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PHP
Q1. What does this code output?
echo 76 <=> '76 trombones';
Both sides of the "spaceship" are equal, so the answer is 0. PHP will convert '76 trombones' to 76
in this context, as the string starts with '76'. Try it! For php 8.0 and forward the answer is [x] -1,
for previous versions the answer is [x] 0. PHP 8 changed the way non-strict comparison between
numbers and non-numeric strings work.
Q2. Which is the most secure way to avoid storing a password in clear text in database?
Q3. What does this script do?
Q4. In the following script, which line(s) will cause an error(s)?
 1
 -1
 a parser error
 0
  $encrypted = shal($password);
  $encrypted = crypt($password, \$salt);
  $encrypted = md5($password);
  $encrypted = password_hash($password, PASSWORD_DEFAULT);
$email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL); 
if ($email === false) { 
 $emailErr = "Please re-enter valid email"; 
}
 It makes sure the email address is a good and functioning address
 It makes an email safe to input into a database
 It assigns an email to a variable and then removes all illegal characters from the $email variable
 It verifies that an email address is well formed.
1 <?php 
2 $count = 0;
3 $_xval = 5;
4 $_yval = 1.0; 
5 $some_string = "Hello there!"; 
6 $some_string = "How are you?"; 
7 $will i work = 6; 
8 $3blindmice = 3; 
9 ?>
https://www.php.net/manual/en/migration80.incompatible.php#migration80.incompatible.core.string-number-comparision
Q5. In a conditional statement, you want to execute the code only if both value are true. Which
comparison operator should you use?
Q6. All variables in PHP start with which symbol?
Q7. What is a key difference between GET and POST?
Q8. The ** operator is useful for sorting operations. It compares two values and returns an
integer less than, equal to, or greater than 0 depending on whether the value on the ** is less
than, equal to, or greater than the other.
Q9. Which are valid PHP error handling keywords?
 Line 6 will cause an error because you can't reassign a new value to a variable that has already
been set.
 Line 7 and 8 will cause an error. Line 7 has whitespace in $will i work and should be
$will_i_work. Line 8 cannot start with a number befcause it is a variable.
 Line 5 will cause an error because some_string should be someString.
 Line 3 and 4 will cause an error because a variable cannot start with an underscore(_).
 ||
 &
 <=>
 &&
 &
 %
 _
 $
 GET is used with the HTTP protocol. POST is used with HTTPS.
 GET displays the submitted data as part of the URL. During POST, this information is not
shown, as it's encoded in the request body.
 GET is intended for changing the server state and it carries more data than POST.
 GET is more secure than POST and should be used for sensitive information.
 greater-than; right
 spaceship; left
 equality; right
 comparison; left
 try, throw, catch, callable
 try, yield, catch, finally
 yield, throw, catch, finally
 try, throw, catch, finally
Q10. Which value equates to true?
Q11. What is missing from this code, which is supposed to create a test cookies?
Q12. What is the value of $total in this calculation?
$total = 2 + 5 * 20 - 6 / 3
Q13. What is the purpose of adding a lowercase "u" as a modifier after the final delimiter in a
Perl-compatible regular expression?
Q14. Which code snippet uses the correct syntax for creating an instance of the Pet class?
Q15. What is the best way to explain what this script does?
 0
 NULL
 ''
 -1
1 $string_name = "testcookie"; 
2 $string_value = "This is a test cookie";
3 $expiry_info = info()+259200; 
4 $string_domain = "localhost.localdomain";
 The  $_REQUEST  is missing.
 The  $_COOKIES  array is missing.
 The cookie session is missing.
 The call to  setcookie()  is missing.
 44
 138
 126
 100
 It makes the dot metacharacter match anything, including newline characters.
 It makes the pattern match uppercase letters.
 Both the pattern and subject string are treated as UTF-8.
 It inverts the greediness of the quantifiers in the pattern so they are not greedy by default.
  $dog = new Pet;
 all of these answers
  $horse = (new Pet);
  $cat = new Pet();
Q16. Which is the correct format for adding a comment to a PHP script?
Q17. PHP supports multiple types of loops. If you wanted to loop through a block of code if and
as long a specified condition is true, which type of loop would you use?
Q18. The  ignore_user_abort( )  function sets whether a client disconnect should abort a
script execution. In what scenario would you, as a web developer, use this function?
Q19. The PHP function array_reduce() takes a callback function that accepts a value carried over
each iteration and the current item in the array, and reduces an array to a single value. Which
code sample will sum and output the values in the provided array?
