php下载文件显示进度（适用于CLI模式或长连接）

Posted 2020-11-14

1. 代码：

   <?php
   /*
   @desc：php下载文件显示进度
   @param file 待下载文件名
   @param name 存储到本地文件名
   */
   function downloadprogress($file,$name){
   $dir = dirname($name);
   if(!is_dir($dir)){
       mkdir($dir,0755,true);
   }
   ob_start();
   set_time_limit(0);
   $fr = fopen ($file, "rb");
   if ($fr) {
       $content = file_get_contents($file);
       $filesize = strlen($content);
       $fw = fopen ($name, "wb");
       $downlen=0;
       $last = 0;
       $diff = 0;
       echo "[";
       if ($fw) {
           while(!feof($fr)) {
               $data = fread($fr, 1024 * 8 );
               $downlen += strlen($data);
               fwrite($fw, $data, 1024 * 8 );
               $percent = round($downlen/$filesize*100,2);
               $diff += $percent - $last;
               if($diff > 1){
                   echo "#";
                   $diff = 0;
               }
               $last = $percent;
               ob_flush();
               flush();
           }
           echo "#]done";
       }
       if ($fr) {
           fclose($fr);
       }
       if ($fw) {
           fclose($fw);
       }
   }
   }

2. 测试：

   downloadprogress(‘2018.rar‘,‘aaa/01.rar‘);

3. 输出（cli下）：