Dotan Cohen

Thank you, in fact the argument about having to check for the existence of each query var is strong enough to discourage the idea already. As you mention, many or most of the use cases can already be handled with extant hooks, albeit a bit more involved but doable.

Thank you.

I see, thank you.

Here is a list of all CF7 hooks in the most current version (4.3.1):

$ grep -r do_action *
admin/includes/admin-functions.php:	do_action( 'wpcf7_save_contact_form', $contact_form );
admin/edit-contact-form.php:<?php do_action( 'wpcf7_admin_notices' ); ?>
admin/edit-contact-form.php:<form method="post" action="<?php echo esc_url( add_query_arg( array( 'post' => $post_id ), menu_page_url( 'wpcf7', false ) ) ); ?>" id="wpcf7-admin-form-element"<?php do_action( 'wpcf7_post_edit_form_tag' ); ?>>
admin/edit-contact-form.php:	do_action( 'wpcf7_admin_footer', $post );
admin/admin.php:	do_action( 'wpcf7_admin_init' );
admin/admin.php:<?php do_action( 'wpcf7_admin_notices' ); ?>
admin/admin.php:<?php do_action( 'wpcf7_admin_notices' ); ?>
admin/admin.php:<?php do_action( 'wpcf7_admin_notices' ); ?>
includes/contact-form.php:		do_action( 'wpcf7_contact_form', $this );
includes/contact-form.php:		do_action( 'wpcf7_submit', $this, $result );
includes/contact-form.php:				do_action( 'wpcf7_after_create', $this );
includes/contact-form.php:				do_action( 'wpcf7_after_update', $this );
includes/contact-form.php:			do_action( 'wpcf7_after_save', $this );
includes/controller.php:	do_action( 'wpcf7_enqueue_scripts' );
includes/controller.php:	do_action( 'wpcf7_enqueue_styles' );
includes/submission.php:			do_action( 'wpcf7_mail_sent', $contact_form );
includes/submission.php:			do_action( 'wpcf7_mail_failed', $contact_form );
includes/submission.php:		do_action( 'wpcf7_before_send_mail', $contact_form );
settings.php:	do_action( 'wpcf7_init' );
settings.php:	do_action( 'wpcf7_upgrade', $new_ver, $old_ver );