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MIT 6.002 Circuits and Electronics, Spring 2007 13 Online
OpenStudy (anonymous):

I want to do a php file to register a user into a database. It should first check if the mobileNo entered is already in the database. If it is there, then nothing will be added. If it isn't there, then the user will be added to the database. I tried the following but it is not working.

OpenStudy (anonymous):

What is wrong with my code?

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