angularjs too many request queue using promise

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<div ng-app>
  <h2>$q test</h2>
  <div ng-controller="TodoCtrl">
      <div ng-bind="'Promise1: ' + Promise1"></div>
      <div ng-bind="'Promise2: ' + Promise2"></div>
      <div ng-bind="'Promise3: ' + Promise3"></div>
      <div ng-bind="'Promise4: ' + Promise4"></div>
      <div ng-bind="'Promise5: ' + Promise5"></div><br />
      <div ng-bind="'Status1: ' + Status1"></div>
      <div ng-bind="'Status2: ' + Status2"></div>
  </div>

</div>

JS:

function TodoCtrl($scope, $q, $timeout) {

    function createPromise(name, timeout, willSucceed) {

        $scope[name] = 'Running';

        var deferred = $q.defer();

        $timeout(function() {

            if (willSucceed) {

                $scope[name] = 'Completed';

                deferred.resolve(name);

            } else {

                $scope[name] = 'Failed';

                deferred.reject(name);

            }

        }, timeout * 1000);

        return deferred.promise;

    }

    

    // Create 5 promises

    var promises = [];

    var names = [];

    for (var i = 1; i <= 5; i++) {

        var willSucceed = true;

        if (i == 2) willSucceed = false;

        promises.push(createPromise('Promise' + i, i, willSucceed));

    }

    

    // Wait for all promises    

    $scope.Status1 = 'Waiting';

    $scope.Status2 = 'Waiting';

    $q.all(promises).then(

        function() { 

            $scope.Status1 = 'Done'; 

        }, 

        function() { 

            $scope.Status1 = 'Failed'; 

        }

    ).finally(function() {

        $scope.Status2 = 'Done waiting';

    });

}

result:

Promise1: Completed

Promise2: Failed

Promise3: Completed

Promise4: Completed

Promise5: Completed

Status1: Failed

Status2: Done waiting

php data array echo to excel file

<?PHP
  $data = array(
    array("firstname" => "Mary", "lastname" => "Johnson", "age" => 25),
    array("firstname" => "Amanda", "lastname" => "Miller", "age" => 18),
    array("firstname" => "James", "lastname" => "Brown", "age" => 31),
    array("firstname" => "Patricia", "lastname" => "Williams", "age" => 7),
    array("firstname" => "Michael", "lastname" => "Davis", "age" => 43),
    array("firstname" => "Sarah", "lastname" => "Miller", "age" => 24),
    array("firstname" => "Patrick", "lastname" => "Miller", "age" => 27)
  );

  function cleanData(&$str)
  {
    $str = preg_replace("/\t/", "\\t", $str);
    $str = preg_replace("/\r?\n/", "\\n", $str);
    if(strstr($str, '"')) $str = '"' . str_replace('"', '""', $str) . '"';
  }

  // file name for download
  $filename = "website_data_" . date('Ymd') . ".xls";

  header("Content-Disposition: attachment; filename=\"$filename\"");
  header("Content-Type: application/vnd.ms-excel");

  $flag = false;
  foreach($data as $row) {
    if(!$flag) {
      // display field/column names as first row
      echo implode("\t", array_keys($row)) . "\n";
      $flag = true;
    }
    array_walk($row, 'cleanData');
    echo implode("\t", array_values($row)) . "\n";
  }

  exit;
?>