php PDO的预处理语句有哪些

$tis = $conn->prepare("INSERT INTO STUDENTS(name, age) values(?, ?)");

$tis->bindValue(1,'mike');

$tis->bindValue(2,22);

$tis->execute();

$name='Rishabh'; $age=20;

$tis = $conn->prepare("INSERT INTO STUDENTS(name, age) values(?, ?)");

$tis->bindParam(1,$name);

$tis->bindParam(2,$age);

$tis->execute();