1.Considering the code below, which of these statements are true?

<?php 
    ini_set("allow_url_fopen", "1");
    $page = file_get_contents("http://www.codepunker.com");
    if($page!=FALSE)
    echo "Successfully fetched website contents";
    else
    echo "An error has occurred";

The correct setting for loading web pages from a script is "allow_url_include"

The "allow_url_fopen" option can not be changed through ini_set. It can only be set in php.ini for security reasons

The if statement should be "if($page!==FALSE)" because "file_get_contents" can return non boolean values which evaluate to false

2.What happens when you run the following MySQL Query ?

  
  CREATE TABLE PRIMARY (ID int);
  

Syntax Error - PRIMARY is reserved in MySQL and should be quoted to be used as a table name

Syntax Error - PRIMARY is reserved in MySQL and can not be used as a table name

A table called PRIMARY containing a column called ID is created

3.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

4.What is the output of the code below ?

    
    $now  = new DateTime();
    $now2 = new DateTime();

    $ago  = new DateInterval('P4Y10M3W');
    $ago2 = new DateInterval('P4Y10M2W7D');

    $then  = $now->sub($ago);
    $date1 = $then->format('Y-m-d');

    $then2 = $now2->sub($ago2);
    $date2 = $then2->format('Y-m-d');

    var_dump ($date1 === $date2);
    

bool(false) - because the '2W' part in $ago2 will get overwritten by the '7D' part and therefor the second date interval will be 2 Weeks shorter than the first interval.

bool(true) - because the two interval definitions are equivalent.

bool(false) and the script will throw a notice because the date/time interval notation in the $ago2 variable is wrong.

5.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.

6.What happens if you execute the code below ?

<?php
    class someclass
    {
        public $someprop;
        
        function __construct()
        {
            $this->someprop = 1;
        }
    }

    function somefunc(&$instance) {
        unset($instance);
    }

    $instance = new someclass;
    somefunc($instance);
    var_dump($instance);

NULL

object(someclass)#1 (1) { ["someprop"]=> int(1) }

Warning (Only variables can be passed by refence) NULL

7.What is the output of the following PHP script?

                    <?php 
                        $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

8.How do you access standard I/O and error streams ?

Use stdin(), stdout() and stderr() functions

PHP::STDIN, PHP::STDOUT and PHP::STDERR class constants

Use PHP::stdin(), PHP::stdout() and PHP::stderr() class functions

STDIN, STDOUT and STDERR constants

9.Which from the following list is not an appropriate use of an array?

As a list

All of these uses are valid

As a Lookup Table

A Stack

As a hash table

10.What is the output of the following PHP code? define("FOO", 10); $array = [10 => FOO,"FOO" => 20]; print $array[$array[FOO]] * $array["FOO"];

FOO

100

200

20

10

11.Which technique should be used to speed up joins without changing their results?

Add an index on joined columns

Add a WHERE clause

Add a LIMIT clause

Use an inner join

12.What is the best way to ensure that a user-defined function is always passed an object as its single parameter?

function myfunction(stdClass $a)

function myfunction($a = stdClass)

Use is_object() within the function

There is no way to ensure the parameter will be an object.

function myfunction(Object $a)

13.What does the following function do, when passed two integer values for $p and $q? function magic($p, $q) { return ($q == 0) ? $p: magic($q, $p % $q); }

Loops infinitely.

Switches the values of $p and $q.

Determines if they are both even or odd?

Determines the greatest common divisor between them.

Calculates the modulus between the two.

14.What would go in place of ?????? below to make this script execute without a fatal error? $a = 1; $b = 0; /* ?????? */ $c = $a / $b;

quit();

die();

stop();

__halt_compiler();

exit();

15.What is the output of the following function? function &find_variable(&$one, &$two, &$three) { if($one > 10 && $one < 20) return $one; if($two > 10 && $two < 20) return $two; if($three > 10 && $three < 20) return $three; } $one = 2; $two = 20; $three = 15; $var = &find_variable($one, $two, $three); $var++; print "1: $one, 2: $two, 3: $three";

1: 2, 2: 20, 3: 15

1: 3, 2: 21, 3: 16

1: 2, 2: 21, 3: 15

1: 3, 2: 20, 3: 15

1: 2, 2: 20, 3: 16

16.How does one access standard input/output and error streams in PHP 5?

STDIN, STDOUT and STDERR constants

Use stdin(), stdout() and stderr() functions

PHP::STDIN, PHP::STDOUT and PHP::STDERR class constants

Use PHP::stdin(), PHP::stdout() and PHP::stderr() class functions

17.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

18.How can you modify the copy of an object during a clone operation?

Put the logic in the object's constructor to alter the values

Implment your own function to do object copying

Implement the object's __clone() method

Implement __get() and __set() methods with the correct logic

Implement the __copy() method with the correct logic

19.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

20.The _______ method will be called automatically when an object is represented as a string.

getString()

__get()

__value()

__toString()

__getString()

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.What is the best measure one can take to prevent a cross-site request forgery?

Disallow requests from outside hosts

Add a secret token to all form submissions

Turn off allow_url_fopen in php.ini

Filter all output

Filter all input

23.When comparing two strings, which of the following is acceptable?

$a === $b;

strcasecmp($a, $b);

strcmp($a, $b);

$a == $b;

str_compare($a, $b);

24.A fingerprint of a string can be determined using which of the following?

md5()

hash()

fingerprint()

None of the above

25.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

26.If you would like to store your session in the database, you would do which of the following?

It requires a custom PHP extension to change the session handler

Implement the session_set_save_handler() function

Create functions for each session handling step and use session_set_save_handler() to override PHP's internal settings

Configure the session.save_handler INI directive to your session class

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.Consider the following HTML fragment: <select name="???????" multiple> <option value="1">Item #1</option> <!-- ... more options ... --> </select> Which of the following name attributes should be used to capture all of the data from the user in PHP?

myselectbox=array()

myselectbox[]

myselectbox['multiple']

myselectbox{'multiple'}

myselectbox

29.To force a user to redirect to a new URL from within a PHP 5 script, which of the following should be used?

Send a HTTP "Location:" header

Use the HTML <redirect> Tag

Send a HTTP "Forward:" header

Use the redirect() function

30.Setting a HTTP cookie on the client which is not URL-encoded is done how in PHP 5?

Use the setrawcookie() function

Set the cookies.urlencode INI directive to false

Use urldecode() on the return value of setcookie()

Setting the $no_encode parameter of setcookie() to a boolean 'true'

All cookies must be URL encoded