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Old 12th October 15, 07:36 PM   #1
WLC Member
Join Date: May 2015
Posts: 6
Default Undefined variable error

I am trying to study code and learn. Problem is login system showing error

Notice: Undefined variable: username in C:\wamp\www\sumon\login.php on line 63

but it allows login.

code for index.php is given bellow:

<form action="login.php" method="post">
<table border=0 CellPadding=5 border="black" background="AquaLoop Wallpaper Bk.jpg" WIDTH=10% text="blue" ><center>
<table border=0 CellPadding=5 border="black" background="3438593196_e91fcc6316.jpg" WIDTH=10% text="blue" >

<tr font face ="Britannic Bold" border="0" color="Red" size="500" ALIGN="CENTER"> <TH COLSPAN=4> <fieldset> <p font size=0>LogIn Form</fieldset></TH>
<th bgcolor="" colspan=2 align="right"><img src="indicator.GIF" width="100" height="100" border="0"></th></TR>

<div align="center" style="color:#000000">
<td> Username : <input type="text" name="username" size="30"></td></tr>
Password :<input type="password" name="password" size="30"></td></tr>
<tr><td colspan="2">
<input name="submit" type="submit" value="Log In"> <a href="register.html"><b>Sign Up? </a></td> </tr> </div>
<!--<td&nbsp;&nbsp&nbsp;<a href="logInForm.php">Click here to Log-Out</a>&nbsp;&nbsp;&bull;&nbsp;&nbsp; </td>-->


now code for login.php is given bellow:



// connect to the mysql server
$link = mysql_connect($server, $db_user, $db_pass)
or die ("Could not connect to mysql because ".mysql_error());

// select the database
or die ("Could not select database because ".mysql_error());

$match = "select id from $table where username = '".$_POST['username']."'
and password = '".$_POST['password']."';";

$qry = mysql_query($match)
or die ("Could not match data because ".mysql_error());
$num_rows = mysql_num_rows($qry);

if ($num_rows <= 0) {

echo '<span style="color:#000000;text-align:center;"><b>Sorry, there is no username with the specified password.<br></span>';
echo "<a href=index.html><b>Try again</a>";
} else {
setcookie("loggedin", "TRUE", time()+(3600 * 24));
setcookie("mysite_username", "$username");

echo '<span style="color:#000000;text-align:center;"><b>You are now logged in!<br></span>';
echo '<p style="color: red; text-align: center">
<a href=home.php><b>continue...</a>


Where is the problem? I found on google that variable should be declared, how to solve? where to declare in this case?
software_ss is offline   Reply With Quote
Old 12th October 15, 08:00 PM   #2
WLC Member
Join Date: May 2015
Posts: 6
Default Re: Undefined variable error

Adding $username = $_POST['username']; just before line 63 -setcookie("mysite_username", "$username");
solved the error, but is this ok?
software_ss is offline   Reply With Quote

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