redis主从数据库状态检测（php）

<?php
/**
* 检测多个主从redis数据库是否挂掉
* 建立从数据库$redis_db的二维数组，内容包含每个从服务器的配置数据
*/

header("Content-Type: text/html; charset=utf-8");
set_time_limit(0);
$redis_db = array(
'db1'=>array(
'hostname' => '127.0.0.1',
'port' => 6379,
'password' => '',
),
'db2'=>array(
'hostname' => '192.168.2.179',
'port' => 6379,
'password' => '111111',
),

);
$content = '';
foreach ($redis_db as $db_key) {

$host = $db_key['hostname'];
$port = $db_key['port'];

$redis = new Redis();
//连接本地的 Redis 服务
$status= $redis->connect($host, $port);
if(!$status) {
$content .= "redis从数据库( $host )无法连接 ！ <br/>";
continue;
}
if(!empty($db_key['password'])) {
$pass = $redis->auth($db_key['password']);
if(!$pass) {
$content .= "redis从数据库( $host )密码错误 ！ <br/>";
continue;
}
}
try {
$config = $redis->info();

if('up' == $config['master_link_status']) {

} else {
$content .= "redis从数据库( $host )挂掉了！ <br/>";
}
}
catch(RedisException $e)
{
$content .= "redis从数据库( $host )报错：" . $e->getMessage()."<br/>";
}

}

//若报错信息不为空，发送报错邮件
if(!empty($content)) {
$title = '主从redis数据库状态检测报错 ';
$content = date("Y-m-d H:i:s",time()) . "<br/>" . $content;
$sendurl = "http://localhost/api.com/test.php?title=".$title."&content=".$content;
$result = file_get_contents($sendurl);
if('ok' != $result) {
$message = date("Y-m-d H:i:s",time()).' redisSlave.php 主从redis数据库状态检测报错  邮件发送失败!'."\n";
$content = str_replace("<br/>", "\n", $content);
$message .= $content;
error_log($message,3,"error.log");
}
}