog: http://rajeshanbiah.blogspot.com/

                    Comment

                    • Mark
                      #6
                      Re: sending multiple headers (session_start( ) and setcookie() )

                      Ben wrote:
                      [color=blue]
                      >
                      > <?php session_start() ; ?>
                      >
                      > <?php
                      > ob_start();[/color]

                      That blank line is killing you. In fact, any carriage return characters
                      not INSIDE <?php and ?> characters will cause output to be sent by PHP
                      unless you are using output buffering (ob_start()).

                      That means included/required files too !!!!

                      It can be quite upsetting to track all those down, so just make sure that
                      ob_start() is absolulutely the first thing that happens in ANY php script
                      file ...


                      marc.




                      --
                      I am not an ANGRY man. Remove the rage from my email to reply.

                        Comment

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