タグ: PHP+MySQL

    function DBconnect()
    {
        $DBlink = mysqli_connect('yourdbhost.work', 'username', 'password');

        if (!$DBlink) {
            die('MYSQL接続エラー' . mysqli_error($DBlink));
        }

        mysqli_set_charset($DBlink, 'utf8');

        return $DBlink;
    }

    function DBselect($selectDB, $DBlink)
    {
        $db_selected = mysqli_select_db($DBlink, $selectDB);

        if (!$db_selected) {
            die($selectDB . 'データベース選択エラー' . mysqli_error($DBlink));
        }
    }

    function RunSQL($DBlink, $sql)
    {
        $result = mysqli_query($DBlink, $sql);

        if (!$result) {
            die('クエリーのエラー' . mysqli_error($DBlink));
        }

        return $result;
    }


    function h(string $string): string
    {
        return $string;
    }


    function myfunction()
    {

            $DBlink = DBconnect();
            DBselect('database', $DBlink);
            $records = RunSQL(
                $DBlink,
                "SELECT " .
                "*" .
                "FROM `table`" .
                "ORDER BY `key`;"
            );

            $result = [];

            while ($row = mysqli_fetch_array($records)) {
                //ここに処理を
            }
            return $result;

            mysqli_close($RDBlink);
    };

define('DSN', 'mysql:host=yourdbhost.work;dbname=dbname;charset=utf8');
define('DB_USERNAME', 'username');
define('DB_PASSWORD', 'password');

try{
    $dbh = new PDO(DSN, DB_USERNAME, DB_PASSWORD,
     array(
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_EMULATE_PREPARES => false,
        )
    );

    $prepare = $dbh->prepare('SELECT * FROM table ORDER BY key');
    $prepare->execute();

    $result = $prepare->fetchAll(PDO::FETCH_ASSOC);

    foreach($result as $r){

      //ここで処理を

    }


} catch (PDOException $e){
    $error = $e->getMessage();
}