如何让这个脚本运行得更快

Question

<?php
header('Content-Type: text/html; charset=UTF-8');
$con    = mysqli_connect("localhost", "*******", "******", '*****');
$result = mysqli_query($con, "SELECT * FROM mybb_streams");
while ($row = mysqli_fetch_array($result)) {
    $json_array = json_decode(file_get_contents('https://api.twitch.tv/kraken/streams/' . strtolower($row['channel']) . '?client_id=' . $clientId), true);
    if ($json_array['stream'] != NULL) {
        // turn them into variables to prevent outside SQL injection
        $displayname = mysqli_real_escape_string($con, $json_array['stream']['channel']['display_name']);
        $title       = mysqli_real_escape_string($con, $json_array['stream']['channel']['status']);
        $game        = mysqli_real_escape_string($con, $json_array['stream']['channel']['game']);
        $viewers     = mysqli_real_escape_string($con, $json_array['stream']['viewers']);
        $preview     = mysqli_real_escape_string($con, $json_array['stream']['preview']['medium']);
        $followers   = mysqli_real_escape_string($con, $json_array['stream']['channel']['followers']);
        mysqli_query($con, "SET NAMES utf8mb4");
        mysqli_query($con, "UPDATE mybb_streams SET `online` = '1', `title` = '$title', `viewers` = '$viewers', `game` = '$game', `preview` = '$preview', `followers` = '$followers' WHERE `channel` = '" . strtolower($row['channel']) . "'") or die("A MySQL error has occurred.<br />Your Query: UPDATE `streams` SET `online` = `1`, `title` = `$title`, `viewers` = `$viewers`, `game` = `$game`, `preview` = `$preview` WHERE channel = '" . strtolower($row['channel']) . "'<br /> Error: (" . mysqli_errno($con) . ") " . mysqli_error($con));
    } else {
        mysqli_query($con, "UPDATE mybb_streams SET `online` = '0', `viewers` = '0' WHERE `channel` = '" . strtolower($row['channel']) . "'") or die("A MySQL error has occurred.<br />Your Query: UPDATE streams SET `online` = '0', `viewers` = '0' WHERE `channel` = '" . strtolower($row['channel']) . "'<br /> Error: (" . mysqli_errno($con) . ") " . mysqli_error($con));
    }

}
?>

这是我用来更新数据库上的流列表的代码。问题是，数据库越来越大，这段代码开始运行缓慢+占用我的带宽。此脚本每 3 分钟自动运行一次，有时不会更新。那么对这段代码有什么建议吗？所以它可以运行得更快、更高效？

Answer 1

我看到 2 个问题：

1 次数据库访问

我认为您应该使用 mysqli_multi_query 而不是循环执行一个查询。

2 HTTP 请求 -file_get_content-

你只能用这个打一个电话

https://api.twitch.tv/kraken/streams/' . strtolower($row['channel']) . '?client_ids=' . implode(',',$array_clientId)

这样您就可以一次获取所有 id 的所有数据。

然后你将数组解析到循环中。

试试这个 --> https://api.twitch.tv/kraken/streams/?client_ids=2,3,4 是的，它正在工作

$con    = mysqli_connect("localhost", "*******", "******", '*****');
$result = mysqli_query($con, "SELECT * FROM mybb_streams");
$array_ids;
while ($row = mysqli_fetch_array($result)) {
  $array_ids[] = $row;
}
$json_array = json_decode(file_get_contents('https://api.twitch.tv/kraken/streams/' . strtolower($row['channel']) . '?client_ids=' . implode(',',$array_ids)), true);
foreach($json_array as $user){ /* do your stuff */}