insert value from one table into another whilst doing a double insert - php

Question

Not sure that this is even possible. I am inserting values into two tables at the same time using multi_query. That works fine. One of the tables has an auto increment column and I need to take the last auto incremented number and insert it into the second table so like this: insert into table 1 then take the last inserted number from column X and insert it along with other data into table 2. I have played around with using SELECT LAST and INSERT INTO but so far its just doing my head in. The insert statements looks like this:
$sql= "INSERT INTO tbleClients (riskClientId, riskFacility, riskAudDate) VALUES ('$riskclient2', '$facility2', '$riskdate2');";
$sql .="SELECT LAST(riskId) FROM tbleClients;";$sql .="INSERT INTO tblRiskRegister (riskId) SELECT riskId FROM tbleClients ;";
$sql .= "INSERT INTO tblRiskRegister (riskAudDate, riskClientId, riskSessionId, RiskNewId) VALUES ('$riskdate2', '$riskclient2', '$sessionid', '$risknewid')";
Individually they all produce results but I need it to happen simultaneously. I did toy with the idea of doing them all separately but figure thats not very efficient. Any pointers would be appreciated.

Answer 1

$sql= "INSERT INTO tbleClients (riskClientId, riskFacility, riskAudDate) VALUES ('$riskclient2', '$facility2', '$riskdate2');";
After executing the above query, using mysqli_insert_id(), which gives you the last insert id.
So below query is useless.
$sql .="SELECT LAST(riskId) FROM tbleClients;";
$sql .="INSERT INTO tblRiskRegister (riskId) SELECT riskId FROM tbleClients ;";
You can insert last_insert_id in above query.
Unable to find the relation between above & below query.
$sql .= "INSERT INTO tblRiskRegister (riskAudDate, riskClientId, riskSessionId, RiskNewId) VALUES ('$riskdate2', '$riskclient2', '$sessionid', '$risknewid')";