PHP实现的mysql主从数据库状态检测功能示例

本文实例讲述了PHP实现的mysql主从数据库状态检测功能。分享给大家供大家参考，具体如下：

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!"."
";
    $content = str_replace("<br/>", "
", $content);
    $message .= $content;
    error_log($message,3,"error.log");
  }
}

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

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