What does the unlink() function mean?
The unlink() function is dedicated for file system handling. It simply deletes the file given as entry.
How do I check if a given variable is empty?
If we want to check whether a variable has a value or not, it is possible to use the empty() function.
How can we check the value of a given variable is alphanumeric?
It is possible to use the dedicated function, ctype_alnum to check whether it is an alphanumeric value or not.
How can we check the value of a given variable is a number?
It is possible to use the dedicated function, is_numeric() to check whether it is a number or not.
How can we access the data sent through the URL with the POST method?
To access the data sent this way, you use the $_POST array. Imagine you have a form field called ‘firstname’ on the form when the user clicks submit to the…
How can we access the data sent through the URL with the GET method?
To access the data sent via the GET method, we use $_GET array like this: www.url.com?var=value $variable = $_GET; this will now contain 'value'
What is the difference between mysqli_fetch_object() and mysqli_fetch_array()?
The mysqli_fetch_object() function collects the first single matching record where mysqli_fetch_array() collects all matching records from the table in an array.
Which function gives us the number of affected entries by a query?
mysqli_affected_rows() return the number of entries affected by an SQL query.
How is it possible to know the number of rows returned in the result set?
The function mysqli_num_rows() returns the number of rows in a result set.
How be the result set of Mysql handled in PHP?
The result set can be handled using mysqli_fetch_array, mysqli_fetch_assoc, mysqli_fetch_object or mysqli_fetch_row.