PDO Prepared Inserts multiple rows in single query

Question

I am currently using this type of SQL on MySQL to insert multiple rows of values in one single query:

INSERT INTO `tbl` (`key1`,`key2`) VALUES (\'r1v1\',\'r1         


        

Answer 1

what about something like this:

        if(count($types_of_values)>0){
         $uid = 1;
         $x = 0;
         $sql = "";
         $values = array();
          foreach($types_of_values as $k=>$v){
            $sql .= "(:id_$k,:kind_of_val_$k), ";
            $values[":id_$k"] = $uid;
            $values[":kind_of_val_$k"] = $v;
          }
         $sql = substr($sql,0,-2);
         $query = "INSERT INTO table (id,value_type) VALUES $sql";
         $res = $this->db->prepare($query);
         $res->execute($values);            
        }

The idea behind this is to cycle through your array values, adding "id numbers" to each loop for your prepared statement placeholders while at the same time, you add the values to your array for the binding parameters. If you don't like using the "key" index from the array, you could add $i=0, and $i++ inside the loop. Either works in this example, even if you have associative arrays with named keys, it would still work providing the keys were unique. With a little work it would be fine for nested arrays too..

**Note that substr strips the $sql variables last space and comma, if you don't have a space you'd need to change this to -1 rather than -2.