PHP MCQ: PHP Multiple Choice Questions and Answers

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

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

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

$result = 25 % 6;

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.

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 best way to explain what this script does?

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

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.

Why does this code trigger an error?

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

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

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

What is a key difference between GET and POST?

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 ?>

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

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

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

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

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);

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

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

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

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

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";

Which value equates to true?

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

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 is the value of $total in this calculation?

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

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?

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>

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

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 are valid PHP error handling keywords?

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 ___

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

All variables in PHP start with which symbol?

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

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

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

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

What does this code output?

echo 76 <=> '76 trombones';