PHP image upload class, supports adding watermarks and generating thumbnails

Let me share a PHP image upload class written by a netizen, which supports adding watermarks and generating thumbnails. The following is the configuration and some information that can be obtained (each configuration information has a default value, and it does not need to be configured if there is no special need):

The code is as follows

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/*------ -------------------------------------------------- --------------------------
*
*----------------- -------------------------------------------------- ---------------
*/
class image_up{
//Define basic parameters
private $uptype=array('image/jpg',' image/jpeg','image/png','image/pjpeg','image/gif','image/bmp','image/x-png'); //Upload file type
private $max_file_size= 102400; //Upload size limit (unit: KB)
private $destination_folder="up/"; //Upload file path
private $watermark=1; //Whether to attach a watermark
private $watertype= 1; // Watermark type (1 is text, 2 is picture)
private $waterposition=1; to center);
private $waterstring=null; //Watermark string
private $waterimg=null; , others are not generated);
private $imgpreviewsize=1; //Preview ratio, 0 is displayed according to fixed width and height, others are displayed proportionally
private $imgwidth=200; //Preview fixed width
private $imgheight=200; //Preview fixed height
//++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++
private $imgthu=1; //Whether to generate and save Thumbnails, 1 means generated, 0 means not generated
private $imgthu_folder=null; //Thumbnail saving path, the default is the same as the file path
private $imgthu_fixed=0; Bid -high, 1 is used, 0 is flexible change
Private $ Imgthu_width = 200; // The width of the slightly shrinkage
Private $ Imgthu_height = 200; // Summary diagram height

Private $ Imgthu_name =null; //Thumbnail name
//************************************ *************************************************** ******************************
private $inputname="upfile"; //File upload box name
// *************************************************** *************************************************** ****************
private $img_preview_display; //Image preview display
//****************** *************************************************** ************************************************
/ /File upload related information, 1 means the file does not exist, 2 means the type does not match, 3 means the size limit is exceeded, 4 means the upload failed, 0 means the upload was successful
private $file_up_info=null;
//+++ ++++++++++++++++++++++++++++++++++++++++++++++++ ++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++
//The basic information of the uploaded file can be obtained externally
private $file_name; //The original name of the client file
private $file_type; MIME type
private $file_size; //Size of uploaded file, unit/byte
private $file_tmp_name; //Stored temporary file name
private $file_error; //Error code related to file upload

private $img_size; // Get the length and width of the image
private $file_basename; // Get the full name with extension
private $file_extension; // Get the file extension
private $filename; //File name (without extension)
private $destination; //Ask price path plus name
//********************** *************************************************** *******************************************
public function __set( $propety_name,$value){
$this->$propety_name=$value;
}
public function __get($property_name){
if(isset($this->$property_name ))
return($this->$property_name);
else return(NULL);
}
//**************** *************************************************** ************************************************
//Define the file upload function
public function up(){
//Judge whether the file exists
if(!is_uploaded_file($_FILES[$this->inputname]["tmp_name"])) {
$this->file_up_info=1;
return;
}
//Get and assign the corresponding basic parameters
$upfile=$_FILES[$this->inputname];
$this->file_name=$upfile["name"];
$this->file_type=$upfile["type"];
$this->file_size=$upfile[" size"];
$this->file_tmp_name=$upfile["tmp_name"];
$this->file_error=$upfile["error"];
//Check whether the file type matches
if(!in_array($this->file_type,$this->uptype)){
$this->file_up_info=2;
return;
}
// Check if the file size exceeds the limit
if($this->file_size>$this->max_file_size){
$this->file_up_info=3;
return;
}
//Determine whether the directory exists
if(!file_exists($this->destination_folder))
mkdir($this->destination_folder);
//Further obtain the image information and assign the value
$this->img_size=getimagesize($this->file_tmp_name);
$pathinfo=pathinfo($this->file_name);
$this->file_extension=$pathinfo["extension"] ; //Get the file extension
$this->file_basename=$pathinfo["basename"]; //Get the full name with extension
$this->filename=$pathinfo["filename" ; ".".$this->file_extension;
//Determine whether the file name exists, if it exists, rename it
$n=1;
while (file_exists($this->destination)) {
while (file_exists($this->destination)){
$n++;
$this->filename=$this->filename."(".$n.")" ;
$this->destination = $this->destination_folder.$this->filename.".".$this->file_extension;
}
$this->filename= $filename2."(".$n.")";
$this->destination = $this->destination_folder.$this->filename.".".$this->file_extension;
}
//Move the uploaded file
if(move_uploaded_file($this->file_tmp_name,$this->destination))
$this->file_up_info=0;
else $this->file_up_info=4;

//Add watermark
if($this->watermark==1){
$this->imgthu();
}
//Generate thumbnail image
if($this->imgthu==1){
$this->add_watermark();
}
//Generate preview image
if($this->imgpreviewsize == 0){
if($this->img_size["0"]<$this->imgwidth) $this->imgwidth=$this ->img_size["0"];
   if($this->img_size["1"]<$this->imgheight) $this->imgheight=$this->img_size["1"];
  }else{
   $this->imgwidth=$this->img_size["0"]*$this->imgpreviewsize;
   $this->imgheight=$this->img_size["1"]*$this->imgpreviewsize;
  }
  $this->img_preview_display="                                    alt="图片预览：r文件名"：$this->file_tmp_name />";
}
//====================================================================================================================
//====================================================================================================================
//生成略缩图功能
function imgthu(){
  if($this->imgthu_folder==null)
    $this->imgthu_folder=$this->destination_folder;

