如何通过PHP开发缓存提高用户体验

<?php

function get_data_from_cache($key) {
    $filename = "/tmp/" . md5($key) . ".cache";
    if (file_exists($filename)) {
        $file_content = file_get_contents($filename);
        $data = unserialize($file_content);
        if ($data['exp_time'] > time()) {
            return $data['value'];
        } else {
            unlink($filename);
        }
    }
    return null;
}

function set_data_to_cache($key, $value, $exp_time = 3600) {
    $filename = "/tmp/" . md5($key) . ".cache";
    $data = [
        'exp_time' => time() + $exp_time,
        'value' => $value,
    ];
    $file_content = serialize($data);
    file_put_contents($filename, $file_content);
}

?>

<?php

$memcache = new Memcache();
$memcache->connect("127.0.0.1", 11211) or die ("Could not connect");

// 从缓存中获取数据
function get_data_from_memcache($key) {
    global $memcache;
    $data = $memcache->get(md5($key));
    return $data ? $data : null;
}

// 将数据写入缓存
function set_data_to_memcache($key, $value, $exp_time = 3600) {
    global $memcache;
    $memcache->set(md5($key), $value, false, $exp_time);
}

?>

<?php

$redis = new Redis();
$redis->connect('127.0.0.1', 6379);
$redis->auth('passWord');

// 从缓存中获取数据
function get_data_from_redis($key) {
    global $redis;
    $data = $redis->get(md5($key));
    return $data ? $data : null;
}

// 将数据写入缓存
function set_data_to_redis($key, $value, $exp_time = 3600) {
    global $redis;
    $redis->set(md5($key), $value, $exp_time);
}

?>

composer create-project --prefer-dist laravel/laravel blog

CACHE_DRIVER=redis

...
'redis' => [
    'client' => 'predis',
    'default' => [
        'host' => env('REDIS_HOST', '127.0.0.1'),
        'password' => env('REDIS_PASSWORD', null),
        'port' => env('REDIS_PORT', 6379),
        'database' => 0,
    ],
],
...

<?php

use IlluminateSupportFacadesCache;

// 从缓存中获取数据
function get_data_from_laravel_cache($key) {
    return Cache::get(md5($key));
}

// 将数据写入缓存
function set_data_to_laravel_cache($key, $value, $exp_time = 3600) {
    Cache::put(md5($key), $value, $exp_time);
}

?>