php 备份数据库代码(生成word,excel,json,xml,sql)_php技巧

单表备份
代码：

复制代码 代码如下:

class Db   
{   
    var $conn;   

    function Db($host="localhost",$user="root",$pass="root",$db="test")   
    {   
      if(!$this->conn=mysql_connect($host,$user,$pass))   
      die("can't connect to mysql sever");   
      mysql_select_db($db,$this->conn);   
      mysql_query("SET NAMES 'UTF-8'");   
    }   

    function execute($sql)   
    {   
       return mysql_query($sql,$this->conn);   
    }   

    function findCount($sql)   
    {   
        $result=$this->execute($sql);   
        return mysql_num_rows($result);   
    }   

    function findBySql($sql)   
    {   
        $array=array();   
        $result=mysql_query($sql);   
        $i=0;   
        while($row=mysql_fetch_assoc($result))   
           {   
          $array[$i]=$row;    
       $i++;   
           }   
        return $array;   
    }   

    //$con的几种情况   
    //空：返回全部记录   
    //array：eg. array('id'=>'1') 返回id=1的记录   
    //string :eg. 'id=1' 返回id=1的记录   
    function toExtJson($table,$start="0",$limit="10",$cons="")   
    {   
       $sql=$this->generateSql($table,$cons);   
       $totalNum=$this->findCount($sql);   
       $result=$this->findBySql($sql." LIMIT ".$start." ,".$limit);   
       $resultNum = count($result);//当前结果数   
      $str="";   
      $str.= "{";   
      $str.= "'totalCount':'$totalNum',";   
      $str.="'rows':";   
      $str.="[";   
      for($i=0;$i       $str.="{";    
       $count=count($result[$i]);   
       $j=1;   
       foreach($result[$i] as $key=>$val)   
       {   
       if($j       {   
       $str.="'".$key."':'".$val."',";   
       }   
       elseif($j==$count)   
       {   
       $str.="'".$key."':'".$val."'";   
       }   
       $j++;   
                }   

       $str.="}";   
       if ($i != $resultNum-1) {   
                 $str.= ",";   
             }   
      }   
      $str.="]";   
      $str.="}";   
      return $str;     
    }   

    function generateSql($table,$cons)   
    {   
        $sql="";//sql条件   
       $sql="select * from ".$table;   
       if($cons!="")   
       {   
       if(is_array($cons))   
       {   
         $k=0;   
         foreach($cons as $key=>$val)   
      {   
      if($k==0)   
      {   
      $sql.="where '";   
      $sql.=$key;   
      $sql.="'='";   
      $sql.=$val."'";   
      }else 
      {   
      $sql.="and '";   
      $sql.=$key;   
      $sql.="'='";   
      $sql.=$val."'";   
      }   
      $k++;   
      }   
       }else 
       {   
       $sql.=" where ".$cons;   
       }   
       }   
       return $sql;   
    }   

    function toExtXml($table,$start="0",$limit="10",$cons="")   
    {   
       $sql=$this->generateSql($table,$cons);   
       $totalNum=$this->findCount($sql);   
       $result=$this->findBySql($sql." LIMIT ".$start." ,".$limit);   
       $resultNum = count($result);//当前结果数   
       header("Content-Type: text/xml");   
       $xml="\n";   
       $xml.="\n";   
       $xml.="\t".$totalNum."\n";   
       $xml.="\t\n";   
       for($i=0;$i       $xml.="\t\t\n";   
       foreach($result[$i] as $key=>$val)   
       $xml.="\t\t\t".$val."".$key.">\n";   
       $xml.="\t\t\n";   
       }   
        $xml.="\t\n";   
        $xml.="\n";   
        return $xml;   
    }   

    //输出word表格   
    function toWord($table,$mapping,$fileName)   
    {   
       header('Content-type: application/doc');    
          header('Content-Disposition: attachment; filename="'.$fileName.'.doc"');    
          echo '           xmlns:w="urn:schemas-microsoft-com:office:word"   
           xmlns="[url=http://www.w3.org/TR/REC-html40]http://www.w3.org/TR/REC-html40[/url]">   
           
              
           
           
        ';    
        echo'';   
        if(is_array($mapping))   
        {   
          foreach($mapping as $key=>$val)   
       echo'';   
        }   
        echo'';   
        $results=$this->findBySql('select * from '.$table);   
        foreach($results as $result)   
        {   
          echo'';   
          foreach($result as $key=>$val)   
       echo'';   
       echo'';   
        }   
        echo'

'.$val.'

