class otherArr {private $char="UTF-8";private $cvs_fege=","; // cvs 分割符/**数组 转 其他格式数据* @parem $data 要转换的数据* @parem $format xml json cvs* @return  string 如果没有数据传入返回 false* */public function  array_other($data,$format="json"){if(!is_array($data) || empty($data)){return false;}$format=strtolower($format);switch($format){case "xml":$data2=$this->arr_xml($data);break;case "cvs":$data2=$this->arr_cvs($data);break;default:$data2=$this->arr_json($data);break;}return $data2;}/**其他格式数据 转 数组* @parem $data 要转换的数据* @parem $format 原数据格式* @parem $tit_true 二维数组第二层key 值是否相同，默认相同 为true* @return arr 如果没有数据传入返回 false* */public function other_array($data,$format){if(!isset($data) || !isset($format) || empty($data) || empty($format)){return false;}$format=strtolower($format);switch($format){case "xml":$data2=$this->xml_arr($data);break;case "cvs":$data2=$this->cvs_arr($data);break;case "json":$data2=$this->json_arr($data);break;default :return $data;// 返回原数据
          }return $data2;}//------------------------------------------------------------数组转其他格式 start/** 数组 转 xml  * */private function arr_xml($data){$xml = "<xml>";foreach ($data as $k=>$v){if(is_array($v)){$xml.=is_numeric($k)?"":"<".$k.">";foreach ($v as $kk=>$vv){$xml.="<".$kk.">".$vv."</".$kk.">";}$xml.=is_numeric($k)?"":"</".$k.">";}else{$xml.="<".$k.">".$v."</".$k.">";}}$xml.="</xml>";return $xml;}/** 一维 二维 数组 转 cvs  * */private function arr_cvs($data){$string="";// 判断是一维数组还是二维数组  如果是一维数组if(count($data) == count($data,1)){$tit=array_keys($data);$string .= implode($this->cvs_fege,$tit)."\n";}else{$v_tit="";}foreach ($data as $k=> $v){if(is_array($v)) // 二维数组
            {if(empty($v_tit)) // 如果第二层循环中的key 值相同，只取一次值
                {$v_tit=array_keys($v);$string .= implode($this->cvs_fege,$v_tit)."\n";}$string .= implode($this->cvs_fege,$v)."\n";}}// 一维数组if(count($data) == count($data,1)){$string .= implode($this->cvs_fege,$data)."\n";}return $this->char_gbk($string); // execle 打开cvs 不乱码
    }/** 数组 转 json * */private function arr_json($data){foreach($data as $k=>$v){if(is_array($v)) // 二维数组
            {foreach($v as $kk=>$vv){$v[$kk]=$this->char_utf($v[$kk]);}}else           //  一维数组
            {$data[$k]=$this->char_utf($data[$k]);}}return json_encode($data);}//------------------------------------------------------------数组转其他格式 end//------------------------------------------------------------其他格式转数组 start/** xml 转 数组 **/private function xml_arr($data){//libxml_disable_entity_loader(true);禁止外部调用return json_decode(json_encode(simplexml_load_string($data, 'SimpleXMLElement', LIBXML_NOCDATA)), true);}/** json 转 数组 **/private function json_arr($data){$data=$this->char_utf($data);return json_decode($data,true);}/** cvs 转 数组   返回二维数组 **/private function cvs_arr($data){$data=array_values(array_filter(explode("\n",$data)));foreach($data as $k=>$v){if($k<1){$tit=explode($this->cvs_fege,$v);}else{$v_arr=array_values(array_filter(explode($this->cvs_fege,$v)));foreach($tit as $kkk=>$vvv){$new_data[$k-1][$tit[$kkk]]=$v_arr[$kkk];}}}unset($data);return $new_data;}//------------------------------------------------------------其他格式转数组 end/** 取得当前字符编码* @parem $str 要检验的字符* @parem  string 字符集* */private function get_character($str){if(function_exists("mb_detect_encoding")){return mb_detect_encoding($str);}else{if($this->is_gb2312($str)){return "GB2312";}else{return $this->char;}}}/** 判断是gbk还是utf-8 只应用于中文* @parem $str 要检验的字符* @return  bool: true - 含GB编码 false - 为UTF-8编码* */private function is_gb2312($str){for($i=0; $i<strlen($str); $i++){$v = ord( $str[$i] );if( $v > 127){if( ($v >= 228) && ($v <= 233) ){if( ($i+2) >= (strlen($str) - 1)) return true;  // not enough characters$v1 = ord( $str[$i+1] );$v2 = ord( $str[$i+2] );if( ($v1 >= 128) && ($v1 <=191) && ($v2 >=128) && ($v2 <= 191) ) // utf编码return false;   // utf-8elsereturn true;  // gbk
                }}}return true; // gb2312
    }/**转换字符 其他字符转utf8* */private function char_utf($str){$character=$this->get_character($str);if($character==$this->char){return $str;}if(function_exists('mb_convert_encoding')){$str=mb_convert_encoding($str, $this->char,$character);}else if(function_exists('iconv')){$str2=iconv($character,$this->char."//IGNORE", $str);if(!empty($str2))// 如果字符不能以目标字符集表达的字符将被默默丢弃 防止字符为空
            {return $str2;}}// 如果没有转换字符函数 直接返回字符return $str;}/** utf 转换 gbk* */private function char_gbk($str){$char=$this->is_gb2312($str);if($char)return $str;if(function_exists('mb_convert_encoding')){$str=mb_convert_encoding($str,"GBK",$this->char);}else if(function_exists('iconv')){$str2=iconv($this->char,"GBK//IGNORE", $str);if(!empty($str2))// 如果字符不能以目标字符集表达的字符将被默默丢弃 防止字符为空
            {return $str2;}}return $str;}}

// 调用示例 如果下载数据可以用excel 打开
$arr = array ('a'=>'dsfsf','b'=>2,'c'=>3,'d'=>4,'e'=>5);
$data=array("a"=>array("username"=>"汉字","password"=>"123"),"b"=>array("username"=>"test2","password"=>"456"),"c"=>array("username"=>"test3","password"=>"789"),
);
$data2=array(array("username"=>"汉字","password"=>"123"),array("username"=>"test2","password"=>"456"),array("username"=>"test3","password"=>"789"),array("username"=>"test4","password"=>"111"),array("username"=>"test5","password"=>"222"),
);
$otherArr=new otherArr();
$f_data=$otherArr->array_other($data2,"cvs");
/*var_dump($f_data);
echo "<hr/>";
$f_data2=$otherArr->other_array($f_data,"cvs");*/
//var_dump($f_data2);// 下载 cvs  文件
$filename = date('Ymd').'.csv'; //设置文件名
header("Content-type:text/csv");
header("Content-Disposition:attachment;filename=".$filename);
header('Cache-Control:must-revalidate,post-check=0,pre-check=0');
header('Expires:0');
header('Pragma:public');
echo $f_data;

$head=chr(0xEF).chr(0xBB).chr(0xBF); // 防止 excle 打开乱码