Do variables have to be declared ? I am trying to make a logout script as part of my communication component, but I keep getting a message about the variable being undefinded. IF I declare it as something, it always comes back as being already logged out. It also does it if I put file.php?user="a name"
<?
include ("style.php");
include ("mysql.php");
//-----------------Logout script
if($user)
{
$query="update users set status=\"no\" where username=\"$user\"";
$result=mysql_query($query, $link);
$query="delete from chatdata where sender like '%$user%'or buddy like '%$user%'";
mysql_query($query, $link);
print"<center><body bgcolor=\"000066\"><span style=background-color:8080C0><font color=lightblue> $user you have logged out </span>";
exit;
}
//-----------------------------Login form
echo"Php Instant Messenger Login";
echo"<form name=\"log\" action=\"login.php\">";
echo"<input type=\"text\" name=\"username\" maxlength=\"20\"> Username <br>";
echo"<br><input type=\"password\" name=\"password\" maxlength=\"20\"> Password <br><br> ";
echo"<input type=\"submit\" value=\"Login\">";
echo"<input type=\"hidden\" name=\"login\"value=\"log\">";
echo" New Users Click<a href='register.php'><b> Here</b></a><br><br>";
echo"</form>";
echo"<div align='justify'>This is a Php Instant Messenger, it does not use an IRC layer, Java, Active-X or any
platform dependant plugin control.The drop down list on your interface provides you other users online.</div>";
?>
Notice: Undefined variable: user in folder\index.php on line 8
Php Instant Messenger Login
is the message that appears a top when I try to open the page.