[ ]
1 if (!$_SESSION['myusername']) 
2 { 
3 header('locaton: /login.php'); 
4 exit; 
5 }
 This script times out the session for myusername.
 Cookies are starting to be stored as a result of this script.
 This script validates the username and password.
 This script is on a page that requires the user to be logged in. It checks to see if the user has a
valid session.
 all of these answers
 #This is a comment
  /* This is a comment */
 // This is a comment
 for
 do-while
 while
 foreach
 You would use it to stop a user from clicking the back button if they decide not to view as a
result of a click.
 You would use this function if you have some important processing to do and you do not want
to stop it, even if your users click Cancel.
 You would use this function if you wanted to abort the script for all logged-in users, not just
the one who disconnected.
 You would use this function if you want a PHP script to run forever.
 1 <?php 
 2 echo array_reduce([1, 2, 5, 10, 11], function ($item, $carry) { 
[ ]
[ ]
[x]
Q20. Which PHP script uses a constructor to display the string "Winter is almost over!"?
[x]
[ ]
 3 $carry = $carry + $item; 
 4 }); 
 5?>
 1 <?php 
 2 echo array_reduce([1, 2, 5, 10, 11], function ($carry, $item) { 
 3 return $carry = $item + $item; 
 4 }); 
 5?>
 1 <?php 
 2 array_reduce([11 2, 5, 10, 11], function ($item, $carry) { 
 3 echo $carry + $item; 
 4 }); 
 5?>
 1 <?php 
 2 echo array_reduce([1, 2, 5, 10, 11], function ($carry, $item) { 
 3 return $carry += $item; 
 4 }); 
 5?>
 1 class MyClass { 
 2 public function _construct() 
 3 { 
 4 echo 'Winter is almost over!'."\n"; 
 5 } 
 6 } 
 7 $userclass = new MyClass;
 1 class MyClass { 
 2 public function _construct() 
 3 { 
 4 echo 'Winter is almost over!.."\n"; 
[ ]
[ ]
Q21. How might you troubleshoot a "call to undefined function" error?
Q22. Which line could you NOT use to comment out "Space: the final frontier"?
Q23. What displays in a browser when the following code is written?  <?php echo "How much
are the bananas?"?>
 5 } 
 6 } 
 7 $userclass = new MyClass;
 1 class MyClass { 
 2 public function _construct() 
 3 { 
 4 echo 'Winter is almost over!.."\n"; 
 5 } 
 6 } 
 7 $userclass = new MyClass;
 1 class MyClass { 
 2 public function _construct() 
 3 { 
 4 echo 'Winter is almost over!'."n"; 
 5 } 
 6 } 
 7 $userclass = MyClass;
 Make sure you have imported the file containing the function.
 Make sure you have spelled the function name correctly.
 all of these answers
 Make sure the function declaration is at an earlier point in the code than the function call.
  /* Space: the final frontier */
  */ Space: the final frontier /*
  #Space: the final frontier
  // Space: the final frontier
 The browser would display nothing due to a syntax error.
 The browser would display an error, since there are no parentheses around the string.
 The browser would display  How much are the bananas?
 The browser would display an error, since there is no semicolon at the end of the echo
command.
Q24. Which operator would youuse to find the remainder after division?
Q25. What is the significance of the three dots in this function signature?
Q26. Assuming the  Horse  class exists, which is a valid example of inheritance in PHP?
Q27. Both triple === and double == can be used to ** variables in php. If you want to hear that
string "33" and the number 33 are equal, you would use ** . If you want to check if an array
contains a particular string value at a particular index, you would use _
Q28. Your php page is unexpectedly rendering as totally blank. Which step will shed light on the
problem?
Q29. Which is the way to create an array of "seasons"?
 /
 %
 //
 DIV
function process(...$vals) { 
 // do some processing 
}
 It makes the function variadic, allowing it to accept as an argument an array containing an
arbitrary number of values.
 It makes the function variadic, allowing it to accept an arbitrary number of arguments that are
converted into an array inside the function.
 It temporarily disables the function while debugging other parts of the script.
 It's a placeholder like a TO DO reminder that automatically triggers a notice when you run a
script before completing the function definition.
  class Pegasus extends Horse {}
  class Alicorn imports Pegasus, Unicorn {}
  class Unicorn implements Horse {}
  class Horse inherits Unicorn {}
 compare; doubles; triples
 compare; triples; doubles
 assign; triples; doubles
 assign; doubles; triples
 Add this code to the top of your script:  ini_set('display_errors',1);
 check the server error logged
 all of these answers
 make sure you are not missing any semicolons
[ ]
Q30. Both  self  and  this  are keywords that can be used to refer to member variables of an
enclosing class. The difference is that  $this->member  should be used for ** members
and  self::$member  should be used for ** members.
