PHP Interview Questions and answers

In the above question the interviewer is expecting the logic behind the scene (Recursive). Actually he may directly ask you to write a recursive function to calculate N to the power of N, or given number to the power of N. Following is the simplest way that you can write a PHP recursive function for this functionality.

function MyPow($r, $w){
 if($w==0)
  return 1;
 else
  return MyPow($r, $w-1) * $r;
}

echo MyPow(10, 2);

Also this functionality substitutes by the pow() function in PHP.

E_DEPRECATED

The E_DEPRECATED error level is used to indicate that a function or feature has been deprecated.

E_USER_DEPRECATED

The E_USER_DEPRECATED level is intended for indicating deprecated features in user code, similarly to the E_USER_ERROR and E_USER_WARNING levels.