What is the purpose of the isset() function in PHP when handling form submissions?

Which PHP superglobal array is used to retrieve form data sent with the POST method?

A). $_POST

B). $_GET

C). $_REQUEST

D). $_SERVER

How can you check if a checkbox is checked in PHP when submitted via a form?

A). isset($_POST['checkbox'])

B). $_POST['checkbox'] == 'checked'

C). $_POST['checkbox'] === 'checked'

D). empty($_POST['checkbox'])

What is the purpose of the explode() function in PHP?

A). To split a string into an array based on a specified delimiter.

B). To join array elements into a string using a specified delimiter.

C). To sort an array in ascending order.

D). To merge two or more arrays.

What function is used to validate email addresses in PHP?

A). validate_email()

B). filter_var()

C). check_email()

D). email_validate()

What is the purpose of the htmlspecialchars() function in PHP?

A). To convert HTML entities to their corresponding characters.

B). To remove HTML tags from a string.

C). To encode special characters in HTML format.

D). To decode special characters in HTML format.

Which PHP function is used to handle file uploads?

A). upload_file()

B). process_upload()

C). handle_upload()

D). move_uploaded_file()

Which attribute of the HTML <form> element specifies the HTTP method to be used when submitting the form data?

A). method

B). action

C). type

D). enctype

What type of attribute is used in an HTML form to specify where to send the form data?

A). method

B). action

C). type

D). name

What is the purpose of the trim() function in PHP?

A). To remove whitespace from the beginning and end of a string.

B). To truncate a string to a specified length.

C). To convert a string to lowercase.

D). To convert a string to uppercase.

Which PHP function is used to redirect the user to another page?

A). redirect()

B). header()

C). forward()

D). location()