Q31. What will this code print?
Q32. You are using the following code to find a users band, but it is returning false. Which
step(s) would solve the problem?
isset ($_GET['fav_band'])
seasons=array( 
 1=>'spring', 
 2=>'summer', 
 3=>'autumn', 
 4=>'winter', 
);
  $seasons=array(spring,summer,autumn,winter);
  $seasons=('spring','summer','autumn','winter');
  $seasons=['spring','summer','autumn','winter'];
 private, public
 object,primitive
 non-static,static
 concrete,abstract
$mathe=array('archi','euler','pythagoras'); 
array_push($mathe,'hypatia'); 
array_push($mathe,'fibonacci'); 
array_pop($mathe); 
echo array_pop($mathe); 
echo sizeof($mathe);
 euler3
 hypatia5
 hypatia3
 fibonacci4
 check if  fav_band  is included in the query string at the top of your browser
 all of the answers
 view the source of form and make sure there is an input field with the name 'fav_band'
 print everything that has been transmitted in the request:  print_r($_REQUEST);
Q33. Which code would you use to print all the elements in an array called  $cupcakes ?
Q34. What is the cause of 'Cannot modify header information - headers already sent'?
Q35. Which php control structure is used inside a loop to skip the rest of the current loops code
and go back to the start of the loop for the next iteration
Q36. The php not operator is !. Given the snippet, is there an out put and what is it?
Q37. You want to list the modules available in your PHP installation. What command should you
run?
Q38. For the HTML form below, what is the correct functioning script that checks the input
"mail" to be sure it is filled before proceeding?
 all of the answers
  print_r($cupcakes);
  var_dump($cupcakes);
  foreach($cupcakes as &$cupcake) echo $cupcake;
 You are trying to modify a private value
 Semicolon missing
 Using a key on an array that does not exists
 Some html is being sent before a  header()  command that you are using for a redirect
  else
  break
  return
  continue
 there is an output '2 is an even number
 output '21 is an odd number'
 no output. Syntax error do to missing semicolon at the end
 no output due to % in $num%2!=0
  php -h
  php info
  php -v
  php -m
if (!empty($_POST["mail"])) { 
echo "Yes, mail is set"; 
} else { 
echo "No, mail is not set"; 
} (correct)
Q39. What is the value of  $result  in this calculation?
$result = 25 % 6;
Q40. What is the job of the controller as a component in MVC?
Q41. Why does this code trigger an error?
$string = 'Shylock in a Shakespeare's "Merchant of Venice" demands his pound of flesh.';
Q42. A PDO object called  $db  has been set up to use for database operations, including user
authentication. All user-related properties are set. The script line  public function
__construct(&$db)  shows a constructor that initializes all user-related properties to _ if no
user has logged in. These parameters will be properly set by the login functions when a user
logs in.
 ...
 4.167
 1.5
 4
 1
 The controller handles data passed to it by the view, and also passes data to the view. It
interprets data sent by the view and disperses that data to the approrpiate models awaiting
results to pass back to the view.
 The controller is a mechanism that allows you to create reusable code in languages such as
PHP, where multiple inheritance is not supported.
 The controller presents content through the user interface, after communicating directly with
the database.
 The controller handles specific tasks related to a specific area of functionality, handles business
logic related to the results, and communicates directly with the database.
 Strings should always be wrapped in double quotes; and double quotes inside a string should
be escaped by backslashes.
 All single and double quotes inside a string need to be escaped by backslashes to prevent a
parse error.
 The opening and closing single quotes should be replaced by double quotes; and the
apostrophe should be escaped by a backslash.
 The apostrophe needs to be escaped by a backslash to prevent it from being treated as the
closing quote.
 NULL
 TRUE
 FALSE
 0
Q43. Assuming that  $first_name  and  $family_name  are valid strings, which statement is
invalid?
Q44. Which code snippet demonstrates encapsulation?
[ ]
[ ]
[ ]
[x]
Q45. The following XML document is in books.xml. Which code will output "Historical"?
  echo $first_name. ' '. $family_name;
  print $first_name, ' ', $family_name;
  print $first_name. ' '. $family_name;
  echo $first_name, ' ', $family_name;
 class Cow extends Animal { 
 private $milk; 
 }
 class Cow { 
 public $milk; 
 } 
 $daisy = new Cow(); 
 $daisy->milk = "creamy";
 class Cow { 
 public $milk; 
 function getMilk() {` 
 return $this->milk; 
 } 
 }
 class Cow { 
 private $milk; 
 public function getMilk() { 
 return $this->milk; 
 } 
 }
[ ]
[x]
[ ]
[ ]
Q46. When it comes to the value of a variable, what is the difference between NULL and empty?
