PHP文件操作功能函数大全

PHP文件操作功能函数大全

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<?php     /* 转换字节大小 */     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];     }       /* 检测文件名称是否合法 */     function checkFilename($filename){         $pattern = "/[\/,\*,<>,\?\|]/";         if(preg_match($pattern,$filename)){             return false;         }else{             return true;         }     }           /* 创建文件 */     function createFile($filename){         if(checkFilename($filename)){             //检测当前目录下是否存在同名的文件             if(!file_exists($filename)){                 //通过touch($filename)来创建                 if(touch($filename)){                     $mes="文件创建成功";                 }else{                     $mes="文件创建失败";                 }             }else{                 $mes="文件已经存在,请重新命名后创建";             }         }else{             $mes="非法文件名";         }         return $mes;     }           /* 重命名文件 */     function renameFile($oldname,$newname){         //验证文件名的合法性         if(checkFilename($newname)){             //检测当前目录下是否存在同名的文件             $path=dirname($oldname);             if(!file_exists($path."/".$newname)){                 //进行重命名                 if(rename($oldname,$path."/".$newname)){                     $mes="重命名成功";                 }else{                     $mes="重命名失败";                 }             }else{                 $mes="存在同名文件,请重新命名";             }         }else{             return $mes="非法文件名";         }         return $mes;     }       /* 删除文件 */     function delFile($filename){         if(unlink($filename)){             $mes="文件删除成功";         }else{             $mes="文件删除失败";         }         return $mes;     }       /* 下载文件操作 */     function downFile($filename){         header("Content-disposition:attachment;filename=".basename($filename));         header("Content-length:".filesize($filename));         readfile($filename);     }           /* 复制文件 */     function copyFile($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 $mes;     }           /* 剪切文件 */     function cutFile($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 $mes;     }           /* 上传文件 */     function uploadFile($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;     } ?>