Excellent , thank so much , and I also want to ask why my browser warns this when I run page1.php at first time , whether I must make something in php.ini , I use IE6 , win2k , thank for your anwsering . Warning: Cannot send session cookie - headers already sent by (output started at C:\PHP\baitap\session.php:11) in C:\PHP\baitap\session.php on line 12 Warning: Cannot send session cache limiter - headers already sent (output started at C:\PHP\baitap\session.php:11) in C:\PHP\baitap\session.php on line 12 Notice: Undefined index: value in C:\PHP\baitap\session.php on line 13 1 Next page "J.Veenhuijsen" <info@solid-digital.nl> wrote in message 3F3A55F2.2060708@solid-digital.nl">news:3F3A55F2.2060708@solid-digital.nl... > Try this for page 2: > > <?php > session_start() ; > ?> > <form method="POST" action="page1.php"> > <?php > $value++ ; > echo $value ; > ?> > <br> > <input type="submit" value="Submit" name="B1"> > </form> > > In your version session_start() should be sent before any other output > is sent. > > Jochem > > > > Thomas Edward Lawrence wrote: > > this is page1.php > > <? > > session_start() ; > > echo $value ; > > if (!session_is_registered("value") ) > > { > > session_register("value") ; > > $value = 1 ; > > } > > echo $value ; > > ?> > > <br> > > <a href="page2.php">Next page</a> > > > > this is page2.php > > > > <form method="POST" action="page1.php"> > > <? > > session_start() ; > > $value++ ; > > echo $value ; > > ?> > > <br> > > <input type="submit" value="Submit" name="B1"> > > </form> > > > > when I come back to page1.php from page2.php , this is result : > > > > page1.php ( run at first time) > > > > Warning: Cannot send session cookie - headers already sent by (output started at C:\PHP\page1.php:9) in C:\PHP\\page1.php on line 10 > > > > Warning: Cannot send session cache limiter - headers already sent (output started at C:\PHP\page1.php:9) in C:\PHP\page1.php on line 10 > > > > Notice: Undefined variable: value in C:\PHP\page1.php on line 11 > > > > 1 (value of $value) > > > > Next page > > > > > > page2.php > > > > Warning: Cannot send session cache limiter - headers already sent (output started at C:\PHP\page2.php :10) in C:\PHP\page2.php on line 11 > > > > > > 2 (value of $value) > > > > > > > > > > page1.php ( when come back from page2.php) > > > > Warning: Cannot send session cookie - headers already sent by (output started at C:\PHP\page1.php :9) in C:\PHP\page1.php on line 10 > > > > Warning: Cannot send session cache limiter - headers already sent (output started at C:\PHP\page1.php:9) in C:\PHP\page1.php on line 10 > > > > Notice: Undefined variable: value in C:\PHP\page1.php on line 11 (browser not understanding $value) > > > > 1 (value of $value still 1) > > > > > > Next page > > > > > > > > Nothing changes , value of $value still is 1 , this question is so difficult , I also want to ask why my browser warns , how I must config in php.ini , I use IE6 , win2k , thank for reading . > -- PHP Windows Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
