Which of the following is the correct way to open the file "sample.txt" as read only?

Which is not related with respect to calculating the size of a file?

How do you start a session in PHP?

Correct keyword in SQL?

What is the output? try { $a = 10/0; echo $a; } catch (Exception $e) { echo 'You cannot divide by ZERO!!'; }

Output of the code? $a = 'b'; $b = 22; echo $$a + 40;

What does delete() function do?

Which is not a valid key type for arrays in PHP?

Which function displays a formatted string?

Difference between the include() and require() language constructs?

Which PHP function checks to see if a file exists and is writable?