php如何?斷點續傳和檔案分割範例程式碼詳解

php實現斷點續傳，就需要把大檔案分割成多個小檔案，然後單個上傳。傳完後在合并。

下面是範例程式碼：

split.php 分割檔案指令碼

<?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 合并檔案指令碼

<?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);

一個完整的實現代碼：

<?php ini_set("memory_limit", "50M");//必須的，根據你環境的實際情況盡量大，防止報錯 ini_set("max_execution_time", "100"); //file_exists() 函數檢查檔案或目錄是否存在，存在則返回 true，否則返回 false。 //fread() 函數讀取檔案（可安全用於二進位檔案）。fread() 從檔案指標 file 讀取最多 length 個位元組。 //filesize() 函數返回指定檔案的大小（位元組）。本函數的結果會被緩衝。請使用 clearstatcache() 來清除緩衝。 $orgFile = 'Fireworks8-chs.exe';//源檔案 $cacheFileName = 'vbcache';//分割成的臨時檔案塊 function cutFile($fileName,$block) {//分割 global $cacheFileName; if (!file_exists($fileName)) return false; $num = 1; $file = fopen($fileName, 'rb'); while ($content = fread($file,$block)) { $cacheFile = $cacheFileName . $num++ . '.dat'; $cfile = fopen($cacheFile, 'wb'); fwrite($cfile, $content); fclose($cfile); } fclose($file); } function mergeFile($targetFile) {//合并 global $cacheFileName; $num = 1; $file = fopen($targetFile, 'wb'); while ($num > 0) { $cacheFile = $cacheFileName . $num++ . '.dat'; if (file_exists($cacheFile)) { $cfile = fopen($cacheFile, 'rb'); $content = fread($cfile, filesize($cacheFile)); fclose($cfile); fwrite($file, $content); } else { $num = -1; } } fclose($file); } //調用 cutFile($orgFile, 10 * pow(2,20)); //10 * pow(2,20) 就等於 10M pow() 函數返回 x 的 y 次方 mergeFile('ok.exe'); ?>