Hacking "Contact Form 7" code to Add A "Referred By" field - php

Question

I've got about 6 subdomains that have a "contact us" link and I'm sending all these links to a single form that uses "Contact Form 7". I add ?from=site-name to each of the links so that I can set a $referredFrom variable in the contact form.
The only two things I'm missing are (1) the ability to insert this referredFrom variable into the email that I get whenever someone submits the form and (2) The ability to redirect the user back to the site they came from (stored in $referredFrom)
Any ideas?
Here's a bit of code from includes/classes.php that I thought might be part of the email insert but its not doing much...
function mail() {
global $referrer;
$refferedfrom = $referrer; //HERE IS MY CUSTOM CODE
$fes = $this->form_scan_shortcode();
foreach ( $fes as $fe ) {
$name = $fe['name'];
$pipes = $fe['pipes'];
if ( empty( $name ) )
continue;
$value = $_POST[$name];
if ( WPCF7_USE_PIPE && is_a( $pipes, 'WPCF7_Pipes' ) && ! $pipes->zero() ) {
if ( is_array( $value) ) {
$new_value = array();
foreach ( $value as $v ) {
$new_value[] = $pipes->do_pipe( $v );
}
$value = $new_value;
} else {
$value = $pipes->do_pipe( $value );
}
}
$this->posted_data[$name] = $value;
$this->posted_data[$refferedfrom] = $referrer; //HERE IS MY CUSTOM CODE
}
I'm also thinking that I could insert the referredFrom code somewhere in this function as well...
function compose_and_send_mail( $mail_template ) {
$regex = '/\[\s*([a-zA-Z][0-9a-zA-Z:._-]*)\s*\]/';
$callback = array( &$this, 'mail_callback' );
$mail_subject = preg_replace_callback( $regex, $callback, $mail_template['subject'] );
$mail_sender = preg_replace_callback( $regex, $callback, $mail_template['sender'] );
$mail_body = preg_replace_callback( $regex, $callback, $mail_template['body'] );
$mail_recipient = preg_replace_callback( $regex, $callback, $mail_template['recipient'] );
$mail_headers = "From: $mail_sender\n";
if ( $mail_template['use_html'] )
$mail_headers .= "Content-Type: text/html\n";
$mail_additional_headers = preg_replace_callback( $regex, $callback,
$mail_template['additional_headers'] );
$mail_headers .= trim( $mail_additional_headers ) . "\n";
if ( $this->uploaded_files ) {
$for_this_mail = array();
foreach ( $this->uploaded_files as $name => $path ) {
if ( false === strpos( $mail_template['attachments'], "[${name}]" ) )
continue;
$for_this_mail[] = $path;
}
return #wp_mail( $mail_recipient, $mail_subject, $mail_body, $mail_headers,
$for_this_mail );
} else {
return #wp_mail( $mail_recipient, $mail_subject, $mail_body, $mail_headers );
}
}

Answer 1

I'd found a plugin that works fantastic for doing this, plus a little more:
http://wordpress.org/plugins/contact-form-7-leads-tracking/
Which will add all the information to the end of your email when it is sent

Answer 2

First of all, in order to get the from variable you'll have to insert
$referrer = $_GET['from'];
somewhere in the top script, at least before the last line you inserted.
Additionally, in the second script you have to add the value to $mail_body somehow, but since I don't know how that value is made up I can't help much with that.
Is the code for this form available online somewhere?

Answer 3

Insert in your functions.php or create a simple plugin...
1.
function custom_wpcf7_special_mail_tag( $output, $name ) {
if ( 'from' == $name ) {
$referredFrom = ( isset($_GET["from"]) && !empty($_GET["from"]) ) ? $_GET["from"] : '';
$output = $referredFrom;
}
return $output;
}
add_filter( 'wpcf7_special_mail_tags', 'custom_wpcf7_special_mail_tag', 10, 2 );
Use the [from] tag in your email template.
2.
function add_custom_js_cf7() {
$referredFrom = ( isset($_GET["from"]) && !empty($_GET["from"]) ) ? $_GET["from"] : '';
if ( $referredFrom ) {
?>
<script type="text/javascript">
var from = "<?php echo $referredFrom; ?>";
</script>
<?php }
}
add_action( 'wpcf7_enqueue_scripts', 'add_custom_js_cf7' );
And add this line to the "additional settings" in your form settings:
on_sent_ok: "location = from;"
http://contactform7.com/blog/2010/03/27/redirecting-to-another-url-after-submissions/
You can also use global $referredFrom; if you declared it somewhere.