How to add data to mysql

About how to add data INSERTINTOroom (roomid, name, id1, id2) values ('1', '20170101', '$ _ POST [id1]', '$ _ POST [id2]') $ _ POST [id1], $ _ POST [id2] indicates a value, not an ID. how can this problem be solved ?, $ _ POST [id1], $ _ POST [about adding data to mysql
Insert into room (roomid, name, id1, id2) values ('1', '000000', '$ _ POST [id1]', '$ _ POST [id2]')

$ _ POST [id1], $ _ POST [id2] is a value, not an ID. how can this problem be solved?

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$ _ POST [id1], $ _ POST [id2] indicates that the value is not an id concept.

Is the value in SQL a variable name, not a value.
Insert into room (roomid, name, id1, id2) values ('1', '000000', '{$ _ POST [id1]}', '{$ _ POST [id2]}')

Or

"Insert into room (roomid, name, id1, id2) values ('1', '123 ','". $ _ POST [id1]. "','". $ _ POST [id2]. "')"
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What does it mean ??
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The IDs of the two tables cannot be inserted in an insert statement at the same time.
If the id is set to auto_increment, you do not need to insert the id, and duplicate values cannot be inserted.
If not set to auto-growth:
SQL = "insert into room (roomid, name, id1) values (". $ _ POST ['roomid']. ",'". $ _ POST ['name']. "',". $ _ POST ['id1']. ")";
You can query multiple tables.

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$ _ POST [id1], $ _ POST [id2] is his value