What is the purpose of the PHP exit() function?

What is the purpose of the PHP include statement?

A). To include and evaluate an external PHP file

B). To create a loop in PHP

C). To define a function in PHP

D). To execute a SQL query

What is the purpose of the PHP mysqli_query() function?

A). To execute a SQL query on a MySQL database

B). To validate user input

C). To include an external file

D). To declare a variable

What file extension is commonly used for PHP scripts?

A). .php

B). .html

C). .js

D). .css

Which of the following is true about PHP sessions?

A). Sessions allow data to be persistently stored across multiple page requests

B). Sessions are stored on the client side

C). Sessions are limited to storing only strings

D). Sessions are enabled by default in PHP

What is the purpose of the PHP echo statement?

A). To output data to the browser

B). To define a function

C). To include an external file

D). To declare a variable

Which of the following is a correct way to start a PHP script?

A). <?php

B). <script>

C). <?php?>

D). <?>

Which of the following is NOT a valid PHP variable name?

A). $my_var

B). $myVar

C). $my-var

D). $myVar123

Which of the following is used to comment out a single line of PHP code?

A). //

B). /* */

C). <!-- -->

D). <?php ?>

Which of the following is a correct way to define a constant in PHP?

A). define('MY_CONST', 'value');

B). $MY_CONST = 'value';

C). const MY_CONST = 'value';

D). MY_CONST = 'value';

What is the output of the following PHP code? <?php $x = 5; $y = 10; echo $x + $y; ?>

A). 15

B). 5 + 10

C). $x + $y

D). 510