1.What output will this code produce ?

<?php 
    class Disney
    {
        public $cartoon;

        function __construct($cartoon)
        {
            $this->cartoon = $cartoon;
        }
    }

    $disney = new Disney("The Beauty and The Beast");
    $waltDisney = $disney;
    $waltDisney->cartoon = "Pinocchio";
    echo $disney->cartoon;

"Pinocchio" because $waltDisney and $Disney are pointing to the same object

"The Beauty and The Beast" because the $cartoon property in the $waltDisney object was changed

NULL because the Disney class was not instanciated inside the $waltDisney variable

2.What is the output of the following script ?

  <?php
  function generate() {
      for ($i = 1; $i <= 3; $i++) 
          yield $i;
  }
  $generator = generate();
  if(is_array($generator))
    echo "Is Array";
  elseif(is_object($generator))
    echo "Is Object";
  else
    echo "Is none of the above";
  ?>

Is Array

Is Object

Is none of the above

3.What happens when the code below is executed ?

  <?php
    class foo
    {
      private $variable;

      function __construct()
      {
        $this->variable = 1;
      }

      function __get($name)
      {
        return $this->$name;
      }
    }
    $a = new foo;
    echo $a->variable;
  ?>

The script outputs 1

Fatal error: Cannot access private property foo::$variable

The script outputs 0

4.Considering the code below ...

  
    <?php 
        
    class AppException extends Exception
    {
      function __toString()
      {
        return "Your code has just thrown an exception: {$this->message}\n";
      }
    }

    class Students
    {
      public $first_name;
      public $last_name;

      public function __construct($first_name, $last_name)
      {
        if(empty($first_name))
        {
          throw new AppException('First Name is required', 1);
        }

        if(empty($last_name))
        {
          throw new AppException('Last Name is required', 2);
        }
      }
    }

    try {
     new Students('', ''); 
    } catch (Exception $e) {
      echo $e;
    }
  

... which of these statements are correct ?

The catch (Exception $e) statement is wrong because it accepts an instance of the Exception class as the parameter. It should use an instance of the AppException class instead.

The __toString() method can't be overwritten in a child class because the methods in the Exception class are all final but for the constructor

The magic __toString() method will be invoked automatically when the code enters the catch() statement and the custom exception message will be printed

5.Which of the statements about traits below are true ?

PHP is "single inheritance" so traits allow coders to reuse sets of methods from the trait freely in several independent classes

An inherited member from a base class is overridden by a member inserted by a Trait, but members from the current class override Trait methods.

If two Traits insert a method with the same name in a class that uses them, a fatal error is produced and this naming conflict can not be bypassed

6.When running PHP's built in FastCGI Process Manager (FPM) which of the following statements are true ?

Settings initialized in the php-fpm.conf file with php_admin_flag can not be overwritten in the code through ini_set()

It doesn't provide any easy way of debugging slow performing requests/scripts

The special fastcgi_finish_request() function allows PHP to finish request and flush all data while continuing to do various tasks in the background.

7.Which of th following statements about object serialization are true ?

After serializing an object, a programmer can fully recreate that object in another file by calling unserialize() even if the class definition doesn't exist.

Static class properties can be serialized, but can not be unserialized.

Static class properties can not be serialized.

8.Which of the following functions will sort an array in ascending order by value, while preserving key associations?

asort()

usort()

krsort()

ksort()

sort()

9.Which function would you use to add an element to the beginning of an array?

array_shift()

array_push()

$array[0] = "value";

array_unshift()

array_pop()

10.Which key will not be displayed from the following code block? $array = array('a' => 'John', 'b' => 'Coggeshall', 'c' => array('d' => 'John', 'e' => 'Smith')); function display($item, $key) { print "$key => $item\n"; } array_walk_recursive($array, "display");

d

c

b

a

They all will be displayed

11.Given the following array: $array = array(1,1,2,3,4,4,5,6,6,6,6,3,2,2,2); The fastest way to determine the total number a particular value appears in the array is to use which function?

array_total_values

array_count_values

A foreach loop

count

a for loop

12.Which of the following tags are an acceptable way to begin a PHP Code block?

<SCRIPT LANGUAGE="php">

<!

<%

<?

