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  1. POsession_start() doesn't work online
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    <p>I'm having a problem to set a session for a user. it's working in my localhost but online it doesn't work. </p> <p>I have a username called 's' and I have created a page to see what is the problem</p> <p>here is the code. test.php</p> <pre><code>&lt;?php session_start(); require 'connect.php'; $username = @$_POST['username']; ?&gt; &lt;div class="center_body"&gt; &lt;div class="search_field"&gt; &lt;form method="POST" action="&lt;?php echo $_SERVER['PHP_SELF']; ?&gt;"&gt; &lt;table border="0" width="100%" cellspacing="0" cellpadding="0"&gt; &lt;td align="left"&gt;username:&lt;/td&gt; &lt;td align="right"&gt;&lt;input type="text" name="username" class="search" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;input type="submit" value="log in" class="search" /&gt;&lt;/p&gt; &lt;/form&gt; &lt;/tr&gt; &lt;/div&gt; &lt;/div&gt; &lt;?php $result = mysql_query("SELECT username FROM users WHERE username='$username'") or die(mysql_error); while($row = mysql_fetch_assoc($result)) { $user = $row['username']; } if($username == $user) { echo '&lt;div class="search_field"&gt;&lt;b&gt;you have logged successfully&lt;/b&gt;&lt;/div&gt;&lt;/ br&gt;'; $_SESSION['username'] = $username; } if(isset($_SESSION['username'])) { echo $_SESSION['username']; } ?&gt; </code></pre> <p>like above code, it works, and also I can print the username. but when I edit the test.php to be</p> <pre><code>&lt;?php session_start(); require 'connect.php'; if(isset($_SESSION['username'])) { echo $_SESSION['username']; } ?&gt; </code></pre> <p>now, this page should print username because I have successfully created the session. but it prints nothing so session seems not working</p> <p>what do you thing is the problem?</p> <p>EDIT: connect.php</p> <pre><code>&lt;?php $connect = @mysql_connect("localhost","root","") or die("error in connection"); $select = @mysql_select_db("abc") or die ("no databse selected"); ?&gt; </code></pre> <p>of course I changed data to be connected to my host databas</p>
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