javascript - php cannot export excel -

i can't excel file request. why?

my code:

angular:

//angular service //used export button this.exportexcel = function($scope){         return $http({             method: "post",             url: "/home/ppeconfigperiod/getflowlisttodatatable",             headers: { 'content-type': 'application/json; charset=utf-8' },             data: { ppeflowselectcon : $scope.ppeflowselectcon, periodid : $scope.currentperiod.id, staff :  $scope.staff }         }).success(function(data){             if(data != null){                 //location.href=data;             }         });     } 

php:

public function getflowlisttodatatable() {     $requesturl = apiurls::getflowlisttodatatable;     $data = json_decode(file_get_contents("php://input"));     $ppeflowselectcon = $data->ppeflowselectcon;     $filename = "ppetrack_" . $data->staff->loginname . "_" . date('y-m-d');     $postarray = array(         "periodid" => $data->periodid     );     $result = servicepost($requesturl, $postarray, $ppeflowselectcon);      $newresult = array();     foreach( $result $key => $value){         $newresult = get_object_vars($value);     }      exportexcel($newresult, array(), $filename);      //$this->ajaxreturn($result); }   function exportexcel($data=array(), $title=array(), $filename='report'){ header("content-type:application/octet-stream"); header("accept-ranges:bytes"); header("content-type:application/vnd.ms-excel"); header("content-disposition:attachment;filename=".$filename.".xls"); header("pragma: no-cache"); header("expires: 0");  if (!empty($title)){     foreach ($title $k => $v) {         $title[$k]=iconv("utf-8", "gb2312",$v);     }     $title= implode("\t", $title);     echo "$title\n"; } if (!empty($data)){     foreach($data $key=>$val){         foreach ($val $ck => $cv) {             $data[$key][$ck]=iconv("utf-8", "gb2312", $cv);         }         $data[$key]=implode("\t", $data[$key]);      }     echo implode("\n",$data); } 

and webapi：

    [httppost]     [route("getflowlisttodatatable")]     public datatable getflowlisttodatatable(ppeflowselectcon selcon, guid periodid)     {         return new configperiodfacade().getflowlisttodatatable(selcon, periodid);                            } 

thanks.

first of all,your code messy!try using comments can understand doing.
connecting excel file done odbc_connect.like this:

$excelfile = realpath('c:/exceldata.xls');  //the path of excel file stored in variable $exceldir = dirname($excelfile); $connection = odbc_connect("driver={microsoft excel driver (*.xls)};driverid=790;dbq=$excelfile;defaultdir=$exceldir" , '', ''); 

this article familiar odbc_connect().