I'm trying to implement captcha validation for a contact form. I'm getting the following error for every textbox:
`>Notice Undefined index: name in contact1.php on line 16
Notice Undefined index: name in contact1.php on line 21
Notice Undefined index: name in contact1.php on line 26
Notice Undefined index: name in contact1.php on line 41`
contact.php:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>PHP Contact Form with Captcha</title>
</head>
<body>
<form action="mailer.php" method="post" name="form1" id="form1" style="margin:0px; font- family:Verdana, Arial, Helvetica, sans-serif;font-size:11px; width:300px;" onsubmit="MM_validateForm('from','','RisEmail','subject','','R','verif_box','','R','message' ,'','R');return document.MM_returnValue">
Your Name:<br />
<input name="name" type="text" id="name" style="padding:2px; border:1px solid #CCCCCC; width:180px; height:14px; font-family:Verdana, Arial, Helvetica, sans-serif;font-size:11px;" value="<?php echo $_GET['name'];?>"/>
<br />
<br />
Your e-mail:<br />
<input name="from" type="text" id="from" style="padding:2px; border:1px solid #CCCCCC; width:180px; height:14px; font-family:Verdana, Arial, Helvetica, sans-serif;font-size:11px;" value="<?php echo $_GET['from'];?>"/>
<br />
<br />
Subject:<br />
<input name="subject" type="text" id="subject" style="padding:2px; border:1px solid #CCCCCC; width:180px; height:14px;font-family:Verdana, Arial, Helvetica, sans-serif; font- size:11px;" value="<?php echo $_GET['subject'];?>"/>
<br />
<br />
Type verification image:<br />
<input name="verif_box" type="text" id="verif_box" style="padding:2px; border:1px solid #CCCCCC; width:180px; height:14px;font-family:Verdana, Arial, Helvetica, sans-serif; font- size:11px;"/>
<img src="verificationimage.php?<?php echo rand(0,9999);?>" alt="verification image, type it in the box" width="50" height="24" align="absbottom" /><br />
<br />
<!-- if the variable "wrong_code" is sent from previous page then display the error field -->
<?php if(isset($_GET['wrong_code'])){?>
<div style="border:1px solid #990000; background-color:#D70000; color:#FFFFFF; padding:4px; padding-left:6px;width:295px;">Wrong verification code</div><br />
<?php ;}?>
Message:<br />
<textarea name="message" cols="6" rows="5" id="message" style="padding:2px; border:1px solid #CCCCCC; width:300px; height:100px; font-family:Verdana, Arial, Helvetica, sans-serif; font-size:11px;"><?php echo $_GET['message'];?></textarea>
<noscript><a href="http://www.thewebhelp.com" style="display:none;">contact form by thewebhelp</a></noscript>
<input name="Submit" type="submit" style="margin-top:10px; display:block; border:1px solid #000000; width:100px; height:20px;font-family:Verdana, Arial, Helvetica, sans-serif; font-size:11px; padding-left:2px; padding-right:2px; padding-top:0px; padding-bottom:2px; line-height:14px; background-color:#EFEFEF;" value="Send Message"/>
</form>
</body>
</html>
verificationimage.php
<?php
header('Content-type: image/jpeg');
$width = 50;
$height = 24;
$my_image = imagecreatetruecolor($width, $height);
imagefill($my_image, 0, 0, 0xFFFFFF);
// add noise
for ($c = 0; $c < 40; $c++){
$x = rand(0,$width-1);
$y = rand(0,$height-1);
imagesetpixel($my_image, $x, $y, 0x000000);
}
$x = rand(1,10);
$y = rand(1,10);
$rand_string = rand(1000,9999);
imagestring($my_image, 5, $x, $y, $rand_string, 0x000000);
setcookie('tntcon',(md5($rand_string).'a4xn'));
imagejpeg($my_image);
imagedestroy($my_image);
?>
mailer.php
enter code here
<?php
$name = $_REQUEST["name"];
$subject = $_REQUEST["subject"];
$message = $_REQUEST["message"];
$from = $_REQUEST["from"];
$verif_box = $_REQUEST["verif_box"];
$name = stripslashes($name);
$message = stripslashes($message);
$subject = stripslashes($subject);
$from = stripslashes($from);
if(md5($verif_box).'a4xn' == $_COOKIE['tntcon']){
$message = "Name: ".$name."
".$message;
$message = "From: ".$from."
".$message;
mail("adriantadeo14@rocketmail.com", 'Online Form: '.$subject, $_SERVER['REMOTE_ADDR']."
".$message, "From: $from");
setcookie('tntcon','');
} else {
header("Location:".$_SERVER['HTTP_REFERER']."? subject=$subject&from=$from&message=$message&wrong_code=true");
exit;
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>PHP Contact Form Redirect</title>
</head>
<body>
</body>
</html>
How can I fix this issue?
