mysql - php import csv file contents into database

$file = fopen('xxx.csv', 'r');
while($data = fgetcsv($file)) {
    $result [] = $data;
} 
//$result数组就是CVS的内容啦，把$result存到数据库就好。
fclose($file);

query('SET AUTOCOMMIT=0');
$db->query('START TRANSACTION');
foreach($arr as $row) {
    $stmt = $db->prepare('INSERT INTO posts (id, post_title, post_content) VALUES (?,?,?)');
    $stmt->bind_param('iss', $row[0], $row[1], $row[2]); //这里假设每行内容分别为ID,标题和内容
    $stmt->execute();
    //如果插入失败,改为更新
    if($stmt->affected_rows == 0 || $stmt->affected_rows == -1) {
        $stmt = $db->prepare('UPDATE posts SET post_title = ?, post_content = ? WHERE id = ?');
        $stmt->bind_param('ssi', $row[1], $row[2], $row[0]);
        $stmt->execute();
        if($stmt->affected_rows == 0 || $stmt->affected_rows == -1) {
            echo 'Import '.$row[0].' failed!'."\n";
        }
    }
}
$db->query('COMMIT');
$db->query('SET AUTOCOMMIT=1');