PHP获取文件大小和目录大小

1.确定文件的大小
filesize()函数返回指定文件的大小，以字节为单位。

int filesize(string filename)

eg:

<?php 
    $file = '/www/htdocs/book/chapter1.pdf';
    $bytes = filesize($file);
    $kilobytes = round($bytes/1024,2);
    printf("File %s is $bytes bytes,or %.2f kilobytes",basename($file),$kilobytes);
?>

File chapter1.pdf is 91815 bytes,or 89.66 kilobytes

2.确定目录内容的大小

<?php function directorySize($directory){ $directorySize = 0; //打开目录读取其内容 if($dh = @opendir($directory)){ //迭代处理每个目录项 while(($filename=readdir($dh))){ //过滤掉一些目录项 if($filename !="." && $filename !=".."){ //文件确定大小并添加总大小 if(is_file($directory."/".$filename)){ $directorySize+=filesize($directory."/".$filename); } //新目录，开始递归 if(is_dir($directory."/".$filename)){ $directorySize += directorySize($directory."/".$filename); } } } } @closedir($dh); return $directorySize; } $directory = '/user/book/'; $totalSize = round((directorySize($directory)/1048576),2); printf("Directory %s: %f MB",$directory: $totalSize); ?>