本篇文章给大家带来的内容是关于php如何使用递归来计算一个目录中所有文件的大小 (代码),有一定的参考价值,有需要的朋友可以参考一下,希望对你有所帮助。
sudo find /private/etc -exec ls -l {} \; | awk 'BEGIN {sum=0} {sum+=$5;} END {print sum}' # 4947228 ls -ld /etc #/etc -> private/etc
先计算出/etc目录所有文件的大小4947228
DirUtil.php
<?php /** * Created by PhpStorm. * User: Mch * Date: 8/14/18 * Time: 22:11 */ class DirUtil { public static function getSize(string $path) { $totalSize = 0; $path = realpath($path); if (!file_exists($path)) { return $totalSize; } if (!is_dir($path)) { return filesize($path); } if ($dh = opendir($path)) { while (($file = readdir($dh)) !== false) { if ($file !== "." && $file !== "..") { $abs = $path.DIRECTORY_SEPARATOR.$file; if (is_dir($file)) { $totalSize += self::getSize($abs); } else { $totalSize += filesize($abs); } } } closedir($dh); } return $totalSize; } public static function entryForEach(string $path, callable $callback, mixed $data = null) { $path = realpath($path); if (!file_exists($path)) { return 0; } if (!is_dir($path)) { return call_user_func($callback, $path, $data); } if ($dh = opendir($path)) { while (($file = readdir($dh)) !== false) { if ($file !== "." && $file !== "..") { $abs = $path.DIRECTORY_SEPARATOR.$file; if (is_dir($file)) { self::entryForEach($abs, $callback, $data); } else { call_user_func($callback, $abs, $data); } } } closedir($dh); } return 0; } public static function entryReduce(string $path, callable $callback, $init) { $acc = $init; $path= realpath($path); if (!file_exists($path)) { return $acc; } if (!is_dir($path)) { return call_user_func($callback, $acc, $path); } if ($dh = opendir($path)) { while (($file = readdir($dh)) !== false) { if ($file !== "." && $file !== "..") { $abs = $path.DIRECTORY_SEPARATOR.$file; if (is_dir($file)) { $acc = self::entryReduce($abs, $callback, $acc); } else { $acc= call_user_func($callback, $acc, $abs); } } } closedir($dh); } return $acc; } }
test:
// php ./DirUtil.php /etc if ($argc < 2) { printf("Usage: php %s [filename]\n", __FILE__); exit(1); } echo DirUtil::getSize($argv[1]).PHP_EOL; // 899768 $dir_get_size = function($path) { $size = 0; DirUtil::entryForEach($path, function($path) use (&$size) { $size += filesize($path); }); return $size; }; echo $dir_get_size($argv[1]).PHP_EOL; // 899768 echo DirUtil::entryReduce($argv[1], function($sum, $path) { $sum += filesize($path); return $sum; }, 0).PHP_EOL; // 899768
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