200-530 Practice Questions

One common security risk is exposing error messages directly in the browser. Which PHP configuration directive can be disabled to prevent this?

Which PHP function is used to validate whether the contents of $_FILES['name'] ['tem_name'] have really been uploaded via HTTP'?

Some databases support the LIMIT clause. ft is a method to ensure that

How many times will the function counter() be executed in the following code?

function counter($start, &$stop)

{

if ($stop > $start)

{

return;

} counter($start--, ++$stop);

}

$start = 5;

$stop = 2;

counter($start, $stop);

You analyze the code of a collegue and see, it uses the function strcasecmp. You try it out to see what it does and use the following function call:

strcasecmp('hello my dear!', 'Hello my DEAR!');

The function call returns "0". What does that mean?

What will be the value of $b after running the following code?

$a = array('c', 'b', 'a');

$b = (array)$a;

What is the output of the following code?

echo 0x33, ' monkeys sit on ', 011, ' trees.';

Given the following array:

$a = array(28, 15, 77, 43);

Which function will remove the value 28 from $a?

What is the output of the following script?

1

2 function fibonacci ($x1, $x2)

3 {

4 return $x1 + $x2;

5 }

6

7 $x1 = 0;

8 $x2 = 1;

9

10 for ($i = 0; $i < 10; $i++) {

11 echo fibonacci($x1, $x2) . ',';

12 }

13 ?>

Which is the most efficient way to determine if a key is present in an array, assuming the array has no NULL values?