Contact Form 7 - Mass Checkboxes displayed by line break separation within notification emails - email

Question

I have a question about the checkbox value items that I receive in my mail after someone fills in my contact form 7.
If someone has checked these three boxes in the form:
CHECKBOX1
CHECKBOX2
CHECKBOX3
Then in my mail they appear as:
CHECKBOX1, CHECKBOX2, CHECKBOX3
However, I would like to change the comma separation into line breaks.
Plus add a unique value for each checkbox so I can add in a URL:
Should be displayed in the email like this:
CHECKBOX1 – URL LINK
CHECKBOX2 – URL LINK
CHECKBOX3 – URL LINK
I really need this, can somebody please tell me where I can change this within contact form 7’s code?
Or does someone know another way without using contact form 7?

Answer 1

For HTML emails,
Edit: wp-content/plugins/contact-form-7/includes/classes.php
Look for function mail_callback. In my version it's at line 631.
Edit the function to be as so:
function mail_callback( $matches, $html = false ) {
if ( isset( $this->posted_data[$matches[1]] ) ) {
$submitted = $this->posted_data[$matches[1]];
if ( $html ) {
$replaced = strip_tags( $replaced );
$replaced = wptexturize( $replaced );
}
if ( is_array( $submitted ) )
$replaced = join( '<br/>', $submitted );
else
$replaced = $submitted;
$replaced = apply_filters( 'wpcf7_mail_tag_replaced', $replaced, $submitted );
return stripslashes( $replaced );
}
if ( $special = apply_filters( 'wpcf7_special_mail_tags', '', $matches[1] ) )
return $special;
return $matches[0];
}