<books> 
 <book> 
 <title>A Tale of Two Cities</title> 
 <author>Charles Dickens</author> 
 <categories> 
 <category>Classics</category> 
 <category>Historical</category> 
 </categories>
 </book> 
 <book> 
 <title>Then There Were None</title> 
 <author>Agatha Christies</author> 
 <categories> 
 <category>Mystery</category> 
 </categories>
 </book> 
</books>
 $books = simplexml_load_string('books.xml'); 
 echo $books->book[0]->categories->category[1];
 $books = simplexml_load_file('books.xml'); 
 echo $books->book[0]->categories->category[1];
 $books = SimpleXMLElement('books.xml'); 
 echo $books->book[0]->categories->category[1];
 $books = SimpleXML('books.xml'); 
 echo $books->book[0]->categories->category[1];
 NULL is a blank value; empty is the lack of a value.
 A NULL value has an allocated address in memory; empty does not.
 NULL referes to the lack of a value for an integer; empty refers to the lack of a value for a
string.
 NULL is the lack of a value; empty is a blank value.
Q47. What would be agood name for this function?
Q48. If you want to pass a formfield to another page when a button is clicked, you should use
the ** . If you want to store information across multiple pages, you should use the ** ?
Q49. You are using the following code to decide if a button is clicked, but it is never returning
true. Which step is most likely to shed light on the problem?
Q50. Why should you follow a PSR standard?
Q51. What are getters and setters?
function doStuff($haystack, $needle) { 
 $length = strlen($needle) 
 if (substr($haystack, 0, $length) == $needle) 
 return true; 
 else 
 return false; 
}
  equals
  endsWith
  startsWith
  contains
 request; response
 response; request
 session; request
 request; session
isset($_POST['submit'])
 Make sure the input field displaying the button is named 'submit'
 Make sure you are not missing any semicolons
 Print everything in the session  print_r($_SESSION);
 Look in the query string at the top of your browser to see if submit is assigned a value
 because coding standards often vary between developers and companies
 because coding standards are monitored for compliance across developers and companies
 because there are mandatory coding standards among developers and companies
 if using certain platforms, because the PSR's apply to those platforms only
 Getters and setters ensure that if a data member is declared private, then it can be accessed
only within the same function, not by an outside class
Q52. What are the recommended settings in the PHP configuration file, php.ini, for a testing
environment?
[ ]
[x]
[ ]
[ ]
Q53. Which PHP variable name is invalid?
Q54. Which command will extract the domain suffix ("com") from the string  $string =
"https://cat-bounce.com"; ?
 Getters and setters are utility functions within PHP that allow loading from, and saving to, a
database
 Getters and setters encapsulate the fields of a class by making them acccessible only through
its private methods, and keep the values themselves public
 Getters and setters are methods used to declare or obtain the values of variables, usually
private ones
 report_errors = E_ALL 
 display_errors = On
 error_reporting = E_ALL 
 display_errors = On
 error_reporting = E_ALL & ~E_NOTICE 
 display_errors = Off
 error_reporting = E_ALL & ~E_NOTICE 
 display_errors = On
  $Double
  $double
  $_2times
  $2times
  sub($string, -3)
  substr($string, -3)
  substr($string, 3)
  $string.substr(-3)
Q55. Where is PHP code executed?
Q56. Which is not a valid magic constant?
Reference
Q57. What below script will print?
Q58. When should this php script be used?
 in the client's browser
 in the virtual machine
 in the memory of the computer viewing the webpage
 on a web server
  __RESOURCE__
  __FUNCTION__
  __CLASS__
  __TRAIT__
 if( 1 == true){ 
 echo "1"; 
 } 
 if( 1 === true){ 
 echo "2"; 
 } 
 if("php" == true){ 
 echo "3"; 
 } 
 if("php" === false){ 
 echo "4"; 
 }
 134
 13
 1
 123
$secret_word = 'if i ate spinach'; 
setcookie('login', $_REQUEST['username']. ','. md5($_REQUEST['username'].$secret_word));
 when a user goes to pay for an item online
 when items are placed in a cart
https://www.php.net/manual/en/language.constants.magic.php
Q59. A PHP "variable variable" takes the value of a variable and treats that as the name of a
variable. For example, if  $var  is a variable then  $$var  is a variable variable whose name is the
value of  $var . Which script produces the output below, using variable variables?
