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 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.When working with unfamiliar code, what is the best way to find out in which file a class is defined ?

Using ReflectionClass:

  <?php
  $reflection = new ReflectionClass('ClassName');
  echo $reflection->getFileName();
  ?>

Using the grep command to search through the application files:

  <?php
  $out = array();
  exec("grep -r 'Classname' .", $out);
  var_dump($out);
  ?>

Using the get_declared_classes() function:

  $classes = get_declared_classes();
  var_dump($classes);

4.What is the output of the code below ?

  
    <?php
    namespace animals;

    ini_set('error_reporting', E_ALL);
    ini_set('display_errors', 'on');

    class Cat
    {
      static function Definition()
      {
        return 'Cats are ' . __NAMESPACE__;
      }
    }

    namespace animals\pets;

    class Cat
    {
      static function Definition()
      {
        return 'Cats are ' . __NAMESPACE__;
      }
    }

    echo Cat::Definition();    
  

Cats are animals\pets

Fatal error: Cannot redeclare class Cat

Fatal error: Cannot re-declare class animals\pets\Cat in sub-namespace

5.How does Opcode Cache improve performance in PHP 5.5+ ?

Opcode Cache stores objects in memory so that they can be accessed directly by other processes.

Opcode Cache stores database query results thus eliminating the need of executing those queries again

OPcache stores precompiled script bytecode in memory, thus removing the need to load and parse scripts on each request.

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.Which of the following is not valid syntax for creating a new array key?

$a[] = "value";

$a{} = "value";

$a[0] = "value";

$a{0} = "value";

$a[$b = 0] = "value";

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.What is the output of this code snippet? $a = array(0.001 => 'b', .1 => 'c'); var_dump($a);

An empty array

0.001 => 'b', .1 => c

0 => 'c'

'0.001' => 'b', '0.1' => c'

A Syntax Error

10.If you wanted a variable containing the letters A through Z, that allowed you to access each letter independently, which of the following approaches could you use?

$str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';

range('A', 'Z');

explode("", "ABCDEFGHIJKLMNOPQRSTUVWXYZ");

You would use the ALPHA_ARRAY constant

None of the above

11.What should go in the missing line ????? below to produce the output shown? $array_one = array(1,2,3,4,5); $array_two = array('A', 'B', 'C', 'D', 'E'); ??????? print_r($array_three); Result: Array ( [5] => A [4] => B [3] => C [2] => D [1] => E )

$array_three = array_merge(array_reverse($array_one), $array_two);

$array_three = array_combine($array_one, $array_two);

$array_three = array_combine(array_reverse($array_one), $array_two);

$array_three = array_merge($array_one, $array_two);

$array_three = array_reverse($array_one) + $array_two;

12.Which of the following functions are used with the internal array pointer to accomplish an action?

key

forward

prev

current

next

13.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

14.The ____ construct is particularly useful to assign your own variable names to values within an array.

array_get_variables

current

each

import_variables

list

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

<SCRIPT LANGUAGE="php">

<!

<%

<?

16.Given a PHP value, which sample shows how to convert the value to JSON?

$string = json_encode($value);

$string = Json::encode($value);

$json = new Json($value); $string = $json->__toString();

$value = (object) $value; $string = $value->__toJson();

17.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)

18.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();

19.What is the difference between the ``include`` and ``require`` language constructs?

Require constructs can't be used with URL filenames

Include constructs cause a fatal error if the file doesn't exist

There is no difference other than the name

Include constructs are processed at run time; require constructs are processed at compile time

Require constructs cause a fatal error if the file can't be read

20.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

21.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

22.What are the three access modifiers that you can use in PHP objects?

protected

public

static

private

final

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

getString()

__get()

__value()

__toString()

__getString()

24. Which of the following list of potential data sources should be considered trusted?

$_ENV

$_GET

$__COOKIE

$_SERVER

None of the above

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

$a === $b;

strcasecmp($a, $b);

strcmp($a, $b);

$a == $b;

str_compare($a, $b);

26.Identify the best approach to compare two variables in a binary-safe fashion

Both strcmp() and $a === $b

$a == $b

$a === $b

str_compare()

strstr()

27.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

28.Setting a cookie on the client in PHP 5 can be best accomplished by:

Use the add_cookie() function

Use the setcookie() function

Use the the apache_send_header() function

Setting a variable in the $_COOKIE superglobal

29.How does one create a cookie which will exist only until the browser session is terminated?

You cannot create cookies that expire when the browser session is terminated

Setting the expiration time for a cookie to a time in the distant future

Do not provide a cookie expiration time

Enable Cookie Security

Set a cookie without a domain

30.During an HTTP authentication, how does one determine the username and password provided by the browser?

Parse the HTTP headers manually using http_get_headers()

Use the get_http_username() and get_http_password() functions

Use the $_SERVER['HTTP_USER'] and $_SERVER['HTTP_PASSWORD'] variables

Use the $_SERVER['PHP_AUTH_USER'] and $_SERVER['PHP_AUTH_PW'] variables

Parse the $_SERVER['REQUEST_URI'] variable