How to close wpdb connection? [duplicate]

Question

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• Database connection close 3 answers

Is there any method to close connection similar to mysql_close() for wpdb in WordPress? Is it not necessary to close connection for global wpdb?

Answer 1

WP 4.5 had introduced wpdb->close() method to close connection in current instance.

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Old answer

There is no explicit method. It stores link identifier in $wpdb->dbh field, but it is protected, so not convenient to run close on.