PHP MCQ: PHP Multiple Choice Questions and Answers

What is a key difference between GET and POST?

Which is the most secure way to avoid storing a password in clear text in database?

What is missing from this code, which is supposed to create a test cookies?

1 $string_name = " testcookie";
2 $string_value = "This is a test cookie";
3 $expiry_info = info()+259200;
4 $string_domain = "localhost.localdomain";

What is the significance of the three dots in this function signature?

function process(...$vals) {
        // do some processing
 }

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 on whether the value on the _**is less than, equal to, or greater than the other.

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 ___

What is the value of $total in this calculation?

$total = 2 + 5 * 20 - 6 / 3

What is the purpose of adding a lowercase "u" as a modifier after the final delimiter in a Perl-compatible regular expression?

All variables in PHP start with which symbol?

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

Which is the correct format for adding a comment to a PHP script?

Which line could you NOT use to comment out "Space: the final frontier"?

In the following script, which line(s) will cause an error(s)?

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 ?>

What does this script do?

1 $email = filter_input(INPUT_POST, 'email', FILTER_VALIDATE_EMAIL);
2 if ($email === false) {
3  $emailErr = "Please re-enter valid email";
4 }

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

Which value equates to true?

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

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

Which code would you use to print all the elements in an array called $cupcakes?

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

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.

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

<books>
    <book>
        <title>A Tale of Two Cities</title>
            <author>Charles Dickens</author>
            <categories>
            <category>Classics</category>
            <category>Historical</category>
            </categories>
            </book>
        <title>Then There Were None</title>
            <author>Agatha Christies</author>
            <categories>
            <category>Mystery</category>
        </categories>
    </book>
</books>

Which code snippet uses the correct syntax for creating an instance of the Pet class?

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'])

What does this code output?

echo 76 <=> '76 trombones';

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.

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

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

$result = 25 % 6;

Why does this code trigger an error?

$string = 'Shylock in a Shakespeare's "Merchangt of Venice" demands his pound of flesh.';

What will this code print?

$mathe=array('archi','euler','pythagoras');
array_push($mathe,'hypatia');
array_push($mathe,'fibonacci');
array_pop($mathe);
echo array_pop($mathe);
echo sizeof($mathe);

What displays in a browser when the following code is written?

In a conditional statement, you want to execute the code only if both value are true. Which comparison operator should you use?

Which operator would you use to find the remainder after division?

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

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

What is the best way to explain what this script does?

1 if (!\$\_SESSION['myusername'])
2 {
3 header('locaton: /login.php');
4 exit;
5 }

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?

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

Which are valid PHP error handling keywords?