How to Customizing Email Templates, Subjects and add content dynamically?

This blog post aims to assist you in adding dynamic content to your Contact Form 7 email template and changing the email subject and message content during runtime.

We will follow the steps to resolve the issue.

1. We will use the contact form 7 standard filter “wpcf7_before_send_mail“.
2. Add your custom text to an email template. Make sure that text (Variable) is without any space. See attached screenshot for reference.

3. Modify the email body.

 
// get mail property
$mail = $contact_form->prop( 'mail' ); // returns array 
// add content to email body
$mail['body'] = str_replace( '[delivery_estimate_table]', $delivery_estimate, $mail['body'] ) ;

4. Modify the email body for email template 2. If you are using contact form 7 Mail(2) template. You can use following for it.

// get mail property
$mail2 = $contact_form->prop( 'mail_2' ); // returns array 
// add content to email body
$mail2['body'] = str_replace( '[delivery_estimate_table]', $delivery_estimate, $mail2['body'] ) ;

5. Modify the email subject.

$mail['subject'] = str_replace( '[quotation-id]', 'BDC-'.time(), $mail['subject'] );

Full source code.

// add the action 
add_action( 'wpcf7_before_send_mail', 'prefix_wpcf7_before_send_mail', 10, 3 );

function prefix_wpcf7_before_send_mail( $contact_form, &$abort, $submission ) { 

    $form_id      = $contact_form->id();
    if($form_id == 11 ){

        $delivery_estimate = '';

       
        $delivery_estimate .= '
            <table border="1" cellpadding="5" cellspacing="0" class="delivery-estimate-table">
            <thead>
                <tr>
                    <td>Product Name</td>
                    <td>Product Quantity</td>
                    <td>Product Price</td>
                    <td>Product Total Price</td>
                    <td>Delivery Postal Code</td>
                    <td>Delivery /hr Price</td> 
                    <td>Total Delivery Cost</td>
                    <td>Product & Delivery Total</td>
                </tr>
                </thead>
            <tbody>
            <tr>
                    <td>Testing Product Name</td>
                    <td>1</td>
                    <td>$100</td>
                    <td>$100</td>
                    <td>234 456</td>
                    <td>$10/hr</td> 
                    <td>$30</td>
                    <td>$130</td>
                </tr>
            </tbody></table>';

        $quotation_id = 'Test-12345';
        // get mail property
        $mail = $contact_form->prop( 'mail' ); // returns array 

        // add content to email body
        
        $mail['body'] = str_replace( '[delivery_estimate_table]', $delivery_estimate, $mail['body'] ) ;
        //$mail['body'] .= $values_str;
        $mail['body'] = str_replace( '[quotation-id]', 'BDC-'.time(),$mail['body'] );

        $mail['subject'] = str_replace( '[quotation-id]', 'BDC-'.time(), $mail['subject'] );
        
        // get mail property
        $mail2 = $contact_form->prop( 'mail_2' ); // returns array 

        // add content to email body
        
        $mail2['body'] = str_replace( '[delivery_estimate_table]', $delivery_estimate, $mail2['body'] ) ;
        
        //$mail['body'] .= $values_str;
        $mail2['body'] = str_replace( '[quotation-id]', 'BDC-'. $quotation_id ,$mail2['body'] );

        $mail2['subject'] = str_replace( '[quotation-id]', 'BDC-'. $quotation_id , $mail2['subject'] );
        

        // set mail property with changed value(s)
        $contact_form->set_properties( array( 'mail' => $mail, 'mail_2' => $mail2 ) );


        return $contact_form;

    }
}

Output of the code