Function Call:

total_contacts_opened_day

Purpose:

Returns a total count of all contacts who have  opened any HTML email where the pixel tracking image has read, in date order.  Optionally (but recommended) between specified dates. (Consider a cron job to capture this daily and store the result somewhere else to plot change)

Parameters:

date_start
date_end

format: YYYY-MM-DD

Return:

For each day

date
opens

-count of clicks on trackable links.

status – if error

Example:

http://example.com/a.php/api/total_contacts_opened_day?api_key=0c68398f&date_start=2018-07-31&date_end=2018-10-30