It is a function that ends the connection to the database.

Select one:

a. mysql_close / mysqli_close

b. mysql_query / mysqli_query

c. mysql_connect / mysqli_connect

d. mysql_error / mysqli_error

mysql_close / mysqli_close.

Explanation:

mysql_close / mysqli_close functions are used to close the connection to the database. mysql_close is removed from the php version 7.0.0 and mysqli_close is used.

If the link in the mysql_close is not specified it so the last link opened by mysql_connect () is assumed.

It returns the value True or False. True on success false on failure.