Table locks

[Tim Best <tim@best-it.biz>]

Anyone know how you set a lock in a MySQL table using PHP?

I tried:

$select = ³LOCK TABLES t1 WRITE;²;
$select .= ³select * from t1;²;
$select .= ³UNLOCK tables;¹;

When I run mysql_db_query(³db²,$select,$conn);  it always returns nothing.
Any insights would be appreciated!

Thanks,
/T