php数据库导出类 导出JSON,XML,WORD,EXCEL

本类实现：

  数据库信息导出：word，excel，json，xml，sql
  数据库恢复：从sql，从文件

具体用法:

首先新建测试用数据库mytest，然后在里面建张表

PHP代码:

以下是代码片段：
-- 
-- 表的结构 `test`
-- 
CREATE TABLE `test` (
  `id` int(11) NOT NULL auto_increment,
  `name` varchar(100) NOT NULL,
  `email` varchar(200) NOT NULL,
  `age` int(3) NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=3 ;
-- 
-- 导出表中的数据 `test`
-- 
INSERT INTO `test` (`id`, `name`, `email`, `age`) VALUES 
(1, 'pjq518', [email=]'pjq518@126.com'[/email], 22),
(2, 'xiaoyu', [email=]'xiaoyu@126.com'[/email], 21);

1.导出ext能方便调用的json

PHP代码:

以下是代码片段：
?$db=new db();
echo ?$db->toExtJson('test');

//输出结果为
//{'totalCount':'2','rows':[{'id':'1','name':'pjq518','email':'pjq518@126.com','age':'22'},{'id':'2','name':'xiaoyu','email':'xiaoyu@126.com','age':'21'}]}

toExtJson(?$table,?$start="0",?$limit="10",?$cons="")有4个参数，?$table为表名，?$cons为条件，可以为string或array

2、导出xml

PHP代码:

以下是代码片段：
?$db=new db();
echo ?$db->toExtXml('test');

//输出结果
 

3、导出excel和word

PHP代码:

以下是代码片段：
?$db=new db();
//toExcel
?$map=array('No','Name','Email','Age');//表头
?$db->toExcel('test',?$map,'档案');
//导出word表格
//?$db->toWord('test',?$map,'档案');

//效果如下图

PHP代码:

<?php
class Db {
    var $conn;

    /***************************************************************************
     * 连接数据库
     * return：MySQL 连接标识,失败返回FALSE
     **************************************************************************/
    function Db($host="localhost",$user="root",$pass="123456",$db="juren_gaokao") {
        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'");
    }

    /***************************************************************************
     * 执行SQL查询
     * return:查询结构集 resource
     **************************************************************************/
    function execute($sql) {
        return mysql_query($sql,$this->conn);
    }

    /***************************************************************************
     * 返回结构集中行数
     * return：number 数字
     **************************************************************************/
    function findCount($sql) {
        $result=$this->execute($sql);
        return mysql_num_rows($result);
    }

    /***************************************************************************
     * 执行SQL查询
     * return：array 数组
     **************************************************************************/
    function findBySql($sql) {
        $array=array();
        $result=mysql_query($sql);
        $i=0;
        while($row=mysql_fetch_assoc($result)) {
            $array[$i]=$row;
            $i++;
        }
        return $array;
    }

    /***************************************************************************
    *$con的几种情况
    *空：返回全部记录
    *array：eg. array('id'=>'1') 返回id=1的记录
    *string :eg. 'id=1' 返回id=1的记录
    * return：json 格式数据
    ***************************************************************************/
    function toExtJson($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;$i<$resultNum;$i++) {
            $str.="{";
            $count=count($result[$i]);
            $j=1;
            foreach($result[$i] as $key=>$val) {
                if($j<$count) {
                    $str.="'".$key."':'".$val."',";
                }
                elseif($j==$count) {
                    $str.="'".$key."':'".$val."'";
                }
                $j++;
            }

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

    /***************************************************************************
     * $table:表名
     * $cons:sql条件
     * return:SQL语句
     **************************************************************************/
    function generateSql($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;
    }

