Send an Email and Download a PDF on click of Contact Form 7 Submit button - wordpress

Question

I have a contact form in my Wordpress website. In that I have three fields Name, Email and Mobile, and a button called Submit. When the user fills all the fields and click on Submit button an email should send which can possible with Contact From 7 plugin.
But challenge here is I need to make the user download a PDF also, when he clicks on Submit button upon filling all the fields.'
How can I achieve this in Wordpress?

Answer 1

You can use the wpcf7_mail_sent hook provided by Contact form 7 like this:
add_action('wpcf7_mail_sent', function ($cf) {
// Run code after the email has been sent
});
This link: https://contactform7.com/2017/06/07/on-sent-ok-is-deprecated/ also describes another way:
add_action( 'wp_footer', 'mycustom_wp_footer' );
function mycustom_wp_footer()
{ ?>
<script type="text/javascript">
document.addEventListener( 'wpcf7mailsent', function( event )
{
//Write a javascript code to download the file.
} , false );
</script>
<?php
}

Answer 2

Since the on_sent_ok has been deprecated, here is an example you could use as inspiration.
I had the similar need to add a download CTA after the content of all case studies of a website, but "in exchange" of user's data for:
display a CF7 form on your page, I had the same one on all case studies post type single which I hooked after the content
find a way to get the wanted PDF url for people to download, as for me all case studies have a different PDF, I simply added an ACF field, filtered on PDF only, which returns the file url
based on CF7 Dom events, choose the action you prefer to make the dowload happens, as I am not sending any confirmation email, I prefer working on the wpcf7submit event. Note that wpcf7submit event is fired only if the form has been validated
So the code looks like this:
<?php
// For simplicity, using an anonymous functions
add_action( 'wp_print_footer_scripts', function () {
// Check the wanted singular post type loading
if ( is_admin() || ! is_singular( 'case-study' ) ) {
return;
}
// Check if the ACF PDF field is not empty for use
$pdf_link = get_field( 'pdf' );
if ( empty( $pdf_link ) ) {
return;
}
// Hook on the "wpcf7submit" CF7 Dom event to force the download
printf( "<script>document.addEventListener( 'wpcf7submit', function( event ) { window.open('%s'); }, false );</script>", $pdf_link );
} );