Need to set form to post only selected variables

[lsargent]

I'm working on a form submit template for consumer feedback for a customer's website. The issue I'm having is that all the variable options are being carried through and posted in the email, and I only want the selected checkboxes or fields that contain input text to show up on the back end. HTML form code and PHP command code are included below:

 

HTML Form Code:

<form method="POST" action="customer-feedback.php">

<p>How did you hear about us?
<p><input type="checkbox" name="Event">  Event (which one): <input type="text" name="Which_Event" size="30">
<p><input type="checkbox" name="Website">  Website (which one): <input type="text" name="Which_Website" size="30">
<p><input type="checkbox" name="Search_Engine">  Search Engine
<p><input type="checkbox" name="Word_of_Mouth">  Word of Mouth
<br>
<p>What type of racing interests you?  (check all that apply)
<p><input type="checkbox" name="IndyCar">  IndyCar
<p><input type="checkbox" name="Formula_One">  Formula One
<p><input type="checkbox" name="Sprint_Midgets">  Sprint, Midgets
<p><input type="checkbox" name="Nascar">  NASCAR
<p><input type="checkbox" name="Other">  Other (which kind): <input type="text" name="Which_Kind" size="30">
<p><input type="checkbox" name="Like_All">  I like all auto racing
<p><input type="checkbox" name="Like_None">  I am not an auto racing fan
<p><input type="submit" name="submit" value="Submit">

</form>

 

PHP Code from (customer-feedback.php)

<?php
// Website Contact Form Generator 
// http://www.tele-pro.co.uk/scripts/contact_form/ 
// Get posted data into local variables
$EmailTo = "[email protected]";
$Communication = "Customer Feedback";
$Event = Trim(stripslashes($_POST['Event'])); 
$Which_Event = Trim(stripslashes($_POST['Which_Event'])); 
$Website = Trim(stripslashes($_POST['Website'])); 
$Which_Website = Trim(stripslashes($_POST['Which_Website'])); 
$Search_Engine = Trim(stripslashes($_POST['Search_Engine'])); 
$Word_of_Mouth = Trim(stripslashes($_POST['Word_of_Mouth'])); 
$IndyCar = Trim(stripslashes($_POST['IndyCar'])); 
$Formula_One = Trim(stripslashes($_POST['Formula_One'])); 
$Sprint_Midgets = Trim(stripslashes($_POST['Sprint_Midgets'])); 
$Nascar = Trim(stripslashes($_POST['Nascar'])); 
$Other = Trim(stripslashes($_POST['Other'])); 
$Which_Kind = Trim(stripslashes($_POST['Which_Kind'])); 
$Like_All = Trim(stripslashes($_POST['Like_All'])); 
$Like_None = Trim(stripslashes($_POST['Like_None'])); 
// validation
$validationOK=true;
if (!$validationOK) {
  print "<meta http-equiv=\"refresh\" content=\"0;URL=error.htm\">";
  exit;
}
// prepare email body text
$Body = "";
$Body .= "Discovered via: Event";
$Body .= $Event;
$Body .= "\n";
$Body .= "Which Event: ";
$Body .= $Which_Event;
$Body .= "\n";
$Body .= "Discovered via: Website";
$Body .= $Website;
$Body .= "\n";
$Body .= "Which Website: ";
$Body .= $Which_Website;
$Body .= "\n";
$Body .= "Discovered via: Search Engine";
$Body .= $Search_Engine;
$Body .= "\n";
$Body .= "Discovered via: Word of Mouth";
$Body .= $Word_of_Mouth;
$Body .= "\n";
$Body .= "Fan of: IndyCar";
$Body .= $IndyCar;
$Body .= "\n";
$Body .= "Fan of: Formula One";
$Body .= $Formula_One;
$Body .= "\n";
$Body .= "Fan of: Sprint, Midgets";
$Body .= $Sprint_Midgets;
$Body .= "\n";
$Body .= "Fan of: NASCAR";
$Body .= $Nascar;
$Body .= "\n";
$Body .= "Fan of: Other";
$Body .= $Other;
$Body .= "\n";
$Body .= "Which Kind: ";
$Body .= $Which_Kind;
$Body .= "\n";
$Body .= "I like all auto racing";
$Body .= $Like_All;
$Body .= "\n";
$Body .= "I am not an auto racing fan";
$Body .= $Like_None;
$Body .= "\n";
// send email 
$success = mail($EmailTo, $Communication, $Body, "From: <[email protected]>");
// redirect to success page 
if ($success){
  print "<meta http-equiv=\"refresh\" content=\"0;URL=index.html\">";
}
else{
  print "<meta http-equiv=\"refresh\" content=\"0;URL=error.htm\">";
}
?> 

 

Thanks

[gizmola]

What do you expect, you use every variable in the $Body string without checking to see if any of them exist.  Checkboxes will exist in the $_POST if checked, otherwise they will not exist.  As almost all of the variables are checkboxes, there's no reason to be doing a trim(stripslashes) on them.  For those all you would need is:

 

$IndyCar = isset($_POST['IndyCar']);

// Later on

if ($IndyCar) {
  $Body .= "Fan of: IndyCar\n";
}

 

 

[lsargent]

Thanks. I don't know much about php and used this template originally for a contact form in which all variables were required. I didn't know on my end what needed to be edited.

[gizmola]

Sure, however, the way checkboxes work is an html thing, not a php thing.  With that said, this is a pretty common question.