Backslash in PHP — what does it mean?

Question

I just saw the use of a backslash in a reference to a PHP object and was curious about it (I have never seen this before). What does it mean?

$mail = new Sen         


        

Answer 1

This is syntax for namespaces. You can read more about namespaces at PHP documentation. They they require at least PHP 5.3.

For example:

namespace SendGrid;
function Mail() {
    // You can access this function by using SendGrid\Mail() externally
}