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!'."\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';

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希望本文所述对大家PHP程序设计有所帮助。