PHP下载生成的csv文件及问题总结

//要生成csv文件的数组
$csvArr=array();
$csvArr[]=array('用户编号1','上班日期1','签到时间1','签退时间1');
$csvArr[]=array('用户编号2','上班日期2','签到时间2','签退时间2')
download_send_headers("data_export_" . date("Y-m-d") . ".csv");
$head=array('用户编号','上班日期','签到时间','签退时间');
echo array2csv($csvArr,$head);
unset($csvArr);
die();
function array2csv(array &$array,$head)
{
  if (count($array) == 0) {
   return null;
  }
  ob_start();
  $df = fopen("php://output", 'w');
  if(!$head){
    $head=array_keys(reset($array));
  }
  fputcsv($df,$head);
  foreach ($array as $row) {
   fputcsv($df, $row);
  }
  fclose($df);
  return ob_get_clean();
}
function download_send_headers($filename) {
  // disable caching
  $now = gmdate("D, d M Y H:i:s");
  header("Expires: Tue, 03 Jul 2001 06:00:00 GMT");
  header("Cache-Control: max-age=0, no-cache, must-revalidate, proxy-revalidate");
  header("Last-Modified: {$now} GMT");
  // force download 
  header("Content-Type: application/force-download");
  header("Content-Type: application/octet-stream");
  header("Content-Type: application/download");
  // disposition / encoding on response body
  header("Content-Disposition: attachment;filename={$filename}");
  header("Content-Transfer-Encoding: binary");
}

<?php
$data = array(
    array( 'row_1_col_1', 'row_1_col_2', 'row_1_col_3' ),
    array( 'row_2_col_1', 'row_2_col_2', 'row_2_col_3' ),
    array( 'row_3_col_1', 'row_3_col_2', 'row_3_col_3' ),
  );
$filename = "example";
  header("Content-type: text/csv");
  header("Content-Disposition: attachment; filename={$filename}.csv");
  header("Pragma: no-cache");
  header("Expires: 0");
outputCSV($data);
function outputCSV($data) {
    $outputBuffer = fopen("php://output", 'w');
    foreach($data as $val) {
    foreach ($val as $key => $val2) {
     $val[$key] = iconv('utf-8', 'gbk', $val2);
// CSV的Excel支持GBK编码，一定要转换，否则乱码
     }
      fputcsv($outputBuffer, $val);
    }
    fclose($outputBuffer);
  }
?>

function __fgetcsv(& $handle, $length = null, $d = ',', $e = '"') {
   $d = preg_quote($d);
   $e = preg_quote($e);
   $_line = "";
   $eof=false;
   while ($eof != true) {
     $_line .= (empty ($length) ? fgets($handle) : fgets($handle, $length));
     $itemcnt = preg_match_all('/' . $e . '/', $_line, $dummy);
     if ($itemcnt % 2 == 0)
       $eof = true;
   }
   $_csv_line = preg_replace('/(?: |[ ])?$/', $d, trim($_line));
   $_csv_pattern = '/(' . $e . '[^' . $e . ']*(?:' . $e . $e . '[^' . $e . ']*)*' . $e . '|[^' . $d . ']*)' . $d . '/';
   preg_match_all($_csv_pattern, $_csv_line, $_csv_matches);
   $_csv_data = $_csv_matches[1];
   for ($_csv_i = 0; $_csv_i < count($_csv_data); $_csv_i++) {
     $_csv_data[$_csv_i] = preg_replace('/^' . $e . '(.*)' . $e . '$/s', '$1' , $_csv_data[$_csv_i]);
     $_csv_data[$_csv_i] = str_replace($e . $e, $e, $_csv_data[$_csv_i]);
   }
   return empty ($_line) ? false : $_csv_data;
}

<?php
$now = gmdate("D, d M Y H:i:s");
header("Expires: Tue, 03 Jul 2001 06:00:00 GMT");
header("Cache-Control: max-age=0, no-cache, must-revalidate, proxy-revalidate");
header("Last-Modified: {$now} GMT");
// force download
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
// disposition / encoding on response body
header("Content-Disposition: attachment;filename={$filename}");
header("Content-Transfer-Encoding: binary");
$items_data=array(
'0'=>array('title'=>'test test test1'),
'1'=>array('title'=>'test test test2'),
'2'=>array('title'=>'test test test3')
)
print(chr(0xEF).chr(0xBB).chr(0xBF));
//设置utf-8 + bom ，处理汉字显示的乱码
echo array2csv($items_data);
function array2csv(array &$array)
{
  if (count($array) == 0) {
   return null;
  }
  ob_start();
  $df = fopen("php://output", 'w');
  fputcsv($df, array_keys(reset($array)));
  foreach ($array as $row) {
   fputcsv($df, $row);
  }
  fclose($df);
  return ob_get_clean();
}
?>