会话已经开始 - 忽略了for的session_start（）

hi i have a problem please help me

for($i=0;$i!=mysql_num_rows($result);$i++)
{
$play=mysql_result($result,$i);
session_start();
$_SESSION['$movie'] = $play;
?>
<a class="play" href="player.php"><?php print ($play).'</br></br>';}?></a>

where is my code is wrong ?

move session_start() before your for-cycle

session_start();

for($i=0;$i!=mysql_num_rows($result);$i++)
{
    $play=mysql_result($result,$i);
    $_SESSION['$movie'] = $play;
?>

<a class="play" href="player.php"><?php print ($play).'</br></br>';}?></a>

session_start();
for($i=0;$i!=mysql_num_rows($result);$i++){
    $play=mysql_result($result,$i);
    $_SESSION['$movie'] = $play;
    print( '<a class="play" href="player.php">' . $play . '</br></br></a>');
}
?>

You have an additional error where your open a tag is repeated, but your closing a tag is outside the for loop. Your $_SESSION['$movie'] variable is only going to have the final value of $play in it, too - meaning that it's pretty much a waste of processor time to set it over and over and over again.

pay attention to this : if your file Unicode is : UTF-8 or something like this , you'll see this error by PHP Set your Unicode to UTF-8 without BOM if you're going to write in other languages

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

Note the <?php instead of <? - this did the trick for me, when session_start() wasn't working.

Also, you wanna make sure your code is placed on top of the php document.

session_start must be mention on the top of your script and there should not put/write any code before it. like:

<?php
 session_start();
?>
// other stuff or page start here

----OR ----

You may check your page, in which you have already started session.