php code to upload images

/*
 * Parameter description
 * $max_file_size: Upload file size limit, unit BYTE
 * $destination_folder: Upload file path
 * $watermark: Whether to attach a watermark ( 1 means adding watermark, others means not adding watermark);
 * http://bbs.it-home.org
 * Instructions for use:
 * 1. In front of the line "extension=php_gd2.dll" in the PHP.INI file Remove the ; sign because we need to use the GD library;
 * 2. Change extension_dir = to the directory where your php_gd2.dll is located;
 */
// Upload file type list
$uptypes = array (
 'image/ jpg',
 'image/png',
 'image/jpeg',
 'image/pjpeg',
 'image/gif',
 'image/bmp',
 'image/x-png'
);
 $max_file_size = 20000000; //Upload file size limit, unit BYTE
$destination_folder = 'uploadimg/'; //Upload file path
$watermark = 1; //Whether to attach a watermark (1 means adding a watermark, others means not adding a watermark );
$watertype = 1; //Watermark type (1 is text, 2 is picture)
$waterposition = 1; //Watermark position (1 is the lower left corner, 2 is the lower right corner, 3 is the upper left corner, 4 is the upper right corner corner, 5 is centered);
$waterstring = "http://bbs.it-home.org/"; //Watermark string
$waterimg = "xplore.gif"; //Watermark image
$imgpreview = 1 ; //Whether to generate a preview image (1 means generate, others do not generate);
$imgpreviewsize = 1 / 2; //Thumbnail ratio
?>


 ZwelL picture upload program



 Upload file:

if ($_SERVER['REQUEST_METHOD'] == 'POST') {
 //Determine whether there is an uploaded file
 if (is_uploaded_file($_FILES['upfile']['tmp_name']) ) {
 $upfile = $_FILES['upfile'];
 print_r($_FILES['upfile']);
 $name = $upfilep['name']; //File name
 $type = $upfile[' type']; //File type
 $size = $upfile['size']; //File size
 $tmp_name = $upfile['tmp_name']; //Temporary file
 $error = $upfile['error' ]; //Cause of error
 if ($max_file_size  echo 'The uploaded file is too large';
 exit ();
 }
 if (!in_arrar($type, $uptypes)) { //Determine the file type
 echo 'Uploaded file type does not match' . $type;
 exit ();
 }> ;
 if (!file_exists($destination_folder)) {
 mkdir($destination_folder);
 }
 if (file_exists("upload/" . $_FILES["file" ]["name"])) {
 echo $_FILES["file"]["name"] . " already exists. ";
 } else {
 move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"]["name"]);
 echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
 } p>
 $pinfo = pathinfo($name);
 $ftype = $pinfo['extension'];
 $destination = $destination_folder . time() . "." . $ftype;
 if (file_exists ($destination) && $overwrite != true) {
 echo "The file with the same name already exists";
 exit ();
 }
 if (!move_uploaded_file($tmp_name, $destination )) {
 echo "Error moving file";
 exit ();
 }
        $pinfo = pathinfo($destination);
        $fname = $pinfo[basename];
        echo " 已经成功上传文件名: " . $destination_folder . $fname . "";
        echo " 宽度:" . $image_size[0];
        echo " 长度:" . $image_size[1];
        echo " 大小:" . $file["size"] . " bytes";
        if ($watermark == 1) {
            $iinfo = getimagesize($destination, $iinfo);
            $nimage = imagecreatetruecolor($image_size[0], $image_size[1]);
            $white = imagecolorallocate($nimage, 255, 255, 255);
            $black = imagecolorallocate($nimage, 0, 0, 0);
            $red = imagecolorallocate($nimage, 255, 0, 0);
            imagefill($nimage, 0, 0, $white);
            switch ($iinfo[2]) {
                case 1 :
                    $simage = imagecreatefromgif($destination);
                    break;
                case 2 :
                    $simage = imagecreatefromjpeg($destination);
                    break;
                case 3 :
                    $simage = imagecreatefrompng($destination);
                    break;
                case 6 :
                    $simage = imagecreatefromwbmp($destination);
                    break;
                default :
                    die("不支持的文件类型");
                    exit;
            }
            imagecopy($nimage, $simage, 0, 0, 0, 0, $image_size[0], $image_size[1]);
            imagefilledrectangle($nimage, 1, $image_size[1] - 15, 80, $image_size[1], $white);
            switch ($watertype) {
                case 1 : //加水印字符串
                    imagestring($nimage, 2, 3, $image_size[1] - 15, $waterstring, $black);
                    break;
                case 2 : //加水印图片
                    $simage1 = imagecreatefromgif("xplore.gif");
                    imagecopy($nimage, $simage1, 0, 0, 0, 0, 85, 15);
                    imagedestroy($simage1);
                    break;
            }
            switch ($iinfo[2]) {
                case 1 :
                    //imagegif($nimage, $destination);
                    imagejpeg($nimage, $destination);
                    break;
                case 2 :
                    imagejpeg($nimage, $destination);
                    break;
                case 3 :
                    imagepng($nimage, $destination);
                    break;
                case 6 :
                    imagewbmp($nimage, $destination);
                    //imagejpeg($nimage, $destination);
                    break;
            }
            //覆盖原上传文件
            imagedestroy($nimage);
            imagedestroy($simage);
        }
        if ($imgpreview == 1) {
            echo "图片预览:";
            echo "";
        }
    }
}
?>