PHP traverses folders and calculates size
Jun 06, 2018 pm 01:59 PMThis article mainly introduces PHP to traverse folders and calculate the size. Interested friends can refer to it. I hope it will be helpful to everyone.
Traverse and print all files in the specified directory
<?php //功能:遍历并打印指定目录下所有文件 function scan_dir($dir_name,$dir_flag=1) { static $FILE_COUNT=1; //记录文件数目 初值为1 目录名称不记 $FILE_COUNT--; //每调用一次scan_dir()函数自减1 @$dir_handle=opendir($dir_name); //抑制错误信息显示 便于自定义错误显示 if(!$dir_handle) die("目录打开错误!"); while(false!==($filename=readdir($dir_handle))) //文件名为‘0'时,readdir返回 FALSE,判断返回值是否不全等 { $flag=$dir_flag; //古怪的 is_dir($filename) ! $filename这个路径必须能够寻到!当$filename不存在或者不是目录时返回false if($filename!='.'&&$filename!='..') { $FILE_COUNT++; //不记录当前路径和上一级路径 while($flag>0&&--$flag) //负数仍为真 echo '&nbsp'; if(is_dir($dir_name.$filename)) //判断 是否为一个目录 { echo '<strong>'."<a href=".$dir_name.$filename.">".$filename."</a></strong><br>"; scan_dir($dir_name.$filename.'/',$dir_flag+1); //$dir_flag标志目录树层次 } else { echo "<a href=".$dir_name.$filename.">".$filename."</a><br>"; } } } closedir($dir_handle); //关闭目录句柄 echo "文件总数:".$FILE_COUNT.'<br>'; } scan_dir('D:/AppServ/www/mytest/shopping/payment/'); /*总结: 1,关于路径 目录的路径末尾都加上 '/' 以便后面与文件名字符串连接 形成新的 路径字符串 2,目录遍历 这是一个关于树的问题 3,is_dir()函数第一个参数必须是一个能够识别的PATH否则会因目录不存在而返回一个false容易误解 得出 “这不是一个目录”的错误结论 形成逻辑上的错误 4,注意当前路径'.'和上一级路径'..'的剔除 否则 在递归环节造成死循环 直至内存耗尽出错。 5,dir_flag这个变量是记录树的深度 以便于目录分级分层输出 */ /*不足 1,输出排版不完善 2,逻辑与表示层混乱 不分明 大忌! 3,面向过程 */
##Single directory
##// 列出目录内容 $dir 不要加 '/'
function list_files($dir)
{
if(is_dir($dir))
{
if($handle = opendir($dir))
{
while(($file = readdir($handle)) !== false)
{
if($file != "." && $file != ".." && $file != "Thumbs.db")
{
echo '<a href="'.$dir.'/'.$file.'">'.$file.'</a><br>'."\n";
}
}
closedir($handle);
}
}
}
list_files('D:/AppServ/www/mytest/shopping/payment');
<?php function getDirSize($dir) { $handle = opendir($dir); while (false!==($FolderOrFile = readdir($handle))) { if($FolderOrFile != "." && $FolderOrFile != "..") { if(is_dir("$dir/$FolderOrFile")) { $sizeResult += getDirSize("$dir/$FolderOrFile"); } else { $sizeResult += filesize("$dir/$FolderOrFile"); } } } closedir($handle); return $sizeResult; } //单位自动转换函数 function getRealSize($size) { $kb = 1024; //Kilobyte $mb = 1024 * $kb; //Megabyte $gb = 1024 * $mb; //Gigabyte $tb = 1024 * $gb; //Terabyte if($size < $kb) { return $size." B"; } else if($size < $mb) { return round($size/$kb,2)." KB"; } else if($size < $gb) { return round($size/$mb,2)." MB"; } else if($size < $tb) { return round($size/$gb,2)." GB"; } else { return round($size/$tb,2)." TB"; } } echo getRealSize(getDirSize('D:/AppServ/www/mytest/')); // get byte function dirsize($dir) { $handle=opendir($dir); $size = 0; while ( $file=readdir($handle) ) { if ( ( $file == "." ) || ( $file == ".." ) ) continue; if ( is_dir("$dir/$file") ) $size += dirsize("$dir/$file"); else $size += filesize("$dir/$file"); } closedir($handle); return $size; } $big=dirsize(dirname($_SERVER['SCRIPT_FILENAME'])."/"); echo '('.$big.' bytes)';
Summary: The above is the entire content of this article, I hope It can be helpful to everyone’s study.
How to send HTTP requests through sockets in PHPThe role of php anonymous functions and closuresPHP method to sort two-dimensional array######The above is the detailed content of PHP traverses folders and calculates size. For more information, please follow other related articles on the PHP Chinese website!

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