If one wants to convert all double quotes (") to a backslash followed by a double quote (\") which of the following can be used?

The comparison $a xor $b evaluates to...

How to determine whether the variable’s value is either TRUE or FALSE?

Which PHP function will return an array of values from $start to $end.

$_SERVER, $_COOKIE, $_FILES, $_ENV are examples of PHP built-in variables called:

Which of the following will return TRUE?

What super-global should be used to access information about uploaded files via a POST request?

The extent to which proximate procedures are related to one another is known as

Correct way to profile a PHP function (without relying on 3rd party libraries and/or PHP extensions)?

Which statement is correct?

Which is incorrect about empty()?