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What is the output of the following code?

class Bar {
private $a = 'b';
public $c = 'd';
}
$x = (array) new Bar();

echo array_key_exists('a', $x) ? 'true' : 'false';
echo '-';
echo array_key_exists('c', $x) ? 'true' : 'false';

Which of the following functions will allow identifying unique values inside an array?

Which of the following parts must a XML document have in order to be well-formed?

FILL BLANK

What is the output of the following code?

function increment ($val)
{
$val = $val + 1;
}

$val = 1;

increment ($val);

echo $val;

What is the output of the following code?

echo "22" + "0.2", 23 . 1;

An object can be counted with count() and sizeof() if it...

What will be the output of the following code?

$a = array(0, 1, 2 => array(3, 4));
$a[3] = array(4, 5);
echo count($a, 1);

Given the following code, what will the output be:

trait MyTrait {
private $abc = 1;
public function increment() {
$this->abc++;
}
public function getValue() {
return $this->abc;
}
}
class MyClass {

use MyTrait;
public function incrementBy2() {
$this->increment();
$this->abc++;
}
}
$c = new MyClass;
$c->incrementBy2();
var_dump($c->getValue());

What would be the output of the following code?

namespace MyFramework\DB;

class MyClass {
static function myName() {
return __METHOD__;
}
}

print MyClass::myName();

Which of the following is correct? (Choose 2)

Which of these statements about PDO is NOT true?

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 [email protected]
2 betty [email protected]
3 clara [email protected]
5 sue [email protected]

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', '[email protected]');
$stmt->execute();
echo "Success!";
}
catch (PDOException $e) {
echo "Failure!";
throw $e;
}

Which of the following are NOT acceptable ways to create a secure password hash in PHP? (Choose 2)

In a shared hosting environment, session data can be read by PHP scripts written by any user.

How can you prevent this? (Choose 2)

FILL BLANK

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

Which of the following expressions will evaluate to a random value from an array below?

$array = array("Sue","Mary","John","Anna");

What is the output of the following code?

$a = 3;
switch ($a) {
case 1: echo 'one'; break;
case 2: echo 'two'; break;
default: echo 'four'; break;
case 3: echo 'three'; break;
}

In the following code, which line should be changed so it outputs the number 2:

class A {
protected $x = array(); /* A */

public function getX() { /* B */
return $this->x; /* C */
}
}

$a = new A(); /* D */
array_push($a->getX(), "one");
array_push($a->getX(), "two");
echo count($a->getX());

What is the output of the following code?

var_dump(boolval([]));

Which of the following statements is true?

Consider the following XML code:

<?xml version="1.0" encoding="utf-8"?>
<books>
<book id="1">PHP 5.5 in 42 Hours</book>
<book id="2">Learning PHP 5.5 The Hard Way</book>
</books>

Which of the following SimpleXML calls prints the name of the second book? (Let $xml =
simplexml_load_file("books.xml"); .) (Choose 2)

From your PHP application, how can you send the same header twice, but with different values?

The constructs for(), foreach(), and each() can all be used to iterate an object if the object...

Which class of HTTP status codes is used for redirections?

What is the output of the following code?

class a
{
public $val;
}

function renderVal (a $a)
{
if ($a) {
echo $a->val;
}
}

renderVal (null);

When a query that is supposed to affect rows is executed as part of a transaction, and reports no affected rows, it could mean that: (Choose 2)

What is the output of the following code?

for ($i = 0; $i < 1.02; $i += 0.17) {
$a[$i] = $i;
}
echo count($a);

Which one of the following XML declarations is NOT valid?

FILL BLANK

Which value will be assigned to the key 0 in this example?

$foo = array(true, '0' => false, false => true);

How can a SimpleXML object be converted to a DOM object?

Before the headers are sent, how can you remove a previously set header?

Which of the following statements is NOT true?

After performing the following operations:

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

What will be the value of $a?

What is the output of the following code?

var_dump(boolval(-1));