Q60. Imagine a web application, built following a MVC architecture, that contains a quiz and a
button to score it, When the user presses the Score button, which component should handle the
 at first registration
 at every login, for security
Cat 
Dog 
Dog 
 :
 $name = "Cat"; 
 $name = "Dog"; 
 echo $name . "<br/>"; 
 echo $$name . "<br/>"; 
 echo $Dog;
 :
 $name = "Cat"; 
 $$name = "Dog"; 
 echo $name . "<br/>"; 
 echo $$name . "<br/>"; 
 echo $Dog;
 :
 $name = "Cat"; 
 $$name = "Dog"; 
 echo $name . "<br/>"; 
 echo $$name . "<br/>"; 
 echo $Cat;
 :
 $name = "Cat"; 
 $$name = "Dog"; 
 echo $name . "<br/>"; 
 echo $name . "<br/>"; 
 echo $Cat;
request?
Q61. Which script might be used to continue a user's search for music, across different
webpages?
Q62. Which PHP script finds the earliest and latest dates from an array?
 router
 controller
 model
 view
 :
 <?php 
 start_session(); 
 $music = $_SESSION['music']; 
 ?>
 :
 <?php 
 session_start(); 
 $music = $SESSION['music']; 
 ?>
 :
 <?php 
 start_session(); 
 $music =$session['music']; 
 ?>
 :
 <?php 
 session_start(); 
 $music = $_SESSION['music']; 
 ?>
 :
 <?php 
 $dates = array('2018-02-01', '2017-02-02', '2015-02-03'); 
 echo "Latest Date: ". max($dates)."\n"; 
Q63. What is the resulting output of this for statement?
 echo "Earliest Date: ". min($dates)."\n"; 
 ?>
 :
 <?php 
 $dates = array('2018-02-01', '2017-02-02', '2015-02-03'); 
 echo "Latest Date: ". min($dates)."\n"; 
 echo "Earliest Date: ". max($dates)."\n"; 
 ?>
 :
 <?php 
 $dates = array('2018-02-01', '2017-02-02', '2015-02-03'); 
 echo "Latest Date: ". ($dates)."\n"; 
 echo "Earliest Date: ". ($dates)."\n"; 
 ?>
 :
 <?php 
 $dates = array('2018-02-01', '2017-02-02', '2015-02-03'); 
 echo "Latest Date: " max($dates)."\n"; 
 echo "Earliest Date: " min($dates)."\n";
 ?>
$kilometers = 1; 
for (;;) { 
 if ($kilometers > 5) break; 
 echo "$kilometers kilometers = ".$kilometers*0.62140. " miles. <br />"; 
 $kilometers++; 
}
 :
 kilometers = 0.6214 miles. 
 kilometers = 1.2428 miles. 
 kilometers = 1.8642 miles. 
 kilometers = 2.4856 miles. 
 kilometers = 3.107 miles. 
 :
Q64. In PHP 7, What is the correct way to import multiple classes from namespace in a single
declaration ?!
Q65. Which is the most complete list of data types that PHP supports?
reference
Q66. What type of computer language is PHP?
reference
Q67. Which superglobal variable holds information about headers, paths, and script locations?
 kilometers = 0.6214 miles. 
 kilometers = 1.2428 miles. 
 kilometers = 1.8642 miles 
 kilometers = 2.4856 miles. 
 kilometers = 3.107 miles. 
 kilometers = 3.7284 miles. 
 :
 kilometers = 1.2428 miles. 
 kilometers = 1.8642 miles. 
 kilometers = 2.4856 miles. 
 kilometers = 3.107 miles. 
 FATAL ERROR syntax error, unexpected ')', expecting ';' on line number 2
 use myApp\myNamespace{ClassA, ClassB, ClassC};
 use myApp\myNamespace\ClassA, ClassB, ClassC;
 use myApp\myNamespace[ClassA, ClassB, ClassC];
 use myApp\myNamespace(ClassA, ClassB, ClassC);
 string, integer, float, boolean, array, object, NULL, resource
 string, integer, boolean, array, object, NULL, resource
 string, integer, float, array, object, NULL, resource
 string, integer, float, boolean, array, object, NULL
 server-side scripting language
 compiled language
 machine language
 algorithmic language
  $_SERVER
  $SERVER_VARIABLES
https://www.w3schools.com/php/php_datatypes.asp
https://www.quora.com/Which-programming-language-is-used-to-create-PHP
reference
Q68. Describe what happens if you run this code in a testing environment:
Also, 'france' key must be capitalized!
