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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