PHP文件操作的经典案例

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<?php     /* 遍历目录函数,只读取目录的最外层的内容 */     function readDirectory($path){         $handle = opendir($path);         while(($item = readdir($handle))!== false){             //.和..这2个特殊的目录             if($item!="."&&$item!=".."){                 if(is_file($path."/".$item)){                     $arr["file"][]=$item;                 }                 if(is_dir($path."/".$item)){                     $arr["dir"][]=$item;                 }             }         }         closedir($handle);         return $arr;     }           /* 获取文件夹大小 */     function dirSize($path){         $sum=0;         global $sum;         $handle=opendir($path);         while(($item=readdir($handle))!==false){             if($item!="."&&$item!=".."){                 if(is_file($path."/".$item)){                     $sum+=filesize($path."/".$item);                 }                 if(is_dir($path."/".$item)){                     $func=__FUNCTION__;                     $func($path."/".$item);                 }             }         }         closedir($handle);         return $sum;     }       /* 检测文件夹名称是否合法 */     function checkFilename($filename){         $pattern = "/[\/,\*,<>,\?\|]/";         if(preg_match($pattern,$filename)){             return false;         }else{             return true;         }     }           /* 创建文件夹 */     function createFolder($dirname){         //检测文件夹名称是否合法         if(checkFilename(basename($dirname))){             //当前目录下是否存在同名文件夹名称             if(!file_exists($dirname)){                 if(mkdir($dirname,0777,true)){                     $mes="文件夹创建成功";                 }else{                     $mes="文件夹创建失败";                 }             }else{                 $mes="存在相同文件夹名称";             }         }else{             $mes="非法文件夹名称";         }         return $mes;     }           /* 重命名文件夹 */     function renameFolder($oldname,$newname){         //检测文件夹名称是否合法         if(checkFilename(basename($newname))){             //检测当前目录下是否存在同名文件夹名称             if(!file_exists($newname)){                 if(rename($oldname,$newname)){                     $mes="重命名成功";                 }else{                     $mes="重命名失败";                 }             }else{                 $mes="存在同名文件夹";             }         }else{             $mes="非法文件夹名称";         }         return $mes;     }           /* 复制文件夹 */     function copyFolder($src,$dst){         if(!file_exists($dst)){             mkdir($dst,0777,true);         }         $handle=opendir($src);         while(($item=readdir($handle))!==false){             if($item!="."&&$item!=".."){                 if(is_file($src."/".$item)){                     copy($src."/".$item,$dst."/".$item);                 }                 if(is_dir($src."/".$item)){                     $func=__FUNCTION__;                     $func($src."/".$item,$dst."/".$item);                 }             }         }         closedir($handle);         return "复制成功";     }           /* 剪切文件夹 */     function cutFolder($src,$dst){         if(file_exists($dst)){             if(is_dir($dst)){                 if(!file_exists($dst."/".basename($src))){                     if(rename($src,$dst."/".basename($src))){                         $mes="剪切成功";                     }else{                         $mes="剪切失败";                     }                 }else{                     $mes="存在同名文件夹";                 }             }         }else{             $mes="目标文件夹不存在";         }         return $mes;     }           /* 删除文件夹 */     function delFolder($path){         $handle=opendir($path);//打开目录，获取句柄         while(($item=readdir($handle))!==false){//读取句柄资源             if($item!="."&&$item!=".."){                 if(is_file($path."/".$item)){                     unlink($path."/".$item);                 }                 if(is_dir($path."/".$item)){                     $func=__FUNCTION__;//自身函数名称                     $func($path."/".$item);                 }             }         }         closedir($handle);         rmdir($path);//删除目录，目录必须为空才能删除         return "文件夹删除成功";     } ?>