$_POST. The $_POST array contains key-value pairs of data sent to the script via the HTTP POST method.
What is the purpose of the isset() function in PHP when handling form submissions?
A). To check if a variable is empty
B). To check if a variable is set and is not NULL
C). To check if a variable is numeric
D). To convert a variable to a string
Which PHP function is used to sanitize user input to prevent SQL injection attacks?
A). strip_tags()
B). htmlspecialchars()
C). mysql_real_escape_string()
D). trim()
Which attribute of the HTML <form> element specifies the HTTP method to be used when submitting the form data?
A). method
B). action
C). type
D). enctype
What is the purpose of the isset() function in PHP when handling form submissions?
A). To check if a variable is empty
B). To check if a variable is set and is not NULL
C). To check if a variable is numeric
D). To convert a variable to a string
What is the purpose of the explode() function in PHP?
A). To split a string into an array based on a specified delimiter.
B). To join array elements into a string using a specified delimiter.
C). To sort an array in ascending order.
D). To merge two or more arrays.
Which function is used to check if a variable is an array in PHP?
A). is_array()
B). check_array()
C). array_check()
D). isArray()
How can you check if a checkbox is checked in PHP when submitted via a form?
A). isset($_POST['checkbox'])
B). $_POST['checkbox'] == 'checked'
C). $_POST['checkbox'] === 'checked'
D). empty($_POST['checkbox'])
How can you 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 PHP function is used to redirect the user to another page?
A). redirect()
B). header()
C). forward()
D). location()
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()