PHP Part-II

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PHP Part-II

What is the value of $result in this calculation? *

1 point

4.167

1.5

What is the cause of 'Cannot modify header information - headers already sent'? *

1 point

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

The following XML document is in books.xml. Which code will output "Historical"? *

1 point

Option 1

Option 2

Option 3

Option 4

Other:

You want to list the modules available in your PHP installation. What command should you run? *

1 point

php -h

php info

php -v

php -m

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. *

1 point

NULL

TRUE

FALSE

What would be a good name for this function? *

1 point

equals

endsWith

startsWith

contains

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 *

1 point

else

break

return

continue

What is the job of the controller as a component in MVC? *

1 point

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.

What are getters and setters? *

1 point

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

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

What will this code print? *

1 point

euler3

hypatia5

hypatia3

fibonacci4

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 _ *

1 point

compare; doubles; triples

compare; triples; doubles

assign; triples; doubles

assign; doubles; triples

Your php page is unexpectedly rendering as totally blank. Which step will shed light on the problem? *

1 point

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

The php not operator is !. Given the snippet, is there an out put and what is it? *

1 point

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

Assuming that $first_name and $family_name are valid strings, which statement is invalid? *

1 point

echo $first_name. ' '. $family_name;

print $first_name, ' ', $family_name;

print $first_name. ' '. $family_name;

echo $first_name, ' ', $family_name;

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? *

1 point

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

When it comes to the value of a variable, what is the difference between NULL and empty? *

1 point

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.

Assuming the Horse class exists, which is a valid example of inheritance in PHP? *

1 point

class Pegasus extends Horse {}

class Alicorn imports Pegasus, Unicorn {}

class Unicorn implements Horse {}

class Horse inherits Unicorn {}

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 ** ? *

1 point

request; response

response; request

session; request

request; session

Which is the way to create an array of "seasons"? *

1 point

Option 1

$seasons=array(spring,summer,autumn,winter);

$seasons=('spring','summer','autumn','winter');

$seasons=['spring','summer','autumn','winter'];

You are using the following code to find a users band, but it is returning false. Which step(s) would solve the problem? *

1 point

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);

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. *

1 point

private, public

object,primitive

non-static,static

concrete,abstract

Why should you follow a PSR standard? *

1 point

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

Which code snippet demonstrates encapsulation? *