// ---------------- CF7 EMAIL CONFIRM

add_filter( 'wpcf7_validate_email*', 'custom_email_confirmation_validation_filter', 20, 2 );

function custom_email_confirmation_validation_filter( $result, $tag ) {
if ( 'your-email-confirm' == $tag->name ) {
$your_email = isset( $_POST['your-email'] ) ? trim( $_POST['your-email'] ) : '';
$your_email_confirm = isset( $_POST['your-email-confirm'] ) ? trim( $_POST['your-email-confirm'] ) : '';

if ( $your_email != $your_email_confirm ) {
$result->invalidate( $tag, "Les adresses email doivent correspondre" );
}
}

return $result;
}