What does the PHP statement echo 'Hello, World!'; do?
A). Prints 'Hello, World!' to the browser
B). Declares a variable named 'Hello, World!'
C). Performs a calculation
D). Defines a function named 'Hello, World!'
What is the correct syntax to start a PHP script?
A). <?php
B). <script>
C). <?>
D). <!DOCTYPE php>
Which of the following is a valid PHP constant?
A). MY_CONST
B). $myConst
C). MY_CONST
D). myConst
What is the purpose of the PHP print_r() function?
A). To print human-readable information about a variable
B). To redirect output to a file
C). To execute SQL queries
D). To define a function in PHP
What is the purpose of the PHP require_once statement?
A). To include and evaluate an external PHP file only once
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 unset() function?
A). To destroy a specified variable
B). To create an array in PHP
C). To execute SQL queries
D). To define a function in PHP
Which of the following is NOT a valid PHP comparison operator?
A). <=
B). ==
C). <>
D). !
Which of the following is true about PHP variables?
A). Variables must be declared before use
B). Variable names are case-insensitive
C). Variables cannot be reassigned
D). Variables can only store integers
What is the purpose of the PHP require statement?
A). To include and evaluate an external PHP file
B). To define a function in PHP
C). To create a loop in PHP
D). To execute a SQL query
Which of the following symbols is used to concatenate strings in PHP?
A). +
B). <>
C). .
D). -