   
    /***************************************************************************
     * $table:表名
     * $cons：条件
     * return：XML格式文件
     **************************************************************************/
    function toExtXml($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='<?xml version="1.0"  encoding="utf-8" ?>';
        $xml.="<xml>";
        $xml.="<totalCount>".$totalNum."</totalCount>";
        $xml.="<items>";
        for($i=0;$i<$resultNum;$i++) {
            $xml.="<item>";
            foreach($result[$i] as $key=>$val)
                $xml.="<".$key.">".$val."</".$key.">";
            $xml.="</item>";
        }
       
        $xml.="</items>";
        $xml.="</xml>";
        return $xml;
    }


    /***************************************************************************
     * $table:表名
     * $mapping：数组格式头信息$map=array('No','Name','Email','Age');
     * $fileName：WORD文件名称
     * return：WORD格式文件
     **************************************************************************/
    function toWord($table,$mapping,$fileName) {
        header('Content-type: application/doc');
        header('Content-Disposition: attachment; filename="'.$fileName.'.doc"');
        echo '<html xmlns:o="urn:schemas-microsoft-com:office:office"
       xmlns:w="urn:schemas-microsoft-com:office:word"
       xmlns="[url=http://www.w3.org/TR/REC-html40]http://www.w3.org/TR/REC-html40[/url]">
                <head>
                <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
                <title>'.$fileName.'</title>
                </head>
                <body>';
        echo'<table border=1><tr>';
        if(is_array($mapping)) {
            foreach($mapping as $key=>$val)
                echo'<td>'.$val.'</td>';
        }
        echo'</tr>';
        $results=$this->findBySql('select * from '.$table);
        foreach($results as $result) {
            echo'<tr>';
            foreach($result as $key=>$val)
                echo'<td>'.$val.'</td>';
            echo'</tr>';
        }
        echo'</table>';
        echo'</body>';
        echo'</html>';
    }


    /***************************************************************************
     * $table:表名
     * $mapping：数组格式头信息$map=array('No','Name','Email','Age');
     * $fileName：Excel文件名称
     * return：Excel格式文件
     **************************************************************************/
    function toExcel($table,$mapping,$fileName) {
        header("Content-type:application/vnd.ms-excel");
        header("Content-Disposition:filename=".$fileName.".xls");
        echo'<html xmlns:o="urn:schemas-microsoft-com:office:office"
        xmlns:x="urn:schemas-microsoft-com:office:excel"
        xmlns="[url=http://www.w3.org/TR/REC-html40]http://www.w3.org/TR/REC-html40[/url]">
        <head>
        <meta http-equiv="expires" content="Mon, 06 Jan 1999 00:00:01 GMT">
        <meta http-equiv=Content-Type content="text/html; charset=iso-8859-1">
        <!--[if gte mso 9]><xml>
        <x:ExcelWorkbook>
        <x:ExcelWorksheets>
        <x:ExcelWorksheet>
        <x:Name></x:Name>
        <x:WorksheetOptions>
        <x:DisplayGridlines/>
        </x:WorksheetOptions>
        </x:ExcelWorksheet>
        </x:ExcelWorksheets>
        </x:ExcelWorkbook>
        </xml><![endif]-->
        </head>
        <body link=blue vlink=purple leftmargin=0 topmargin=0>';
        echo'<table width="100%" border="0" cellspacing="0" cellpadding="0">';
        echo'<tr>';
        if(is_array($mapping)) {
            foreach($mapping as $key=>$val)
                echo'<td>'.$val.'</td>';
        }
        echo'</tr>';
        $results=$this->findBySql('select * from '.$table);
        foreach($results as $result) {
            echo'<tr>';
            foreach($result as $key=>$val)
                echo'<td>'.$val.'</td>';
            echo'</tr>';
        }
        echo'</table>';
        echo'</body>';
        echo'</html>';
    }

   
    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);
        }
    }

   
    /***************************************************************************
     * 备份数据库数据到文件
     * $table：表名
     * $file：文件名
     **************************************************************************/
    function Backuptofile($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 = "";
        $crlf="rn";
        foreach($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;
    }
}