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.
What is the function mysql_pconnect() useful for?
mysql_pconnect() ensure a persistent connection to the database, it means that the connection does not close when the PHP script ends. This function is not supported in PHP 7.0 and above
How can we connect to a MySQL database from a PHP script?
To connect to a MySQL database, we must use mysqli_connect() function as follows: <!--?php $database = mysqli_connect("HOST", "USER_NAME", "PASSWORD"); mysqli_select_db($database,"DATABASE_NAME"); ?-->
What is the function file_get_contents() useful for?
file_get_contents() lets reading a file and storing it in a string variable.
What should we do to be able to export data into an Excel file?
The most common and used way is to get data into a format supported by Excel. For example, it is possible to write a .csv file, to choose for example…
What does the PHP error ‘Parse error in PHP – unexpected T_variable at line x’ means?
This is a PHP syntax error expressing that a mistake at the line x stops parsing and executing the program.