php - Insert newly created id value into the column of another table as Foreign key -

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hello php , mysql noob here

i'm creating form create new user , @ same time add contact
user , contact in 2 different table

and need newly user_id reference user_id(fk) in tbl_contact

how it?

first of insert user

mysql_query("insert tbl_user (...) values (...)");

then retrieve last inserted id 

$liid=mysql_insert_id();

then insert contact id

mysql_query("insert tbl_contact (user_id,...) values ($liid,...)");

refrence

if want use mysqli

$mysqli->query("insert tbl_user (...) values (...)"); $liid=$mysqli->insert_id; $mysqli->query("insert tbl_contact (user_id,...) values ($liid,...)");

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