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

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

A). To check if a variable is empty

B). To check if a variable is set and is not NULL

C). To check if a variable is numeric

D). To convert a variable to a string

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 function is used to validate email addresses in PHP?

A). validate_email()

B). filter_var()

C). check_email()

D). email_validate()

Which PHP function is used to handle file uploads?

A). upload_file()

B). process_upload()

C). handle_upload()

D). move_uploaded_file()

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'])

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 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.

What function is used to check if a file upload operation was successful in PHP?

A). file_exists()

B). is_uploaded_file()

C). move_uploaded_file()

D). file_upload_successful()

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.