PHP SQLite insert record and get lastInsertId()

$my_conn = new PDO('sqlite:my_student.sqlite3');

Unique ID by lastInsertedId()

// Create (connect to) SQLite database in file
$my_conn = new PDO('sqlite:my_student.sqlite3');
// Set errormode to exceptions
  $my_conn->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
 
////////////Collect  data/////////////
$name='plus2net'; 
$mark=50;               
$class='Four';    
$sex='Female';  

///////// End of data collection /// 

$sql=$my_conn->prepare("INSERT INTO student (name,class,mark,sex) 
	values(:name,:class,:mark,:sex)");
$sql->bindParam(':name',$name,PDO::PARAM_STR, 25);
$sql->bindParam(':class',$class,PDO::PARAM_STR, 25);
$sql->bindParam(':mark',$mark,PDO::PARAM_INT, 15);
$sql->bindParam(':sex',$sex,PDO::PARAM_STR, 10);

if($sql->execute()){
echo "Successfully added record ";
echo "<br><br>ID of the new record is  : ".$my_conn->lastInsertId();
}
else{
print_r($sql->errorInfo()); // if any error is there it will be posted
$msg=" Database problem, please contact site admin ";
}

Successfully added record

ID of the new record is : 36

Adding multiple records

$query="INSERT INTO `student` 
(`id`, `name`, `class`, `mark`, `sex`) VALUES
(1, 'John Deo', 'Four', 75, 'female'),
(2, 'Max Ruin', 'Three', 85, 'male'),
(3, 'Arnold', 'Three', 55, 'male'),
(4, 'Krish Star', 'Four', 60, 'female'),
(5, 'John Mike', 'Four', 60, 'female'),

(35, 'Rows Noump', 'Six', 88, 'female');";


$sql=$my_conn->prepare($query);
$sql->execute();

echo "<br><br> Number of records added  : ".$sql->rowCount();

Number or records added : 35