Which of the following are valid identifiers? (Choose 3)
What super-global should be used to access information about uploaded files via a POST request?
What is the difference between "print" and "echo"?
What is the output of the following code?echo "1" + 2 * "0x02";
What is the result of the following bitwise operation in PHP?1 ^ 2
What is the output of the following code?echo '1' . (print '2') + 3;
