本文实例讲述了PHP实现断点续传乱序合并文件的方法。分享给大家供大家参考，具体如下：
分割成多个文件发送，由于网络原因并不上先发就能发接收到。所以我们不能按顺序合并。
分割文件源码前面一篇文章《PHP断点续传之文件分割合并》
merge2.php
<?php
$fileTotaiSize = filesize("socket.zip");
$filelist = glob('./split/*socket*.tmp');
$filesize = 3096;
//打乱读取文件顺序
shuffle($filelist);
$mergeFileName = 'merg2.zip';
if(is_file($mergeFileName))
{
unlink($mergeFileName);
}
$fp2 = fopen($mergeFileName,"w+");
//创建空白文件
$str = str_pad('',$fileTotaiSize);
fwrite($fp2, $str, $fileTotaiSize);
foreach($filelist as $k => $v)
{
$tmp = explode('.',$v);
$len = explode('-', $tmp[3]);
$offset = (int) $len[0];
$fp = fopen($v, "rb");
$content = fread($fp, $filesize);
echo $offset, "\n";
fseek($fp2, $offset);
fwrite($fp2, $content, strlen($content));
unset($content);
fclose($fp);
}
fclose($fp2);
补充：前文中的分割文件split.php如下：
<?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);
希望本文所述对大家PHP程序设计有所帮助。
