how to take a a result from query to serch for it in another database [duplicate]

I have 2 databases 1st one for employees name and phone number and salary and the second database is for their accounts contain name and password and account type my question How can I make a query with php and mysql to search for employee name and base on his phone number will show me all other info

I tried to take $row["phone"]; to make a static value to search in the other database but no result to show

thank you

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