csv 文件未在 for 循环内下载

Question

比较两个多维数组，通过匹配值得到结果。如何为这些各自的值创建和下载 csv 文件。我在下面尝试过这段代码

$mycsvfile_result = array();
foreach ($mycsvfile as $arr1)
{
   foreach ($mycsvfile_log as $arr2)
   {  
      if($arr2[2] == $arr1[0])
      {
         $mycsvfile_result[] = array($arr2[2], $arr2[7]);
      } 
   }                    
}

为 fputcsv 尝试了代码 1

header('Content-type: application/csv');
header('Content-Disposition: attachment; filename="demo.csv"');
header('Pragma: no-cache');
header('Expires: 0');
    $fp = fopen('php://output', 'w');
      $data=$mycsvfile_result;
      foreach ( $data as $line ) 
      {
        fputcsv($fp, $line);
      }
    fclose($fp);
exit();

为 fputcsv 尝试了代码 2

$csv = "col1,col2 \n";//Column headers
  foreach ($mycsvfile_result as $record)
  {
    $csv.= $record[0].','.$record[1]."\n"; //Append data to csv
  }
$csv_handler = fopen ('demo.csv','w');
fwrite ($csv_handler,$csv);
fclose ($csv_handler);
echo 'Data saved to demo.csv';

以上代码 1 结果为

id1,email1 id2,email2 id3,email3

以上代码 2 结果为

col1,col2 id1,email1 id2,email2 id3,email3 Data saved to demo.csv

Answer 1

我在 linux 机器上工作，我忘记给文件夹上传 csv 文件的权限。授予文件夹权限后，它就像一个魅力:)

csv 文件未在 for 循环内下载

csv file is not downloading within for loop

php

fputcsv