如何在另一个链接表中插入新行的ID？

Question

I've a table with the purpose of linking two other tables with foreign keys (table 3).

table1 = id, name
table2 = id, sport
table3 = fk_table1_id, dk_table2_id

I do server side code with php and i need a way to automatic insert a row into table 3 when a row is inserted into table2.
But i dont know how to do a php query that will get the generated id of the new row in table2?
(The id of table one i do have stored in a php variable)
Im a looking at a smart stored procedure?

Answer 1

Steps to follow :

• Insert a row into table2 .
• Find the generated key from table2 and assign it to a PHP variable.

-- read this into a php variable, say, $last_key  
    SELECT LAST_INSERT_ID();

• Use the $last_key in insert statement for table3 .

Answer 2

You can Follow below Steps:

1) Make ID to AUTO_INCREMENT IN Table2

2) Create Store Procedure that work as below:

    A) INSERT Value to your Table2 :

    B) Increase ID value :  SELECT LAST_INSERT_ID() INTO VARIABLE; 

    C) Insert Value to your Table3   : use VARIABLE to get ID of Table2