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 concatenate strings in PHP?
A). .
B). +
C). ,
D). -
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 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
What is the output of the following PHP code? <?php echo 'Hello, World!'; ?>
A). Hello, World!
B). <?php echo 'Hello, World!'; ?>
C). <?php echo 'Hello, World!'; ?>;
D). <?php echo 'Hello, World!'; ?>;
What is the purpose of the PHP interpreter?
A). To parse and execute PHP code
B). To generate HTML markup
C). To validate user input
D). To store data in databases
Which PHP directive is used to set the maximum execution time of a script?
A). max_execution_time
B). memory_limit
C). error_reporting
D). display_errors
What does the phpinfo() function do in PHP?
A). Displays information about the PHP environment
B). Executes SQL queries
C). Validates user input
D). Encrypts data transmission
What file extension is commonly used for PHP scripts?
A). .php
B). .html
C). .js
D). .css
Which of the following is a correct way to start a PHP script?
A). <?php
B). <script>
C). <?php?>
D). <?>