PHPRunner manual
Before deleting a record check for related records

Before deleting a record in the Orders table check for related items in the OrderDetails table. function BeforeDelete($where) {   // Parameters:   // where - string with WHERE clause pointing to record to be deleted.     $rs = db_query("select * from OrderDetails where ".$where, $conn);   if(db_numrows($rs) > 0)     return false;     else    return true; }