insert query using foreach loop receiving Uncaught Error: Call to a member function execute() on boolean

Question

I am trying to insert multiple rows at once to my db, I posted a question here the other day see here. Regarding my insert query only insert one row into the db, even if it was

Answer 1

Your SQL is generated incorrectly: INSERT INTO ord_dets(Order_ID,custmer_ip,Resturant_ID,Resturant_name,City_name, Product_Id,Product_Name,Product_Price,item_sub) VALUES (...,...,....)(...,...,....)(...,...,....)(...,...,....)(...,...,....)

This is how it looks like. Fix it ad there will be no error

Solution here is to add commas betweeen values: VALUES (...,...,....),(...,...,....),(...,...,....),(...,...,....),(...,...,....)

UPD: Actually I can't see where you add $query_parts to your query string

UPD2: this is how it should look to avoid sql injections:

$_query = "INSERT INTO ord_dets(Order_ID,custmer_ip,Resturant_ID,Resturant_name,City_name, Product_Id,Product_Name,Product_Price,item_sub) VALUES (?,?,?,?,?,?,?,?,?)";
$stmt = $dbc->prepare($_query);

for($x=0;$x<count($OI); $x++){
    if (!$query_run->execute([$OI[$x] , $ip[$x], $_SESSION['rest_id'][$x] ,
          $rest_name[$x] , $City_name[$x] , $Product_Id[$x] ,
          $product_name[$x] , $prod_price[$x] ,$item_sub[$x]])) )
    {
        insertError = "There was an error inserting data: " . $query_run->error; 
          print "affected rows:" . $query_run->affected_rows;
    }
}     

Answer 2

change it like this to separated it with coma.

$_query = "INSERT INTO ord_dets(Order_ID,custmer_ip,Resturant_ID,Resturant_name,City_name,
        Product_Id,Product_Name,Product_Price,item_sub) 
VALUES ";
        $_query_parts  = array();
        $sep ="";
        for($x=0;$x<count($OI); $x++){
        $_query_parts  = "$sep('" . $OI[$x] . "', '" . $ip[$x] . "','" . $_SESSION['rest_id'][$x] . "','" . $rest_name[$x] . "',
            '" . $City_name[$x] . "','" . $Product_Id[$x] . "','" . $product_name[$x] . "','" . $prod_price[$x] . "','" . $item_sub[$x] . "')";
        $sep=",";
        }
      $query_run = $dbc->prepare($_query);
       echo $_query;

        if (!$query_run->execute()) {
            $insertError = "There was an error inserting data: " . $query_run->error;
      print "affected rows:" . $query_run->affected_rows; //how many records affected?         

    }
  }