php断点续传之文件分割合并的方法

php断点续传之文件分割合并的方法

php实现断点续传,就需要把大文件分割成多个小文件,然后单个上传。传完后在合并。

│ merge.php –合并文件脚本
│ merge.zip –合并后文件
│ socket.zip –需要分割的文件
│ split.php –分割文件脚本

└─split –分割后小文件目录

下面是源码

split.php

<?php

$fp = fopen("socket.zip", "rb");
$filesize = 10;
$i = 0;
$no = 1;
while(!feof($fp))
{
 $file = fread($fp, $filesize);

 $fp2 = fopen("./split/socket.port".sprintf("%04d",$no).".".$i."-".($i+$filesize).".tmp", "wb");
 fwrite($fp2, $file, $filesize);
 fclose($fp2);
 $i+=$filesize+1;
$no++;
}

fclose($fp);

merge.php

<?php
$filelist = glob('./split/*socket*.tmp');
$filesize = 10;

//print_r($filelist);
$mergeFileName = 'merg.zip';

unlink($mergeFileName);
 $fp2 = fopen($mergeFileName,"w+");
foreach($filelist as $k => $v)
{
 $fp = fopen($v, "rb");
  $content = fread($fp, $filesize);

  fwrite($fp2, $content, $filesize);
  unset($content);
  fclose($fp);
  echo $k,"\n";
}
 fclose($fp2);

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