Q69. DRY (Don't Repeat Yourself) is a principle of software development aimed at reducing
repetition of software patterns. Which choice is not a way to write DRYer code with PHP?
Q70. Which code will return the IP address of the client?
Both 2 and 4 are correct!
Q71. Your site must allow uploading of large files. What might you need to do?
Q72. What is the output of this script?
  $_ENV
  $GLOBALS
$capitals = ['UK' => 'London', 'France' => 'Paris']; 
echo "$capitals['france'] is the capital of France.";
 It displays: "Paris is the capital of France."
 It displays: " is the capital of France."
 It triggers a syntax error because the array keys on line 1 are in quotes.It triggers a syntax error because the array key on line 2 is in quotes.
 inheritance
 classes
 namespacing
 dependency injection
  $HTTP_SERVER_VARS("REMOTE_IP")
  $_SESSION["REMOTE_ADDR"];
  $_SERVER["HTTP_X_FORWARDED_FOR"]
  getenv("REMOTE_ADDR")
 Make sure the user has the proper permissions.
 Keep a count of upload file sizes and log them.
 Change the  upload_max_filesize  configuration parameter.
 Be sure to use chunked transfer encoding.
$my_text = 'The quick grey [squirrel].'; 
preg_match('#\[(.*?)\]#', $my_text, $match); 
print $match[1]."\n";
http://www-db.deis.unibo.it/courses/TW/DOCS/w3schools/php/php_superglobals.asp.html
Q73. What is the output of this script?
$fruits = ['apple', 'orange', 'pear', 'mango', 'papaya'];   $i = 0;   echo $fruits[$i+=3];
Q74. What are some of the main types of errors in PHP?
Q75. What is the correct way to include the file gravy.php in the middle of HTML code?
Q76. Which two functions can sanitize text and validate text formats?
Q77. Why is it not recommended to make all of a class's variables public?
Q78. You want to use wildcard characters when searching for records in a MySQL/MariaDB
database using a PDO prepared statement. Which code should you use?
 squirrel
 The quick grey [squirrel].
 [squirrel]
 The quick grey squirrel.
 mango
 apple
 a parse error
 pear
 notices, warnings, fatal
 runtime, logical, compile
 semantic, logical, syntax
 warnings, syntax, compile
  <!-- include file="gravy.php"; -->
  <?php include gravy.php; ?>
  <?php include "gravy.php"; ?>
  <?php include file="gravy.php"; ?>
  session_start()  and  filter_input()
  filter_var()  and  filter_input()
  preg_match()  and  strstr()
 Doing so makes your code tightly coupled.
 The attribute may be accessed only by the class that defines the member.
 You will have no control over which values the attribute can take. Any external code will be
able to change it without any constraint.
 You can then access the attribute only within the class itself, and by inheriting and parent
classes.
Q79. Create an associative array using  $array1  as the keys and  $array2  as the values:
$array1 = ['country', 'capital', 'language'];   $array2 = ['France', 'Paris', 'French'];
Q80. Assume that  $r  is 255, and  $g  and  $b  are both 0. What is the correct code to
output  "#ff0000" ?
Q81. You want to find out what day Twelfth Night falls on after Christmas 2018. Which code
should you use?
1 seems correct, but the question asks for "day", not day of the week. Twelfth Night is the "06"
day of January, 2019.
Q82. Which loop displays all numbers from 1 to 10 inclusive?
  $statement->bindValue(':name', '%' . $_GET['name'] . '%');
  $statement->bindValue('%' . $_GET['name'] . '%', ':name');
  $statement->bindParam(':name', '%' . $_GET['name'] . '%');
  $statement->bindParam('%' . $_GET['name'] . '%', ':name');
  $array3 = array_merge($array1, $array2);
  $array3 = array_union($array1, $array2);
  $array3 = array_keys($array1, $array2);
  $array3 = array_combine($array1, $array2);
  printf('#%2x%2x%2x', 255, 0, 0);
  printf('#%2X%2X%2X', $r, 0, 0);
  printf('#%x%x%x', 255, 0, 0);
  printf('#%02x%02x%02x', 255, 0, 0);
  $xmas = new DateTime('Dec 25, 2018');   $twelfth_night = $xmas->add(new
DateInterval('P12D'));   echo $twelfth_night->format('l');
  $twelfth_night = strtotime('December 25, 2018 + 12 days');   echo date('d',
$twelfth_night);
  $twelfth_night = strtotime('December 25, 2018 + 12 days');   echo strftime('%d',
$twelfth_night);
  $xmas = new DateTime('Dec 25, 2018');   $twelfth_night = $xmas->add(strtotime('12
days'));   echo $twelfth_night->format('D');
  $i = 1;   while ($i < 10) {   echo $i++ . '<br/>';   }
  $i = 0;   while ($i <= 10) {   echo $i++ . '<br/>';   }
  while ($i &lt;= 10) {   echo ++$i . '<br/>';   }
  $i = 0;   while ($i < 10) {   echo ++$i . '<br/>';   }
Q83. Which are types of control structures in PHP?
