How to add additional fields to contact form part of Cost Calculator?

If you like to add additional fields to contact form part of Cost Calculator, please do the following:

1. Open bt_cost_calculator.php file in the code editor.

2. Locate the following piece of code:

$output .= '<div class="btQuoteItem' . $m_message . ' btQuoteItemFullWidth"><textarea class="btContactMessage btContactField" placeholder="' . __( 'Message', 'bt-cost-calculator' ) . '"></textarea></div>';

and add above it the following:

$output .= '<div class="btQuoteItem"><input type="text" class="myText btContactField" placeholder="' . __( 'myText', 'bt-cost-calculator' ) . '"></div>';

This will create the new field in the form with the placeholder text myText. Change it according to your needs (edit placeholder="' . __( 'myText', 'bt_plugin' ) statement)

3. Locate the following piece of code in cc.main.js file:

'message' : c.find( '.btContactMessage' ).val()

and add above it the following:

'mytext' : c.find( '.myText' ).val(),

it will ensure that the value of the newly created field gets propagated to backend upon form submission

4. Locate the following piece of code in bt_cost_calculator.php file:

$message = $_POST['message'];

and add above it the following:

$mytext = $_POST['mytext'];

5. Locate the following piece of code in bt_cost_calculator.php file:

if ( $message != '' ) $message_to_admin .= '<div style="padding:.5em;"><b>' . __( 'Message', 'bt-cost-calculator' ) . '</b>: ' . stripslashes( $message ) . '</div>' . "\r\n";

and add above it the following:

if ( $mytext != '' ) $message_to_admin .= '<div style="padding:.5em;"><b>' . __( 'MyText', 'bt-cost-calculator' ) . '</b>: ' . $mytext . '</div>' . "\r\n";

It will include the value of your field into the email body.