PHP-FPM performance optimization example: methods to improve website data caching efficiency

PHP-FPM performance optimization example: Methods to improve website data caching efficiency

With the rapid development of the Internet, the number of visits to the website is also increasing, so Improving website performance has become an important issue. As a commonly used PHP interpreter, PHP-FPM is particularly important for website performance optimization. This article will introduce some methods to improve the efficiency of website data caching and provide specific code examples.

1. Using cache extensions

In PHP, commonly used cache extensions include Redis, Memcached, etc. These extensions store data in memory and increase the speed at which data can be read. When using cache extensions, you can cache some frequently accessed data to avoid reading it from the database every time. The following is a sample code using Redis as a cache:

// 连接Redis服务器
$redis = new Redis();
$redis->connect('127.0.0.1', 6379);

// 检查缓存中是否存在数据
if ($redis->exists('cache_key')) {
    $result = $redis->get('cache_key');
} else {
    // 从数据库中读取数据
    $result = db_query('SELECT * FROM table');
  
    // 将数据存入缓存
    $redis->set('cache_key', $result, 60); //设置过期时间为60秒
}

// 使用数据
echo $result;

2. Using caching proxy

If the website has a large amount of data, the efficiency of reading data directly from the database will be lower. At this time, you can use a caching proxy to store the database query results in the cache, and the next query will read the data directly from the cache. Commonly used caching proxies include MySQL cache, Nginx cache, etc. The following is a sample code using MySQL caching:

// 打开MySQL查询缓存
$query = "SELECT SQL_CACHE * FROM table";
$result = db_query($query);
while($row = mysql_fetch_assoc($result)) {}

// 使用数据
foreach($row as $key=>$value){
    echo $value;
}

3. Caching page fragments

In website development, some page fragments may be loaded frequently, but some of them Content may not change frequently. At this time, this part of the content that does not change can be cached to reduce the pressure on the server. The following is a sample code for caching a page fragment:

// 检查缓存文件是否存在
if (file_exists('cache.html')) {
    // 从缓存文件中读取内容
    $content = file_get_contents('cache.html');
} else {
    // 生成页面内容，并存入缓存文件
    $content = generate_content();
    file_put_contents('cache.html', $content);
}

// 输出页面内容
echo $content;

4. Using the cache control header

Using the cache control header can tell the browser the validity period of the cached file. If the cached file is not After expiration, the browser will read the file directly from the cache instead of re-downloading it. The following is a sample code for setting the cache control header:

// 设置缓存有效期为1小时
$expires = 60 * 60;
header("Pragma: public");
header("Cache-Control: maxage=".$expires);
header('Expires: ' . gmdate("D, d M Y H:i:s", time() + $expires) . ' GMT');

// 输出页面内容
echo $content;

Through the above cache optimization method, the data caching efficiency of the website can be effectively improved and the load of the server can be reduced. Of course, for each website, specific optimization methods still need to be determined based on different circumstances. Hope the above content is helpful to you.

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