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PHP cache instance using redis

不言Original: 2018-04-13 10:28:222803browse

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(&#39;127.0.0.1&#39;,6379);
$redis->auth(&#39;12345&#39;); 
if($redis->get(&#39;inner&#39;)==&#39;yes&#39; || !$redis->get(&#39;inner&#39;)){
	//第一次进入,需要缓存
	//连接数据库进行查询
	$db = new mysqli(&#39;127.0.0.1&#39;,&#39;root&#39;,&#39;root&#39;,&#39;table&#39;);
	$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(&#39;news&#39;);//把键值删除，防止重复
    $redis->lPush(&#39;news&#39;, $json);
    $redis->set(&#39;inner&#39;, &#39;no&#39;,60); //设置键值有效期为60秒
}else{
	//从redis中取出数据
	$json=$redis->lRange(&#39;news&#39;, 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[&#39;title&#39;];  ?></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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