用php实现的备份MySQL数据库的代码，需要的朋友可以参考下。 <?php $cfg_dbhost ='localhost';//mysql主机 $cfg_dbname ='sq_test';//数据库名 $cfg_dbuser ='root';//数据库用户名 $cfg_dbpwd ='jb51.net';//数据库用户密码 $cfg_db_language ='utf8';//数据库编码 class dbmysql{ public static $dbhost = 'localhost'; public static $dbname; public static $dbuser = 'root'; public static $dbpass; public static $charset = 'utf8'; public static $DB = null; public $querycount = 0; public function __construct() { self::$dbhost = $GLOBALS['cfg_dbhost']; self::$dbname = $GLOBALS['cfg_dbname']; self::$dbuser = $GLOBALS['cfg_dbuser']; self::$dbpass = $GLOBALS['cfg_dbpwd']; self::$charset= $GLOBALS['cfg_db_language']; self::connect(); } public function connect(){ self::$DB=mysql_connect(self::$dbhost,self::$dbuser,self::$dbpass); if(!self::$DB){ self::sqlError('无法连接服务器!'.self::mysqlerror);exit("无法连接服务器!");; } if(!mysql_select_db(self::$dbname)){ self::sqlError('无法连接数据库('.self::$dbname.')!'.self::mysqlerror);exit("无法连接数据库!"); } mysql_query("SET NAMES '".self::$charset."', character_set_client=binary, sql_mode='';",self::$DB); } private function mysqlerror(){ return mysql_error(); } public function getTablesName(){ $res = mysql_query('SHOW TABLES FROM '.self::$dbname,self::$DB); $tables=array(); while ($row=mysql_fetch_row($res))$tables[]=$row[0]; mysql_free_result($res); return $tables; } public function getFields($table){ $res=mysql_query('DESCRIBE '.$table,self::$DB); $tables=array(); while($row=mysql_fetch_row($res))$tables[]=$row[0]; mysql_free_result($res); return $tables; } public function fetch_array($sql){ $res=mysql_query($sql,self::$DB); $r=mysql_fetch_array($res); mysql_free_result($res); return $r; } public function fetch_assoc($sql){ $q3=mysql_query($sql,self::$DB); $ra=array(); while($data=mysql_fetch_assoc($q3)){ $ra[]=$data; } mysql_free_result($q3); return $ra; } private function sqlError($message='',$info ='',$sql=''){//保存错误信息到文件 echo "{".$message."<br/>DATE: ".date('Y-n-j H:i:s')."<br/>ERROR: ".$info."<br/>SQL: ".$sql."<br/>}<br/>"; } public function close(){ self::$DB =null; } public function __destruct() { self::close(); } } function makedir($dirpath){ if(!$dirpath) return 0; $dirpath=str_replace("\\","/",$dirpath); $mdir=""; foreach(explode("/",$dirpath) as $val){ $mdir.=$val."/"; if($val==".."||$val==".")continue; if(!is_dir($mdir)&&!file_exists($mdir)){ if(!@mkdir($mdir,0755)){ exit("创建目录 [".$mdir."]失败."); } } } return true; } function delDirAndFile($dirName){ if($handle=opendir($dirName)){ while(false!==($item = readdir($handle))){ if($item !="."&&$item!=".."){ if(is_dir( "$dirName/$item")){ delDirAndFile( "$dirName/$item"); }else{ unlink("$dirName/$item"); } } } closedir( $handle ); if( rmdir( $dirName ) )echo "成功删除目录： $dirName<br/>\n"; } } function filein($filename="databak/",$table='',$mysql=''){ $fp = fopen($filename.'/'.$table.'.sql','w'); fputs($fp,$mysql); fclose($fp); } header("Content-Type:text/html;charset=utf-8"); $db=new dbmysql(); $table=$db->getTablesName(); $filename="databak/".date("Ymd"); $url=getcwd()."/databak/"; $handle = opendir($url); while(false!==($file = readdir($handle))){ if ($file!="."&&$file!=".."&&is_dir($url."/".$file)) { if(date("Ymd")-$file>5){delDirAndFile($url."/".$file);}; } } makedir($filename); foreach($table as $t){ $s1=$db->fetch_array("show create table `$t`"); $mysql="\r\nDROP TABLE IF EXISTS `$t`;\r\n".$s1['Create Table'].";\r\n\r\n"; $a1=$db->fetch_assoc("select * from `$t`"); foreach ($a1 as $data){ $vals=array_values($data); $vals=array_map('addslashes',$vals); $vals=join("','",$vals); $vals="'".$vals."'"; $mysql.="INSERT INTO `$t` VALUES ($vals);\r\n"; } $mysql.="\r\n"; filein($filename,$t,$mysql); } echo "数据备份成功,生成备份文件 　　".getcwd()."/".$filename."/<br/>程序自动清理5天以前的备份"; ?>