mysql主从数据库状态检测（php）

实例：

<?php
/**
 * 检测多个主从数据库是否挂掉
 * 建立从数据库$slave_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);
$slave_db = array(
    'db1'=>array(
        'hostname' => '127.0.0.1',
        'port' => 3306,
        'database' => 'test',
        'username' => 'root',
        'password' => '111111',
        'charset' => 'utf8',
    ),
    'db2'=>array(
        'hostname' => '127.0.0.2',
        'port' => 3306,
        'database' => 'test',
        'username' => 'root',
        'password' => '111111',
        'charset' => 'utf8',
    ),

);

$content = '';
foreach ($slave_db as $db_key) {
    $host = $db_key['hostname'];
    $port = $db_key['port'];
    $db_user = $db_key['username'];
    $db_pass = $db_key['password'];

    $slave_link = mysql_connect($host,$db_user,$db_pass);
    if(mysql_errno()) {
        $content .= "从数据库( $host )无法连接 ！ <br/>";
        $content .= mysql_error() . "<br/>";
        continue;
    }

    $sql = "show slave status";
    $result = mysql_query($sql, $slave_link);
    $row = mysql_fetch_assoc($result);

    $Slave_IO_Running = $row['Slave_IO_Running'];
    $Slave_SQL_Running = $row['Slave_SQL_Running'];

    if ('Yes' == $Slave_IO_Running && 'Yes' == $Slave_SQL_Running) {

    } else {
        $content .= "从数据库( $host )挂掉了！ <br/>";
    }
    mysql_free_result($result);
    mysql_close($slave_link);

}

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

<?php
$title = $_GET['title'];
$content = $_GET['content'];
$content = str_replace("<br/>", "\n", $content);
error_log($title."\n",3,'error.log');
error_log($content."\n",3,'error.log');
echo 'ok';