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Locking a record

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Hey guys,


I have a form that updates a mysql db. I will have multiple user updating it. I need a script that will some how lock the form from user a when user b is using the form...I found a tutorial for this but it was in .asp --- of course in need this in .php --- any help would be great



Using - Dreamweaver 8





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Thanks for the help...one more question. This statement has me a bit confused =


Normally, you do not need to lock tables, because all single UPDATE statements are atomic; no other thread can interfere with any other currently executing SQL statement.


does this mean I should not worry about locking table, because it does it by itself?



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