There is a DB, it has 3 tables (table1, table2, table3).
Table1 and table2 are glued with join.
Table1 have columns (id, name),
Table2 (id, name),
Table3 (id, url).
Table1 has a one-to-many relation to table2.
Table2 has a one-to-one relationship with table3.
In html there are checkboxes, when selected, the name is taken from table1.
So, how to make a request to the database on the PDO, so that when selecting one or several checkboxes (name from table1), the corresponding pictures are output from table3?