'.$val.'

';   
        echo'';   
        echo'';   
    }   

    function toExcel($table,$mapping,$fileName)   
    {   
      header("Content-type:application/vnd.ms-excel");   
         header("Content-Disposition:filename=".$fileName.".xls");   
      echo'           xmlns:x="urn:schemas-microsoft-com:office:excel" 
           xmlns="[url=http://www.w3.org/TR/REC-html40]http://www.w3.org/TR/REC-html40[/url]">   
              
              
              
              
              
        ';    
        echo'';   
           echo'';   
        if(is_array($mapping))   
        {   
          foreach($mapping as $key=>$val)   
       echo'';   
        }   
        echo'';   
        $results=$this->findBySql('select * from '.$table);   
        foreach($results as $result)   
        {   
          echo'';   
          foreach($result as $key=>$val)   
       echo'';   
       echo'';   
        }   
        echo'

'.$val.'

'.$val.'

';   
        echo'';   
        echo'';   
    }   

    function Backup($table)   
    {   
      if(is_array ($table))   
      {   
       $str="";   
       foreach($table as $tab)   
       $str.=$this->get_table_content($tab);   
       return $str;   
      }else{   
       return $this->get_table_content($table);   
      }   
    }   

    function Backuptofile($table,$file)   
    {   
      header("Content-disposition: filename=$file.sql");//所保存的文件名   
      header("Content-type: application/octetstream");   
      header("Pragma: no-cache");   
      header("Expires: 0");   
      if(is_array ($table))   
      {   
       $str="";   
       foreach($table as $tab)   
       $str.=$this->get_table_content($tab);   
       echo $str;   
      }else{   
       echo $this->get_table_content($table);   
      }   
    }   

    function Restore($table,$file="",$content="")   
    {   
      //排除file，content都为空或者都不为空的情况   
      if(($file==""&&$content=="")||($file!=""&&$content!=""))   
      echo"参数错误";   
      $this->truncate($table);   
      if($file!="")   
      {   
       if($this->RestoreFromFile($file))   
       return true;   
       else 
       return false;   
      }   
      if($content!="")   
      {   
       if($this->RestoreFromContent($content))   
       return true;   
       else 
       return false;   
      }   
    }   

    //清空表，以便恢复数据   
    function truncate($table)   
    {   
      if(is_array ($table))   
      {   
       $str="";   
       foreach($table as $tab)   
       $this->execute("TRUNCATE TABLE $tab");   
      }else{   
       $this->execute("TRUNCATE TABLE $table");   
      }   
    }   

    function get_table_content($table)   
    {   
      $results=$this->findBySql("select * from $table");   
      $temp = "";   
      $crlf="
";   
      foreach($results as $result)   
      {   

       /*(";  
      foreach($result as $key=>$val)  
      {  
       $schema_insert .= " `".$key."`,";  
      }  
      $schema_insert = ereg_replace(",$", "", $schema_insert);  
      $schema_insert .= ")   
      */ 
      $schema_insert = "INSERT INTO  $table VALUES (";   
      foreach($result as $key=>$val)   
      {   
       if($val != "")   
       $schema_insert .= " '".addslashes($val)."',";   
       else 
       $schema_insert .= "NULL,";   
      }   
      $schema_insert = ereg_replace(",$", "", $schema_insert);   
      $schema_insert .= ");$crlf";   
      $temp = $temp.$schema_insert ;   
      }   
      return $temp;   
    }   

    function RestoreFromFile($file){   
      if (false !== ($fp = fopen($file, 'r'))) {   
       $sql_queries = trim(fread($fp, filesize($file)));   
       $this->splitMySqlFile($pieces, $sql_queries);   
       foreach ($pieces as $query) {   
        if(!$this->execute(trim($query)))   
        return false;   
       }   
       return true;   
      }   
      return false;   
    }   

    function RestoreFromContent($content)   
    {   
      $content = trim($content);   
      $this->splitMySqlFile($pieces, $content);   
      foreach ($pieces as $query) {   
       if(!$this->execute(trim($query)))   
       return false;   
      }   
      return true;   
    }   

    function splitMySqlFile(&$ret, $sql)   
    {   
      $sql= trim($sql);   
      $sql=split(';',$sql);   
      $arr=array();   
      foreach($sql as $sq)   
      {   
        if($sq!="");   
        $arr[]=$sq;   
      }   
      $ret=$arr;   
      return true;   
    }   
}    

