Which PHP function is used to disconnect from MySQL database connection?

PHP provides us mysql_close() function with the help of which we can disconnect from the MySQL database anytime. This function takes a single parameter, which is a connection returned by the mysql_connect() function. Its syntax is as follows −

Syntax

bool mysql_close ( resource $link_identifier );

Here, if a resource is not specified, then the last opened database is closed. This function returns true if it closes the connection successfully otherwise it returns false.