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kab_184
09-14-2006, 12:28 PM
I have a script which i use for contact purpose.

The form has a Text input field "boxed" in which the visitor must enter "6B38" .

Once the visitor enters this code and hits submit button the whole form is POSTed to another PHP page containing a Emailing Script in PHP.

Now i want to add a Check at the begining of that emailing script SUCH that

if boxed = 6B38
then execute email script

else redirect user to the FORM page again.

What will be exact code to do this?



Here is the email script i want to condition
<?php
# You can use this script to submit your forms or to receive orders by email.
$MailToAddress = "you@site.com"; // your email address
$redirectURL = "http://www.web4future.com/thankyou.htm"; // the URL of the thank you page.
$MailSubject = "[Message from the contact form]"; // the subject of the email
$sendHTML = FALSE; //set to "false" to receive Plain TEXT e-mail
$serverCheck = TRUE; // if, for some reason you can't send e-mails, set this to "false"

# copyright 2006 Web4Future.com =================== READ THIS ===================================================

# If you are asking for a name and an email address in your form, you can name the input fields "name" and "email".
# If you do this, the message will apear to come from that email address and you can simply click the reply button to answer it.

# To block an IP, simply add it to the blockip.txt text file.
# CHMOD 777 the blockip.txt file (run "CHMOD 777 blockip.txt", without the double quotes)
# This is needed because the script tries to block the IP that tried to hack it

# If you have a multiple selection box or multiple checkboxes, you MUST name the multiple list box or checkbox as "name[]" instead of just "name"
# you must also add "multiple" at the end of the tag like this: <select name="myselectname[]" multiple>
# you have to do the same with checkboxes

/*****************************************************************

Web4Future Easiest Form2Mail (GPL).
Copyright (C) 1998-2006 Web4Future.com All Rights Reserved.
http://www.Web4Future.com/
This script was written by George L. & Calin S. from Web4Future.com

