<?php $orgFile = 'VirtualBox.exe'; $cacheFileName = 'vbcache'; cutFile($orgFile, 10 * pow(2,20)); //10 * pow(2,20) 就等于 10M mergeFile('cache2vb.exe'); function cutFile($fileName,$block) { 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) { 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); }