Usbforwindows
The “Cannot Modify Header Information – Headers Already Sent By” error indicates that a . php file cannot execute because an output is being sent before calling an HTTP header. Headers always need to precede the output.
The “Cannot Modify Header Information – Headers Already Sent By” error indicates that a . php file cannot execute because an output is being sent before calling an HTTP header. Headers always need to precede the output.
![Add sync-able bookings calendar to the site [closed]](https://usbforwindows.com/storage/img/images_1/add_syncable_bookings_calendar_to_the_site_closed.png)
