is_uploaded_file() function in PHP checks whether a file was uploaded via HTTP POST.
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 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 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
How can you prevent SQL injection attacks in PHP?
A). Use prepared statements with parameterized queries.
B). Escape user input using the htmlspecialchars() function.
C). Sanitize user input using the filter_var() function.
D). Validate user input using regular expressions.
Which function is used to check if a variable is an array in PHP?
A). is_array()
B). check_array()
C). array_check()
D). isArray()
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
Which PHP superglobal array is used to retrieve form data sent with the POST method?
A). $_POST
B). $_GET
C). $_REQUEST
D). $_SERVER
Which PHP superglobal array is used to retrieve form data sent with the POST method?
A). $_POST
B). $_GET
C). $_REQUEST
D). $_SERVER
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
Which PHP function is used to sanitize user input to prevent SQL injection attacks?
A). strip_tags()
B). htmlspecialchars()
C). mysql_real_escape_string()
D). trim()