[Deprecated] mysql 대체

[convert mysql to mysqli]

mysql_connect
mysql_select_db 등 mysql 함수가 deprecated되면서 mysqli 함수로 변경해 주어야 한다.

예시)

//BAD
$connect = mysql_connect($mysql_host,$mysql_user,$mysql_pw);
mysql_select_db($mysql_db, $connect);
mysql_query($query);
mysql_affected_rows();
mysql_fetch_array($result);
mysql_escape_string($string);

//GOOD
$connect =mysqli_connect($mysql_host,$mysql_user,$mysql_pw);
mysqli_select_db($connect,$mysql_db);
mysql_query($connect,$query);
mysql_affected_rows($connect);
mysqli_fetch_array($result);
mysqli_real_escape_string($string);