[PHP] MySQL 연결하기 : mysqli, PDO

//mysqli 방식

<?php 
   $conn = mysqli_connect("localhost", "root", "111111");

   if ($conn) {
          echo "connect : succeed<br>";
      } else {
          echo "disconnect : error<br>";
      }
?>


//PDO 방식
<?php
    try{
        $conn = new PDO("mysql:host=localhost;", "root", "111111");
        echo "Connection succeed";
    }catch(PDOException $e){
        echo "Connection failed: " . $e->getMessage();
    }
?>