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

*****************************************************************/

# DO NOT EDIT BELOW THIS LINE UNLESS YOU KNOW WHAT YOU ARE DOING ===================================================
$w4fver = "2.2";
$ip = ($_SERVER['HTTP_X_FORWARDED_FOR'] == "" ? $_SERVER['REMOTE_ADDR'] : $_SERVER['HTTP_X_FORWARDED_FOR']);
//function blockIP
function blockip($ip) {
$handle = @fopen("blockip.txt", 'a');
@fwrite($handle, $ip."\n");
@fclose($handle);
}
$w4fx = stristr(file_get_contents('blockip.txt'),getenv('REMOTE_ADDR'));
if ($serverCheck) {
if (preg_match ("/".str_replace("www.", "", $_SERVER["SERVER_NAME"])."/i", $_SERVER["HTTP_REFERER"])) { $w4fy = TRUE; } else { $w4fy = FALSE; }
} else { $w4fy = TRUE; }
if (($w4fy === TRUE) && ($w4fx === FALSE)) {
$w4fMessage = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\"><html>\n<head><meta http-equiv=\"Content-Type\" content=\"text/html; charset=iso-8859-1\"></head><body><font face=3Dverdana size=3D2>";
if (count($_GET) >0) {
reset($_GET);
while(list($key, $val) = each($_GET)) {
$GLOBALS[$key] = $val;
if (is_array($val)) {
$w4fMessage .= "<b>$key:</b> ";
foreach ($val as $vala) {
$vala =stripslashes($vala);
$vala = htmlspecialchars($vala);
if (trim($vala)) { if (stristr($vala,"Content-Type:") || stristr($vala,"MIME-Version") || stristr($vala,"Content-Transfer-Encoding") || stristr($vala,"bcc:")) { blockip($ip); die("ILLEGAL EXECUTION DETECTED!"); } }
$w4fMessage .= "$vala, ";
}
$w4fMessage .= "<br>\n";
}
else {
$val = stripslashes($val);
if (trim($val)) { if (stristr($val,"Content-Type:") || stristr($val,"MIME-Version") || stristr($val,"Content-Transfer-Encoding") || stristr($val,"bcc:")) { blockip($ip); die("ILLEGAL EXECUTION DETECTED!"); } }
if (($key == "Submit") || ($key == "submit")) { }
else { if ($val == "") { $w4fMessage .= "$key: - <br>\n"; }
else { $w4fMessage .= "<b>$key:</b> $val<br>\n"; }
}
}
} // end while
}//end if
else {
reset($_POST);
while(list($key, $val) = each($_POST)) {
$GLOBALS[$key] = $val;
if (is_array($val)) {
$w4fMessage .= "<b>$key:</b> ";
foreach ($val as $vala) {
$vala =stripslashes($vala);
$vala = htmlspecialchars($vala);
if (trim($vala)) { if (stristr($vala,"Content-Type:") || stristr($vala,"MIME-Version") || stristr($vala,"Content-Transfer-Encoding") || stristr($vala,"bcc:")) {blockip($ip); die("ILLEGAL EXECUTION DETECTED!"); } }
$w4fMessage .= "$vala, ";
}
$w4fMessage .= "<br>\n";
}
else {
$val = stripslashes($val);
if (trim($val)) { if (stristr($val,"Content-Type:") || stristr($val,"MIME-Version") || stristr($val,"Content-Transfer-Encoding") || stristr($val,"bcc:")) {blockip($ip); die("ILLEGAL EXECUTION DETECTED!"); } }
if (($key == "Submit") || ($key == "submit")) { }
else { if ($val == "") { $w4fMessage .= "$key: - <br>\n"; }
else { $w4fMessage .= "<b>$key:</b> $val<br>\n"; }
}
}
} // end while
}//end else
$w4fMessage .= "<font size=3D1><br><br>\n Sender IP: ".$ip."</font></font></body></html>";
$w4f_what = array("/To:/i", "/Cc:/i", "/Bcc:/i","/Content-Type:/i","/\n/");
$name = preg_replace($w4f_what, "", $name);
$email = preg_replace($w4f_what, "", $email);
if (!$email) {$email = $MailToAddress;}
$mailHeader = "From: $name <$email>\r\n";
$mailHeader .= "Reply-To: $name <$email>\r\n";
$mailHeader .= "Message-ID: <". md5(rand()."".time()) ."@". ereg_replace("www.","",$_SERVER["SERVER_NAME"]) .">\r\n";
$mailHeader .= "MIME-Version: 1.0\r\n";
if ($sendHTML) {
$mailHeader .= "Content-Type: multipart/alternative;";
$mailHeader .= " boundary=\"----=_NextPart_000_000E_01C5256B.0AEFE730\"\r\n";
}
$mailHeader .= "X-Priority: 3\r\n";
$mailHeader .= "X-Mailer: PHP/" . phpversion()."\r\n";
$mailHeader .= "X-MimeOLE: Produced By Web4Future Easiest Form2Mail $w4fver\r\n";
if ($sendHTML) {
$mailMessage = "This is a multi-part message in MIME format.\r\n\r\n";
$mailMessage .= "------=_NextPart_000_000E_01C5256B.0AEFE730\r\n";
$mailMessage .= "Content-Type: text/plain; charset=\"ISO-8859-1\"\r\nContent-Transfer-Encoding: quoted-printable\r\n\r\n";
$mailMessage .= trim(strip_tags($w4fMessage))."\r\n\r\n";
$mailMessage .= "------=_NextPart_000_000E_01C5256B.0AEFE730\r\n";
$mailMessage .= "Content-Type: text/html; charset=\"ISO-8859-1\"\r\nContent-Transfer-Encoding: quoted-printable\r\n\r\n";
$mailMessage .= "$w4fMessage\r\n\r\n";
$mailMessage .= "------=_NextPart_000_000E_01C5256B.0AEFE730--\r\n";
}
if ($sendHTML === FALSE) {
$mailHeader .= "Content-Type: text/plain; charset=\"ISO-8859-1\"\r\nContent-Transfer-Encoding: quoted-printable\r\n\r\n";
$mailMessage .= trim(strip_tags($w4fMessage))."\r\n\r\n";
}

if (!mail($MailToAddress, $MailSubject, $mailMessage,$mailHeader)) { echo "Error sending e-mail!";}
else { header("Location: ".$redirectURL); }
} else { echo "<center><font face=verdana size=3 color=red><b>ILLEGAL EXECUTION DETECTED!</b></font></center>";}
?>

raf
09-14-2006, 01:48 PM
just put

if ($_POST['boxed'] != '6B38'){
header('Location: yourform.php');
die();
}

at the top of the email-script. (and replace yourform.php with the actual filename of that form of course ...)

kab_184
09-14-2006, 02:00 PM
Thanks thats was better...more simpler and better than CAPTCHA

raf
09-15-2006, 07:52 AM
Thanks thats was better...more simpler and better than CAPTCHA:confused:
Checking if a certain field has some value will not prevent automated formsubmissions.
captcha's enable you to seperate humans from machines, which is not possible with your setup. so this check will not hold back any spammers.
as for simplicity --> there are plenty of easy to implement captcha classes out there. if you run a quick google or a search here, then plenty of readymade code will popup.