PHP error Warning:mysql_query () workaround, warningmysql_query_php tutorial

PHP error Warning:mysql_query () workaround, Warningmysql_query

PHP prompt Error: warning:mysql_query () [Function.mysql-query]: Access denied for user ' ODBC ' @ ' localhost ' (using Password:no)
Code:

Reason:
Mysqlclass the second beginning of the Mysqlclass, first the first to make the same $this->link, and then call the __CONSTRUCT function will shut down this->link.
Finally, the MySQL resource in $db is empty and the error pops up.
Workaround:
$db = $db? $db: New Mysqlclass ();
Or
$this->link=mysql_connect ($host, $user, $PW, true);

Hope to provide a solution that can really help everyone.

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