reference
Q84. Which function can you use in error handling to stop the execution of a script and is
equivalent to exit()?
Q85. Is the output of this code in descending order, shown vertically, and with spaces between
numbers? And what is the output?
Q86. Which is not true of the  toString()  in PHP?
Q87. What is a generator and how is it used in PHP?
  break ,  continue ,  do-while ,  exception ,  for ,  foreach ,  if ,  switch ,  throw ,  while
  values ,  operators ,  expressions ,  keywords ,  comments
  for ,  foreach ,  if ,  else ,  else if ,  switch ,  tries ,  throws ,  while
  if-then-else ,  do-while ,  for-each ,  go-to ,  stop-when
  die
  return
  throw
  break
$numbers = array(4,6,2,22,11); 
sort($numbers); 
$arrlength = count($numbers); 
for($x = 0; $x < $arrlength; $x++){ 
 echo $numbers[$x]; 
 echo "<br />"; 
 }
 This does not meet all the criteria because the resulting numbers will be "2461122", which is in
no particular order.
 This meets the criteria because the
 is present and sort() lists in descending order
 This does not meet all the criteria because the sort() function sorts an indexed array in
ascending order. Thus this code will display "2 4 6 11 22" shown vertically, but the numbers are
spaced.
 does not meet all the criteria because the echo simply result in showing the array numbers in
the order shown within the $numbers array, which is ascending
 It saves a lot of work of using setters methods to access the values of objects.
 It saves a lot of work of using getters methods to access the values of objects.
 It allows you to call an object and see its components as a string.
 It is automatically called when you use echo or print.
https://www.php.net/manual/en/language.control-structures.php
Q88. What is the best description of what this script is/does?
Q89. What is the output of this code?
echo 5 % 0.75;
Q90. Can you extend a final defined class?
Q91. How can you test if a checkbox is set?
Actually both are correct, option 3 is actually testing if a checkbox is not set
 A generator is a function that produces a series of random values for unit testing code.
 A generator is a simple iterator capable of producing a series of results. It has the same syntax
as a function, except it uses "next" instead of "return".
 A generator is a simple iterator capable of producing a series of results. It has the same syntax
as a function, except it uses "yield" instead of "return".
 A generator is a function capable of producing a series of results. At the end of the series, it
automatically starts from the first one again.
if( isset($user_info['url']) ) { 
 $_SESSION["loggedIn"] = true; 
 $_SESSION["username"] = $myusername; 
 header('Location: ' . $user_info['url']); //Redirects to the supplied url from the DB 
} else { 
 header("Location: error.htm"); 
}
 It directs all users to the same page when they log in.
 It is a login script for a user portal on a website.
 It keeps the user logged in across different browsers.
 It sends the user to an error page if they enter the wrong URL
 0
 0.6666666666667
 1
 fatal error (division by zero)
 No, because a final class or method declaration prevents child class or method overriding.
 Specialized versions of built-in classes can be extended by calling the parent's constructor.
 Yes, if a final class is defined as private in parent class.
 Yes, a final defined class can be used to declare constants.
 Use  !empty($_GET['test'])
 Use  isset($_GET['test'])
 Use  $_GET['test'] == ''
 all other answers
Q92. A form to subscrive to a newsletter is submitted using the POST method. The form has only
one field: an input text field named "email". How would you check if the field is empty and, if it
is, print "The email cannot be empty"?
Q93. What is the PHP fatal error type?
1. reference1
2. reference2
Q94. Which script properly validates the IP address given?
 :
if(empty($_POST['email'])) { 
 echo "The email cannot be empty"; 
}
 :
if(empty($_GET['email'])) { 
 echo "The email cannot be empty"; 
}
 :
if(empty($_POST('email'))) {echo "The email cannot be empty"; 
}
 :
if(isset($email)) { 
 echo "The email cannot be empty"; 
}
 This type of error causes a termination of the script execution when it occurs.
 This type of error's causes are not detected by compiler and causes incorrect results.
