php对文件夹进行相关操作(遍历、计算大小),
php对文件夹进行相关操作(遍历、计算大小),
为大家分享的第一个操作内容: 遍历并打印指定目录下所有文件
<?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&&--$flag) //负数仍为真 echo ' '; if(is_dir($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 */
#####单目录#####
// 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($handle); } } } list_files('D:/AppServ/www/mytest/shopping/payment');
PHP 对文件进行的第二个操作内容:获得文件夹大小 计算文件
<?php function getDirSize($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)';
以上就是关于php对文件夹的进行的基本操作,希望对大家的学习有所帮助。

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