MY_CONST is a valid constant name.
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
Which of the following statements is true about PHP arrays?
A). PHP arrays can hold values of different data types
B). PHP arrays must have continuous index values
C). PHP arrays are immutable
D). PHP arrays can only store integers
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
Which of the following PHP tags is used to start and end a block of PHP code?
A). <?php ?>
B). <? ?>
C). <script>
D). <php >
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). !
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
Which of the following is true about PHP comments?
A). Comments are ignored by the PHP interpreter
B). Comments can only be single-line
C). Comments must start with /* and end with */
D). Comments are displayed on the webpage
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 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