一個(gè)php mysql數(shù)據(jù)庫(kù)備份類，分享給大家。

1，mysql數(shù)據(jù)庫(kù)備份類 backdata.class.php：

<?php
/*
*
* @ Mysql備份數(shù)據(jù)類
* @by bbs.it-home.org
*/
class backupData{
    private    $mysql_link;//鏈接標(biāo)識(shí)
    private    $dbName;    //數(shù)據(jù)庫(kù)名
    private    $dataDir;     //數(shù)據(jù)所要存放的目錄
    private    $tableNames;//表名

    public function __construct($mysql_link){
         $this->mysql_link = $mysql_link;
    }
    public function backupTables($dbName,$dataDir,$tableNames){//開始備份
        $this->dbName  = $dbName;
        $this->dataDir  = $dataDir;
        $this->tableNames = $tableNames;
        $tables=$this->delarray($this->tableNames);
        $sqls='';
        foreach($tables as $tablename){
            if($tablename==''){//表不存在時(shí)
                continue;
            }
            
            //************************以下是形成SQL的前半部分**************
            //如果存在表，就先刪除
            $sqls .= "DROP TABLE IF EXISTS $tablename;\n";
            //讀取表結(jié)構(gòu)
            $rs = mysql_query("SHOW CREATE TABLE $tablename",$this->mysql_link);  
            $row=mysql_fetch_row($rs);
            //獲得表結(jié)構(gòu)組成SQL
            $sqls.=$row['1'].";\n\n";
            unset($rs);
            unset($row);
            
            //************************以下是形成SQL的后半部分**************
            //查尋出表中的所有數(shù)據(jù)
            $rs=mysql_query("select * from $tablename",$this->mysql_link);
            //表的字段個(gè)數(shù)
            $field=mysql_num_fields($rs);
            //形成此種SQL語(yǔ)句:"INSERT INTO `groups` VALUES('1499e0ca25988d','主任','','0');"
            while($rows=mysql_fetch_row($rs)){
                $comma='';//逗號(hào)
                $sqls.="INSERT INTO `$tablename` VALUES(";
                for($i=0;$i<$field;$i++){
                    $sqls.=$comma."'".$rows[$i]."'";
                    $comma=',';
                }
                $sqls.=");\n\n\n";
            }
        }
        $backfilepath=$this->dataDir.date("Ymdhis",time()).'.sql';
        
        //寫入文件
        $filehandle = fopen($backfilepath, "w");
        fwrite($filehandle, $sqls);
        fclose($filehandle);
    }
    private function delarray($array){    //處理傳入進(jìn)來(lái)的數(shù)組
        foreach($array as $tables){
            if($tables=='*'){    //所有的表(獲得表名時(shí)不能按常規(guī)方式來(lái)組成一個(gè)數(shù)組)
                $newtables=mysql_list_tables($this->dbName,$this->mysql_link);
                $tableList = array();
                for ($i = 0; $i < mysql_numrows($newtables); $i++){
                    array_push($tableList,mysql_tablename($newtables, $i));
                }
                $tableList=$tableList;
            }else{
                $tableList=$array;
                break;
            }
        }
        return $tableList;
    }
}
?>

2，調(diào)用方法：