Consider the following code. Which keyword should be used in the line marked with "KEYWORD" instead of "self" to make this code work as intended?
abstract class Base {
protected function __construct() {
}
public static function create() {
return new self(); // KEYWORD
}
abstract function action();
}
class Item extends Base {
public function action() { echo __CLASS__; }
}
$item = Item::create();
$item->action(); // outputs "Item"
How can you determine whether a PHP script has already sent cookies to the client?
What is the return value of the following code: substr_compare("foobar", "bar", 3);
What does the __FILE__ constant contain?
What is "instanceof" an example of?
What is the output of the following code?
class a
{
public $val;
}
function renderVal (a $a)
{
if ($a) {
echo $a->val;
}
}
renderVal (null);
Consider the following table data and PHP code. What is the outcome?
Table data (table name "users" with primary key "id"):
id name email
------- ----------- -------------------
1 anna alpha@example.com
2 betty beta@example.org
3 clara gamma@example.net
5 sue sigma@example.info
PHP code (assume the PDO connection is correctly established):
$dsn = 'mysql:host=localhost;dbname=exam';
$user = 'username';
$pass = '********';
$pdo = new PDO($dsn, $user, $pass);
try {
$cmd = "INSERT INTO users (id, name, email) VALUES (:id, :name, :email)";
$stmt = $pdo->prepare($cmd);
$stmt->bindValue('id', 1);
$stmt->bindValue('name', 'anna');
$stmt->bindValue('email', 'alpha@example.com');
$stmt->execute();
echo "Success!";
} catch (PDOException $e) {
echo "Failure!";
throw $e;
}
What is the name of the function that allows you register a set of functions that implement user-defined session handling?
An HTML form contains this form element:
When this form is submitted, the following PHP code gets executed:
move_uploaded_file(
$_FILES['myFile']['tmp_name'],
'uploads/' . $_FILES['myFile']['name']
);
Which of the following actions must be taken before this code may go into production? (Choose 2)
An HTML form has two submit buttons. After submitting the form, how can you determine with PHP which button was clicked?
