PHP cache instance using redis
The content shared with you in this article is a caching example of PHP using redis. It has certain reference value. Friends in need can refer to it.
I just started to study redis recently and wrote a PHP application. A small example of redis caching, don’t complain if you don’t like it
The general idea is as follows:
Mainly cache news
First determine if it is the first visit, then Query the database and store it in redis; if not, read the data directly from redis
I set up an inner to determine whether it is the first access, and set the validity period of the inner to 60 seconds (for example News needs to be real-time)
The specific code is as follows:
<?php
//实例化redis
$redis = new \Redis();
//连接redis
$redis->connect('127.0.0.1',6379);
$redis->auth('12345');
if($redis->get('inner')=='yes' || !$redis->get('inner')){
//第一次进入,需要缓存
//连接数据库进行查询
$db = new mysqli('127.0.0.1','root','root','table');
$sql = "select * from newsinfo";
$res = $db->query($sql);
while($new = mysqli_fetch_assoc($res)){
$news[] = $new;
}
//将数据存入redis的list中
$json=json_encode($news);
$redis->del('news');//把键值删除，防止重复
$redis->lPush('news', $json);
$redis->set('inner', 'no',60); //设置键值有效期为60秒
}else{
//从redis中取出数据
$json=$redis->lRange('news', 0, -1);
$news=json_decode($json[0],true);
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>redis缓存实例</title>
</head>
<body>
<?php foreach ($news as $k => $v) { ?>
<li><?php echo $v['title']; ?></li>
<?php } ?>
</body>
</html>The response time when directly accessing the database is
And the The response time of the second visit is
The response time is significantly reduced
Related recommendations:
About the Redis command in PHP Part summary
php adds redis extension graphic and text explanation
30 code examples of commonly used methods of operating redis in php
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