is_uploaded_file() function in PHP checks whether a file was uploaded via HTTP POST.
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 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.
Which PHP function is used to handle file uploads?
A). upload_file()
B). process_upload()
C). handle_upload()
D). move_uploaded_file()
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.
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
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'])
How can you access the value of a form field named 'username' submitted via the POST method in PHP?
A). $_GET['username']
B). $_POST['username']
C). $_REQUEST['username']
D). $_SERVER['username']
Which PHP function is used to redirect the user to another page?
A). redirect()
B). header()
C). forward()
D). location()
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.