php查询mysql并缓存到redis

首先安装redis，并在php环境中开启php_redis扩展。

下面不多说了，直接上代码

<?php   
$redis = new redis();  
$redis->connect('127.0.0.1', 6379);  
$blog = $redis->get('redisrow');  
//如果$blog数组为空，则去数据库中查询，并加入到redis中  
if(empty($blog)){  
    echo "mysql";  
    // Connect mysql server  
    $mysql = new PDO("mysql:host=localhost;dbname=blog","root","",array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8"));   
    $rs = $mysql -> query("select * from tbl_post");  
    //$row = $rs -> fetch();  
    $i=0;  
    while($row = $rs -> fetch()){  
        $rows[$i]['title']=$row['title'];  
        $rows[$i]['content']=$row['content'];  
        $i=$i+1;  
    }  
    print_r($rows);  
    $redisrow = json_encode($rows);  
    $redis->setex('redisrow','100',$redisrow);  
}else{  
    $redisblog = json_decode($blog);  
    echo "redis";  
    print_r($redisblog);  
}  
?>