File upload class

Class yl_upload_class
{
#*************************************** ******************
# Create a directory function
#*************************************** ******************
Function createfolder ($ yl_path)
{
If (! File_exists ($ yl_path ))
   {
$ This-> createfolder (dirname ($ yl_path ));
@ Mkdir ($ yl_path, 0777 );
   }
Return $ this-> createfolder;
}
#*************************************** ******************
# Get the file name, size, type, and temporary file name
#*************************************** ******************
Function yl_getfilename ($ yl_type)
{
Global $ yl_filedata, $ yl_directroy, $ yl_settingsnew;
Global $ yl_maxsize, $ yl_sizeformat, $ yl_arrext, $ yl_ext;
Return $ _ FILES [$ yl_filedata] [$ yl_type];
}
#*************************************** ******************
# Getting the file size
#*************************************** ******************
Function yl_getfilesize ()
{
Global $ yl_filedata, $ yl_directroy, $ yl_settingsnew;
Global $ yl_maxsize, $ yl_sizeformat, $ yl_arrext, $ yl_ext;
If ($ this-> yl_getfilename ('size') = 0 ){
$ This-> alert ("Select Upload file! ");
Exit;
   }
If ($ this-> yl_getfilename ('size')> $ yl_maxsize ){
$ Yl_maxsizek = $ yl_maxsize/1024;
$ This-> alert ("the file to be uploaded exceeds the limit $ yl_maxsizek.K! ");
Exit;
   }
Switch (strtolower ($ yl_sizeformat )){
Case 'B ':
Return $ this-> yl_getfilename ('size'). 'B ';
Break;
Case 'K ':
Return ($ this-> yl_getfilename ('size')/1024). 'K ';
Break;
Case'm ':
Return ($ this-> yl_getfilename ('size')/(1024*1024). 'M ';
   }
}
#*************************************** ******************
# Obtain the file extension
#*************************************** ******************
Function yl_getfiletype ()
{
Global $ yl_filedata, $ yl_directroy, $ yl_settingsnew;
Global $ yl_maxsize, $ yl_sizeformat, $ yl_arrext, $ yl_ext;
$ Yl_temp_arr = explode (".", $ this-> yl_getfilename ('name '));
$ Yl_file_ext = array_pop ($ yl_temp_arr );
$ Yl_file_ext = trim ($ yl_file_ext );
$ Yl_file_ext = strtolower ($ yl_file_ext );
// Check the extension
If (in_array ($ yl_file_ext, $ yl_arrext) === false ){
$ This-> alert ("the Upload file type is limited! ");
Exit;
     }
Return $ yl_file_ext;
}
#*************************************** ******************
# Upload
#*************************************** ******************
Function yl_uploadfile ()
{
Global $ yl_filedata, $ yl_directroy, $ file_urldirectroy, $ yl_settingsnew;
Global $ yl_maxsize, $ yl_sizeformat, $ yl_arrext, $ yl_ext;
$ Yl_file_nameold = $ this-> yl_getfilename ('name'); // original file name
$ Yl_file_namenews = date ('ymmd'). '_'. md5 (date ('ymdhis '); // rename
If ($ yl_ext = 0 ){
$ Yl_file_names = $ yl_file_namenews. '.'. $ this-> yl_getfiletype (); // rename
} Elseif ($ yl_ext = 1 ){
$ Yl_file_names = policyl_file_namenews.'.jpg '; // change the name to jpg.
      }
$ Yl_tmp_name = $ this-> yl_getfilename ('tmp _ name'); // temporary file name on the server
$ Yl_file_size = $ this-> yl_getfilesize (); // get the file size
$ Yl_file_type = $ this-> yl_getfiletype (); // Obtain the file type
$ Yl_file_path = $ yl_directroy. '/'. $ yl_settingsnew; // create a directory
// Check whether the directory exists. If the directory does not exist, create
If (@ is_dir ($ yl_file_path) === false ){
$ This-> createfolder (''. $ yl_file_path.''); // create a directory
     }
// Check whether the object has been uploaded
If (@ is_uploaded_file ($ yl_tmp_name) === false ){
$ This-> alert ("The file has been uploaded! ");
Exit;
   }
// Check the directory write permission
If (@ is_writable ($ yl_file_path) === false ){
$ This-> alert ("the upload Directory has no write permission! ");
Exit;
     }
$ Yl_doupload = @ copy ($ yl_tmp_name, ''. $ yl_file_path. '/'. $ yl_file_names .'');
If ($ yl_doUpload === false)
   {
$ This-> alert ("Upload failed! ");
} Else {
Echo 'upload successful ';
Echo '<br> ';
Echo 'file Directory: '. $ yl_file_path .'';
Echo '<br> ';
Echo 'original File name: '. $ yl_file_nameold .'';
Echo '<br> ';
Echo 'new File name: '. $ yl_file_names .'';
Echo '<br> ';
Echo 'file size: '. $ yl_file_size .'';
Echo '<br> ';
Echo 'file type: '. $ yl_file_type .'';
   }
Return;
}
#*************************************** ******************
# * Delete an object
#*************************************** ******************
Function delfile ()
{
Global $ yl_filedata, $ yl_directroy, $ yl_settingsnew;
Global $ yl_maxsize, $ yl_sizeformat, $ yl_arrext, $ yl_ext;
$ Yl _ dir = dirname (trim ($ yl_directroy ));
If ($ this-> _ isDel ($ yl _ dir ))
   {
Return @ unlink ($ yl_directroy )? True: false;
} Else {
Return false;
   }
}
#*************************************** ******************
# Deleting files in a directory cannot be deleted
#*************************************** ******************
Function deldir ()
{
Global $ yl_filedata, $ yl_directroy, $ yl_settingsnew;
Global $ yl_maxsize, $ yl_sizeformat, $ yl_arrext, $ yl_ext;
If ($ this-> _ isdel ($ yl_directroy) & is_dir ($ yl_directroy ))
   {
Return @ rmdir ($ yl_directroy )? True: false;
} Else {
Return false;
   }
}
#*************************************** ******************
# Prompt
#*************************************** ******************
Function alert ($ yl_msg)
{
Echo 'Echo 'Echo '<title> error </title> ';
Echo '<meta http-equiv = "content-type" c> ';
Echo 'Echo '<body> ';
Echo '<script type = "text/javascript"> alert ("'. $ yl_msg. '"); </script> ';
Echo '</body> ';
Echo 'Exit;
}
}
?>