echo 'Hello, World!'; do?
echo statement in PHP is used to output text. In this case, it prints 'Hello, World!' to the browser.
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 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
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 variable name?
A). $my_var
B). $MyVar
C). $my-var
D). $myVar123
Which of the following is NOT a valid PHP comparison operator?
A). <=
B). ==
C). <>
D). !
What is the 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 purpose of the PHP exit() function?
A). To terminate the script execution
B). To print output to the browser
C). To create a loop in PHP
D). To define a function in PHP
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 a valid PHP constant?
A). MY_CONST
B). $myConst
C). MY_CONST
D). myConst
Which of the following is true about PHP data types?
A). PHP is a strongly typed language
B). Variables must be explicitly declared with data types
C). PHP supports dynamic typing
D). PHP only supports numeric data types