 This type of error causes erroneous results or may cause termination of program.
 This type of error causes termination after showing the list of errors and the line number where
the errors have occured.
 :
$valid = ip2long($ip) !== false;
https://www.geeksforgeeks.org/php-types-of-errors/#:~:text=an%20error%20message.-,Fatal%20Error,-%3A%20It%20is
https://www.c-sharpcorner.com/UploadFile/051e29/types-of-error-in-php/#:~:text=2.-,Fatal%20Errors,-Fatal%20errors%20are
Q95. What is the output of this code?
Q96. After creating your objects, you can call member functions related to that object, such as
setting the names and prices for three "Pet" objects. What is the likely output of this code
snippet?
 :
$ip_address = "164.12.2540.1"; 
if(filter_var($ip_address, FILTER_VALIDATE_IP)){ 
 echo "$ip_address is a valid IP address"; 
} else { 
 echo "$ip_address is not a valid IP address"; 
}
 :
$ip_address = "164.12.2540.1"; 
if(validate_ip($ip_address)){ 
 echo "$ip_address is a valid IP address"; 
} else { 
 echo "$ip_address is not a valid IP address"; 
}
 :
$ip_address = "164.12.2540.1" 
echo is_valid($ip_address, VALIDATE_IP);
 $i = 0; 
 while($i < 6) {
 if($i++ == 3) break; 
 } 
 echo "loop stopped at $i by break statement";
 loop stopped at 3 by break statement
 loop stopped at 4 by break statement
 loop stopped at 6 by break statement
 loop stopped at 2 by break statement
 $dof->setTitle("Spot"); 
 $cat->setTitle("Mimi"); 
 $horse-?setTitle("Trigger"); 
 $dog->setPrice(10); 
 $cat->setPrice(15); 
Q97. Given the associative array below, wich PHP code determines wich element(s) of the array
is/are apple?
 $horse->setPrice(7); 
 print_r($cat);
 Pet Object ( [title]=> Spot[price]=>10)
 Pet Object ( [title]=> Mimi [price]=>15 )
 Pet Object ( [title]=> Mimi[price]=>10 )
 Pet Object ( [title]=> Trigger [price]=> 7)
$array = array( 
'fruit1' => 'apple', 
'fruit2' => 'orange',
'fruit3' => 'grape', 
'fruit4' => 'apple', 
'fruit5' => 'apple');
 :
while ($fruit_name = current($array)) { 
 if ($fruit_name == 'apple') { 
 echo key($array).'<br />'; 
 } 
 next($array); 
}
 :
while ($fruit_name = current($array)) { 
 if ($fruitname == 'apple') { 
 echo key($array).'<br />'; 
 } 
 next($array); 
}
 :
while ($fruit_name = current($array)) { 
 if ($fruit_name == 'apple') 
 echo key($array).'<br />'; 
 } 
 next($array); 
}
Q98. What does this code return?
Q98. What does this code print?
Q99. You have an online form with a file input field called "image" for uploading files. Assuming
the path to the upload directory is $path, which code should you use to make sure the file is
uploaded from your form to the correct location?
[maybe] :
 :
while ($fruit_name = current($array)) { 
 if ($fruit_name == 'apple') { 
 echo key($array).'<br />'; 
 }
class Smurf { 
 public $name = "Papa Smurf"; 
 public function __construct($name) { 
 $this->name = $name; 
 } 
 public function set_name($name) { 
 $name = $name; 
 } 
} 
$smurf = new Smurf("Smurfette"); 
$smurf->set_name("Handy Smurf"); 
echo $smurf->name;
 nothing
 Handy Smurf
 Smurfette
 Papa Smurf
 :
1 if ($_FILES['image'][error'] == 0) { 
2 move_uploaded_file($_FILES)['image']['temp_name'], 
3 $path . $_FILES['image']['name']); 
4 )
Q93. Which super global variable holds information about headers, paths, and script locations?
1 if ($_FILES['image'][error'] === false) { 
2 move_uploaded_file($_FILES)['image']['temp_name'], 
3 $path . $_FILES['image']['name']); 
4 )
 :
1 if ($_FILES['image'][error'] == 0) { 
2 copy($_FILES)['image']['temp_name'], 
3 $path . $_FILES['image']['name']); 
4 )
 :
1 if ($_FILES['image'][error'] === false) { 
2 upload_file($_FILES)['image']['temp_name'], 
3 $path . $_FILES['image']['name']); 
4 )
  $_GET
  $GLOBALS
  $_SESSION
  $_SERVER