  //$this->imgthu_name=$this->filename."_t.".$this->file_extension;
  $imgthu_name_b=$this->filename."_t";
  $imgthu_name_b2=$this->filename."_t";
  $destination_b=$this->imgthu_folder.$imgthu_name_b.".".$this->file_extension;
     //判断文件名是否存在，如果存在则重命名
  $n=1;
  while (file_exists($destination_b)){
   while (file_exists($destination_b)){
    $n++;
    $imgthu_name_b=$imgthu_name_b."(".$n.")";
    $destination_b = $this->imgthu_folder.$imgthu_name_b.".".$this->file_extension;
   }
   $imgthu_name_b=$imgthu_name_b2."(".$n.")";
   $destination_b = $this->imgthu_folder.$imgthu_name_b.".".$this->file_extension;
  }


  $imginfo=getimagesize($this->destination);
  switch($imginfo[2])
  {
   case 1:
    $in=@imagecreatefromgif($this->destination);
    break;
   case 2:
    $in=@imagecreatefromjpeg($this->destination);
    break;
   case 3:
    $in=@imagecreatefrompng($this->destination);
    break;
   case 6:
    $in =@imagecreatefrombmp($this->destination);
    break;
   default:
    break;
  }
  //计算略缩图长宽
  if($this->imgthu_fixed==0){
   if($this->imgthu_height>($imginfo[1]/$imginfo[0])*$this->imgthu_width)
    $this->imgthu_width = ($imginfo[0]/$imginfo[1])*$this->imgthu_height;
   else
    $this->imgthu_height=($imginfo[1]/$imginfo[0])*$this->imgthu_width;
  }
  $new = imageCreateTrueColor($this->imgthu_width,$this->imgthu_height);
  ImageCopyResized($new,$in,0,0,0,0,$this->imgthu_width,$this->imgthu_height,$imginfo[0],$imginfo[1]);
  switch ($imginfo[2])
  {
   case 1:
    imagejpeg($new,$destination_b);
    break;
   case 2:
    imagejpeg($new,$destination_b);
    break;
   case 3:
    imagepng($new,$destination_b);
    break;
   case 6:
    imagewbmp($new,$destination_b);
    break;
  }
}
//====================================================================================================================
//====================================================================================================================
//添加水印功能
function add_watermark(){
//1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF, 5 = PSD, 6 = BMP, 7 = TIFF (intel byte order),
//8 = TIFF (motorola byte order), 9 = JPC, 10 = JP2, 11 = JPX, 12 = JB2, 13 = SWC, 14 = IFF, 15 = WBMP, 16 = XBM.
$imginfo=getimagesize($this->destination);
$im=imagecreatetruecolor($this->img_size[0],$this->img_size[1]); //Create true color
$white=imagecolorallocate($im,255,255,255); ,0);
//Perform area filling with color at the coordinates x, y of the image (the upper left corner of the image is 0, 0) (that is, points with the same color as the x, y points and adjacent points will be filled ).
imagefill($im,0,0,$white);

switch($imginfo[2])

{

case 1:
$simage =imagecreatefromgif($this ->destination); // Create a new image from a file or URL
break;
case 2:
$simage =imagecreatefromjpeg($this->destination);
break;
case 3:
$simage =imagecreatefrompng($this->destination);
break;
case 6:
$simage =imagecreatefromwbmp($this->destination);
break;
default:
echo ("Unsupported file type");
break;
}
if(!empty($simage))
{
//Position setting
if($this->watertype==1){
$str_len=strlen($this->waterstring);
$str_width=$str_len*10;
        $str_height=20;
         elseif($this->watertype==1 && file_exists($this->waterimg)){
      $iinfo=getimagesize($this->waterimg);
$str_width = $iinfo[0];
$str_height = $iinfo[1];
}

switch ($this->waterposition){
case 1:
$p_x=5;
$p_y=$this->img_size[1]-$str_height;
break;
case 2:
$p_x=$this->img_size[ 0]-$str_width;
$p_y=$this->img_size[1]-$str_height;
break;
case 3:
$p_x=5;
$p_y= 0;
break;
case 4:
$p_x=$this->img_size[0]-$str_width;
$p_y=5;
case 5 :
$p_x=($this->img_size[0]-$str_width)/2;
$p_y=($this->img_size[1]-$str_height)/2;
break;
}
imagecopy($im,$simage,0,0,0,0,$this->img_size[0],$this->img_size[1]); //Copy the image Part of
//imagefilledrectangle($im,1,$this->img_size[1]-15,130,$this->img_size[1],$white); //Color the closed rectangular area of the image

switch($this->watertype)
{

case 1: //Add watermark string

imagestring($im,10,$p_x,$p_y,$this-> ;waterstring,$red);
break;
case 2: //watermark image
$simage1 =imagecreatefromgif($this->waterimg);
imagecopy($im,$simage1, 0,0,0,0,85,15);
imagedestroy($simage1);
break;
}

switch ($imginfo[2])
{
case 1:
//imagegif($nimage, $destination);
imagejpeg($im, $this->destination) ;
break;
case 2:
imagejpeg($im, $this->destination);
break;
case 3:
imagepng($im, $this- >destination);
break;
case 6:
imagewbmp($im, $this->destination);
break;
}
//Overwrite the original uploaded file
imagedestroy($im);
imagedestroy($simage);
}
}
}
?>