IDT105 Recitation

Multiple Choice

What is the correct way to create an indexed array in PHP?

• array = ("apple", "banana");

• $array = array("apple", "banana");

• $array[] = ("apple", "banana");

• create_array("apple", "banana");

Multiple Choice

How do you access the second item in the following

array: $fruits = array("apple", "banana", "cherry");?

• fruits[1];

• $fruits[1];

• $fruits[2];

• $fruits{1};

Open Ended

Create a multidimensional array representing 3 users.

Each user must have a name, a nested array of 3 purchased products, and a nested associative array for their shipping address (city, province, zip)

Multiple Choice

Which of the following statements correctly sorts an associative array $a in descending order by value?

• asort($a);

• ksort($a);

• arsort($a);

• rsort($a);

Multiple Choice

What does array_keys(array("a" => 0, "b" => null, "c" => false), null, true) return?

• ["c"]

• []

• ["a", "b", "c"]

• ["b"]

Multiple Choice

Which method is more secure for transmitting sensitive form data?

• REQUEST

• GET

• POST

• C

Multiple Choice

What would $_REQUEST["name"] return if both GET and POST forms submitted a "name" field?

• An array with both values

• Depends on PHP configuration

• Always the GET value

• Always the POST value

Open Ended

Create a login form that uses htmlspecialchars() to prevent XSS and isset() to prevent undefined index errors.

Multiple Choice

Which function is best suited for validating an email address format?

• preg_match()

• isset()

• explode()

• strpos()

Multiple Choice

Which is false about $_COOKIE?

• It is set with setcookie()

• It can persist after the browser closes

• It is stored on the client machine

• It is encrypted by default

Multiple Choice

What is the output of this code?

$_GET["x"] = "<script>alert('x')</script>";

echo htmlspecialchars($_GET["x"]);

• Escapes HTML and executes script

• Prevents script execution

• Displays alert popup

• Echoes raw HTML

Open Ended

Explain the difference between $_POST, $_GET, and $_REQUEST. Provide examples when each is preferable.

Multiple Choice

What does this return?

$email = "[e-mail]";

if (filter_var($email, FILTER_VALIDATE_EMAIL)) echo "Valid";

else echo "Invalid";

• Error

• Nothing

• Valid

• Invalid