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• 前端之家
• PHP
• php断点续传之如何分割合并文件

<div class="codebody" id="code94839"> @H_502_2@<?PHP @H_502_2@ini_set("memorylimit","50M");//必须的，根据你环境的实际情况尽量大，防止报错 @H502_2@ini_set("max_executiontime","100"); @H502_2@//file_exists() 函数检查文件或目录是否存在，存在则返回 true，否则返回 false。 @H_502_2@//fread() 函数读取文件（可安全用于二进制文件）。fread() 从文件指针 file 读取最多 length 个字节。 @H_502_2@//filesize() 函数返回指定文件的大小（字节）。本函数的结果会被缓存。请使用 clearstatcache() 来清除缓存。 @H_502_2@$orgFile = 'Fireworks8-chs.exe';//源文件 @H_502_2@$cacheFileName = 'vbcache';//分割成的临时文件块 @H_5022@function cutFile($fileName,$block) {//分割 @H5022@global $cacheFileName; @H502_2@if (!fileexists($fileName)) return false; @H5022@$num = 1; @H5022@$file = fopen($fileName,'rb'); @H5022@while ($content = fread($file,$block)) { @H5022@$cacheFile = $cacheFileName . $num++ . '.dat'; @H5022@$cfile = fopen($cacheFile,'wb'); @H5022@fwrite($cfile,$content); @H5022@fclose($cfile); @H5022@} @H5022@fclose($file); @H5022@} @H5022@function mergeFile($targetFile) {//合并 @H5022@global $cacheFileName; @H5022@$num = 1; @H5022@$file = fopen($targetFile,'wb'); @H5022@while ($num > 0) { @H5022@$cacheFile = $cacheFileName . $num++ . '.dat'; @H502_2@if (fileexists($cacheFile)) { @H5022@$cfile = fopen($cacheFile,'rb'); @H5022@$content = fread($cfile,filesize($cacheFile)); @H5022@fclose($cfile); @H5022@fwrite($file,$content); @H5022@} @H5022@else { @H5022@$num = -1; @H5022@} @H5022@} @H5022@fclose($file); @H5022@} @H502_2@//调用 @H_502_2@cutFile($orgFile,10 pow(2,20)); //10 pow(2,20) 就等于 10M pow() 函数返回 x 的 y 次方 @H_5022@mergeFile('ok.exe'); @H5022@?> @H502_2@