php - 数组导入MYSQL

Question

我举了几个例子，但没有什么我能掌握的。我有以下代码， echo 有效但插入无效。我相信我应该爆炸这些？不确定，但也许有人可以用我自己的例子给我提示。

$con=mysqli_connect(localhost,"username","password","db");


// Check connection
if (mysqli_connect_errno())
 {
 echo "Failed to connect to MySQL: " . mysqli_connect_error();
 }

$deletetable = $con->prepare('TRUNCATE TABLE twitch_streams');
$deletetable->execute();
$deletetable->close();

$result = $con->prepare("SELECT field_value
FROM xf_user_field_value
WHERE field_id = 'twitch'
AND field_value != ''");

$result->bind_result($twitchfield);

while($result->fetch())
{
printf("%s\n", $twitchfield);
$username[] = $twitchfield;
$data =    json_decode(file_get_contents('http://api.justin.tv/api/stream/l   ist.json?channel=' . $username[0]));
$viewer[] = $data[0]->channel_count;


$insert = $con->prepare("INSERT INTO twitch_streams (twitchuser, viewercount)
VALUES (?, ?)");
$insert = bind_param('si', $twitchuser, $viewercount);

$twitchuser = $username[0];
$viewercount = $viewer[0];

$insert->execute();

echo $twitchuser;
echo $viewercount;
$insert->close();
  }

$result->close();$deletetable = $con->prepare('TRUNCATE TABLE twitch_streams');
$deletetable->execute();
$deletetable->close();

$result = $con->prepare("SELECT field_value
FROM xf_user_field_value
WHERE field_id = twitch
AND field_value != ''");

$result->bind_result($twitchfield);

while($result->fetch())
  {
   printf("%s\n", $twitchfield);
   $username[] = $twitchfield;
   $data =    json_decode(file_get_contents('http://api.justin.tv/api/stream/l   ist.json?      channel=' . $username[0]));
$viewer[] = $data[0]->channel_count;


$insert = $con->prepare("INSERT INTO twitch_streams (twitchuser, viewercount)
VALUES (?, ?)");
$insert = bind_param('si', $twitchuser, $viewercount);

$twitchuser = $username[0];
$viewercount = $viewer[0];

$insert->execute();

echo $twitchuser;
echo $viewercount;
$insert->close();
  }

$result->close();
mysqli_close($con);

Answer 1

您的字符串值周围缺少引号:

"INSERT INTO twitch_streams (twitchuser, viewercount)
VALUES ($username[0], $viewer[0])"

应该是

"INSERT INTO twitch_streams (twitchuser, viewercount)
VALUES ('$username[0]', '$viewer[0]')"

如果您在代码中添加错误处理，您将很容易发现此错误。考虑使用 mysqli_error() .

$result = mysqli_query($con,"INSERT INTO twitch_streams (twitchuser, viewercount)
VALUES ('$username[0]', '$viewer[0]')");
if (!result) {
    // This should be done better than this
    echo mysqli_error();
    exit;
}

因为我无法从您的代码中得知 $data[0]->channel_count 的来源是什么，我还要提到您至少应该使用 mysqli_real_escape_string() 来转义您的插入变量.更好的是，使用 prepared statements .