PHP实现的mysql主从数据库状态检测功能示例

<?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';