<?php //Bytes/Kb/MB/GB/TB/EB
/*** 转换字节大小* @param number $size* @return number*/
function transByte($size) {$arr = array ("B", "KB", "MB", "GB", "TB", "EB" );$i = 0;while ( $size >= 1024 ) {$size /= 1024;$i ++;}return round ( $size, 2 ) . $arr [$i];
}/*** 创建文件* @param string $filename* @return string*/
function createFile($filename) {//file/1.txt//验证文件名的合法性,是否包含/,*,<>,?,|$pattern = "/[\/,\*,<>,\?\|]/";if (! preg_match ( $pattern, basename ( $filename ) )) {//检测当前目录下是否存在同名文件if (! file_exists ( $filename )) {//通过touch($filename)来创建if (touch ( $filename )) {return "文件创建成功";} else {return "文件创建失败";}} else {return "文件已存在，请重命名后创建";}} else {return "非法文件名";}
}/*** 重命名文件* @param string $oldname* @param string $newname* @return string*/
function renameFile($oldname,$newname){
//    echo $oldname,$newname;
//验证文件名是否合法if(checkFilename($newname)){//检测当前目录下是否存在同名文件$path=dirname($oldname);if(!file_exists($path."/".$newname)){//进行重命名if(rename($oldname,$path."/".$newname)){return "重命名成功";}else{return "重命名失败";}}else{return "存在同名文件，请重新命名";}}else{return "非法文件名";}}/***检测文件名是否合法* @param string $filename* @return boolean*/
function checkFilename($filename){$pattern = "/[\/,\*,<>,\?\|]/";if (preg_match ( $pattern,  $filename )) {return false;}else{return true;}
}/*** 删除文件* @param string $filename* @return string*/
function delFile($filename){if(unlink($filename)){$mes="文件删除成功";}else{$mes="文件删除失败";}return $mes;
}/*** 下载文件操作* @param string $filename*/
function downFile($filename){header("content-disposition:attachment;filename=".basename($filename));header("content-length:".filesize($filename));readfile($filename);
}/*** 复制文件* @param string $filename* @param string $dstname* @return string*/
function copyFile($filename,$dstname){if(file_exists($dstname)){if(!file_exists($dstname."/".basename($filename))){if(copy($filename,$dstname."/".basename($filename))){$mes="文件复制成功";}else{$mes="文件复制失败";}}else{$mes="存在同名文件";}}else{$mes="目标目录不存在";}return $mes;
}function cutFile($filename,$dstname){if(file_exists($dstname)){if(!file_exists($dstname."/".basename($filename))){if(rename($filename,$dstname."/".basename($filename))){$mes="文件剪切成功";}else{$mes="文件剪切失败";}}else{$mes="存在同名文件";}}else{$mes="目标目录不存在";}return $mes;
}/*** 上传文件* @param array $fileInfo* @param string $path* @param array $allowExt* @param int $maxSize* @return string*/
function uploadFile($fileInfo,$path,$allowExt=array("gif","jpeg","jpg","png","txt"),$maxSize=10485760){//判断错误号if($fileInfo['error']==UPLOAD_ERR_OK){//文件是否是通过HTTP POST方式上传上来的if(is_uploaded_file($fileInfo['tmp_name'])){//上传文件的文件名，只允许上传jpeg|jpg、png、gif、txt的文件//$allowExt=array("gif","jpeg","jpg","png","txt");$ext=getExt($fileInfo['name']);$uniqid=getUniqidName();$destination=$path."/".pathinfo($fileInfo['name'],PATHINFO_FILENAME)."_".$uniqid.".".$ext;if(in_array($ext,$allowExt)){if($fileInfo['size']<=$maxSize){if(move_uploaded_file($fileInfo['tmp_name'], $destination)){$mes="文件上传成功";}else{$mes="文件移动失败";}}else{$mes="文件过大";}}else{$mes="非法文件类型";}}else{$mes="文件不是通过HTTP POST方式上传上来的";}}else{switch($fileInfo['error']){case 1:$mes="超过了配置文件的大小";break;case 2:$mes="超过了表单允许接收数据的大小";break;case 3:$mes="文件部分被上传";break;case 4:$mes="没有文件被上传";break;}}return $mes;}