Insert a multidimensional array into the database through a prepared query:
We have an array to write the form:

$dataArr:
Array
(
    [0] => Array
        (
            [0] => 2020
            [1] => 23
            [2] => 111111
        )
 
    [1] => Array
        (
            [0] => 2020
            [1] => 24
            [2] => 222222222
        )
....

Task: prepare a request and pass through binds
$array = [];
foreach ($dataArr as $k=>$v) {
// $x = 2020, the variable is predetermined in advance, does not change the essence
$array[] = [$x, $k, $v];
}
$sql = ("INSERT INTO `table` (`field`,`field`,`field`) VALUES (?,?,?)");

$db->queryBindInsert($sql,$array);

public function queryBindInsert($sql,$bind) {
        $stmt = $this->pdo->prepare($sql);
 
        if(count($bind)) {
            foreach($bind as $param => $value) {
                $c = 1;
                for ($i=0; $i<count($value); $i++) {
                    $stmt->bindValue($c++, $value[$i]);
                }
                $stmt->execute();
            }
        }
    }