$db=new db();   

// 生成 word    
//$map=array('No','Name','Email','Age');   
//echo  $db->toWord('test',$map,'档案');   

// 生成 Excel    
//$map=array('No','Name','Email','Age');   
//echo  $db->toExcel('test',$map,'档案');   

// 生成 Xml    
//echo  $db->toExtXml('test',0,20);   

// 生成 Json    
//echo  $db->toExtJson('test',0,20);   

//备份       
//echo $db->Backuptofile('test','backup');    
?>

整表备份

复制代码 代码如下:

$link = mysql_connect(DB_HOST,DB_USER,DB_PASS);
$tables = mysql_list_tables(DB_NAME);
$cachetables = array(); $tableselected = array();
while ($table = mysql_fetch_row($tables))
{
   $cachetables[$table[0]] = $table[0];
   $tableselected[$table[0]] = 1;
}
$table = $cachetables;
$filename =  DB_NAME . "_" . date("Y_m_d_H_i_s") . ".sql";
$path = "sql/" . $filename;
$filehandle = fopen($path, "w");
$result = mysql_query("SHOW tables");
while ($currow = mysql_fetch_array($result))
{
   if (isset($table[$currow[0]]))
   {
     sqldumptable($currow[0], $filehandle);
     fwrite($filehandle, "\n\n\n");
   }
}
fclose($filehandle);
$update_data = array('filename' => $filename, 'postdate' => mktime());
$db->insert('backup_db', $update_data);
// data dump functions
function sqldumptable($table, $fp = 0)
{
    $tabledump = "DROP TABLE IF EXISTS " . $table . ";\n";
    $result = mysql_fetch_array(mysql_query("SHOW CREATE TABLE " . $table));
    //echo "SHOW CREATE TABLE $table";
    $tabledump .= $result[1] . ";\r\n";
    if ($fp) {
        fwrite($fp, $tabledump);
    } else {
        echo $tabledump;
    }
    // get data
    $rows = mysql_query("SELECT * FROM " . $table);
    // $numfields=$DB->num_fields($rows);
    $numfields = mysql_num_fields($rows);
    while ($row = mysql_fetch_array($rows)) {
        $tabledump = "INSERT INTO " . $table . " VALUES(";
        $fieldcounter = -1;
        $firstfield = 1;
        // get each field's data
        while (++$fieldcounter             if (!$firstfield) {
                $tabledump .= ", ";
            } else {
                $firstfield = 0;
            }
            if (!isset($row[$fieldcounter])) {
                $tabledump .= "NULL";
            } else {
                $tabledump .= "'" . mysql_escape_string($row[$fieldcounter]) . "'";
            }
        }
        $tabledump .= ");\n";
        if ($fp) {
            fwrite($fp, $tabledump);
        } else {
            echo $tabledump;
        }
    }
    mysql_free_result($rows);
}

导入数据库

复制代码 代码如下:

/************
*
PHP导入.sql文件
运行版本:php5,php4 使用的时候请选择
作者:panxp
邮件:coolpan123@gmail.com
*
*************/
    $file_dir = dirname(__FILE__);
    $file_name = "2010-05-09-bak.sql";
    $conn = mysql_connect(DB_HOST,DB_USER,DB_PASS);
    mysql_select_db(DB_NAME, $conn);
    /** PHP5 版本 **/
    $get_sql_data = file_get_contents($file_name, $file_dir);
    /** 
    * PHP4 版本
    if(file_exists($file_dir."/".$file_name))
    {
        $get_sql_data = fopen($file_dir."/".$file_name,"r");  
        if(!$get_sql_data)
        {
            echo "不能打开文件";
        }
        else
        {
            $get_sql_data = fread($get_sql_data, filesize ($file_dir."/".$file_name));
        }
    }
    ***/
    $explode = explode(";", $get_sql_data);
    $cnt = count($explode);
    for ($i=0; $i    {
        $sql = $explode[$i];
        $result = mysql_query($sql);
        mysql_query("set names 'utf8'");
        if ($result) {
            echo "成功:".$i."个查询
";
        } else {
            echo "导入失败:".mysql_error();
        }
    }
?>