Which PHP function is used to check if a file exists in PHP?

Which of the following statements is true about PHP variables?

A). Variable names are case-sensitive in PHP

B). PHP variables must start with a dollar sign ($)

C). Variable names cannot contain numbers

D). Variables in PHP cannot be reassigned

Which of the following PHP directives is used to set the maximum execution time of a script?

A). max_execution_time

B). memory_limit

C). error_reporting

D). display_errors

Which function is used to include the contents of another PHP file?

A). include()

B). require()

C). import()

D). load()

Which of the following statements correctly assigns the value 'John' to the variable $name in PHP?

A). $name = 'John';

B). 'John' = $name;

C). $name -> 'John';

D). $name <- 'John';

What does the following code output? <?php echo 5 + 3 * 2; ?>

A). 16

B). 11

C). 10

D). 6

What is the output of the following code? <?php for ($i = 0; $i < 3; $i++) { echo $i . ', '; } ?>

A). 0, 1, 2,

B). 1, 2, 3,

C). 0, 1, 2

D). 1, 1, 1,

Which function is used to retrieve the value of a query string parameter in PHP?

A). $_GET[]

B). $_POST[]

C). $_SESSION[]

D). $_COOKIE[]

Which of the following PHP tags is deprecated and should be avoided?

A). script tag

B). <?php

C). <? ... ?>

D). <?php ... ?>

What is the purpose of the semicolon (;) in PHP?

A). To indicate the end of a statement

B). To concatenate strings

C). To multiply two numbers

D). To declare a variable

What does the $_POST superglobal array contain in PHP?

A). Data submitted via an HTML form using the POST method

B). Data submitted via an HTML form using the GET method

C). Data stored in cookies

D). Data stored in session variables