13.What is the output of the following PHP script? $a = 1; $b = 2.5; $c = 0xFF; $d = $b + $c; $e = $d * $b; $f = ($d + $e) % $a; print ($f + $e);

643.75

432

643

257

432.75

14.In PHP 5 you can use the ______ operator to ensure that an object is of a particular type. You can also use _______ in the function declaration.

instanceof, is_a

instanceof, type-hinting

type, instanceof

===, type-hinting

===, is_a

15.What is wrong with the following code? function duplicate($obj) { $newObj = $obj; return $newObj; } $a = new MyClass(); $a_copy = duplicate($a); $a->setValue(10); $a_copy->setValue(20);

You must use return &$newObj instead

There is nothing wrong with this code

duplicate() must accept its parameter by reference

You must use the clone operator to make a copy of an object

duplicate() must return a reference

16.What is the primary difference between a method declared as static and a normal method?

Static methods can only be called using the :: syntax and never from an instance

Static methods do not provide a reference to $this

Static methods cannot be called from within class instances

Static methods don't have access to the self keyword

There is no functional difference between a static and non-static method

17.The ______ keyword is used to indicate an incomplete class or method, which must be further extended and/or implemented in order to be used.

final

protected

incomplete

abstract

implements

18.Type-hinting and the instanceof keyword can be used to check what types of things about variables?

If a particular child class extends from it

If they are an instance of a particular interface

If they are an abstract class

If they have a particular parent class

If they are an instance of a particular class

19.When an object is serialized, which method will be called, automatically, providing your object with an opportunity to close any resources or otherwise prepare to be serialized?

__destroy()

__serialize()

__destruct()

__shutdown()

__sleep()

20.Which php.ini directive should be disabled to prevent the execution of a remote PHP script via an include or require construct?

You cannot disable remote PHP script execution

curl.enabled

allow_remote_url

allow_url_fopen

allow_require

21.Consider the following code: session_start(); if(!empty($_REQUEST['id']) && !empty($_REQUEST['quantity'])) { $id = scrub_id($_REQUEST['id']); $quantity = scrub_quantity($_REQUEST['quantity']) $_SESSION['cart'][] = array('id' => $id, 'quantity' => $quantity) } /* .... */ What potential security hole would this code snippet produce?

Cross-Site Scripting Attack

There is no security hole in this code

Code Injection

SQL Injection

Cross-Site Request Forgery

22.Which of the following are not valid ways to embed a variable into a string?

$a = "Value: $value->getValue()";

$a = "Value: {$value}";

$a = 'Value: $value';

$a = "Value: $value";

$a = "Value: {$value['val']}";

23.Which function is best suited for removing markup tags from a string?

strip_markup

strip_tags

str_replace

preg_replace

preg_strip

24.Consider the following script: $oranges = 10; $apples = 5; $string = "I have %d apples and %d oranges"; ??????? What could be placed in place of ?????? to output the string: "I have 5 apples and 10 oranges"

str_format($string, $apples, $oranges);

print($string, $apples, $oranges);

printf($string, $apples, $oranges);

print sprintf($apples, $oranges);

sprintf($string, $oranges, $apples);

25.Which PCRE regular expression will match the string PhP5-rocks

/^[hp1-5]*\-.*/i

/[hp1-5]*\-.?/

/[hp][1-5]*\-.*/

/[PhP]{3}[1-5]{2,3}\-.*$/

/[a-z1-5\-]*/

26.To destroy one variable within a PHP session you should use which method in PHP 5?

Unset the variable in $HTTP_SESSION_VARS

Use the session_destroy() function

Use the session_unset() function

unset the variable in $_SESSION using unset()

Any of the above are acceptable in PHP 5

27.If you would like to change the session ID generation function, which of the following is the best approach for PHP 5?

Set the session.hash_function INI configuration directive

Use the session_set_id_generator() function

Set the session id by force using the session_id() function

Use the session_regenerate_id() function

Implement a custom session handler

28.When uploading a file using HTTP, which variable can be used to locate the file on PHP's local filesystem?

$_FILES['fieldname']['tmp_name']

$_FILES['fieldname']

$_FILES['fieldname'][0]['filename']

$_FILES['fieldname']['filename']

None of the above

29.Consider the following function: function redirect($url) { // Check to make sure we haven't already sent // the header: if(/*???????*/) { header("Location: $url"); } } What conditional should replace the ????? above?

!in_array("Location: $url", headers_list())

!header_exists("Location: $url")

!header_location($url)

$_SERVER['HTTP_LOCATION'] != $url

30.One can ensure that headers can always be sent from a PHP script by doing what?

Enable header buffering in PHP 5

Set the header.force INI directive to true

Enable output buffering in PHP 5

There is no way to ensure that headers can always be set, they must always be checked

None of the above