/**

* 制作略缩图方法

* @param string $src  文件路径

* @param int $width  生成略缩图的宽度（只设置高度是则为等比例缩放）

* @param int $height  生成略缩图的高度（只设置宽度是则为等比例缩放）

* @param string $filename 生成略缩图图片保存路径

*/

function makeThumb($src, $width = null, $height = null, $filename)

{

    $srcData = getimagesize($src);

    list($srcWidth, $srcHeight, $srcType) = $srcData;

    if (empty($width))

        $width = $srcWidth * ($height / $srcHeight);

    if (empty($height))

        $height = $srcHeight * ($width / $srcWidth);

    switch ($srcType) {

        case '1':

            $imgType = 'gif';

            break;

        case '2':

            $imgType = 'jpeg';

            break;

        case '3':

            $imgType = 'png';

            break;

    }

       $imageCreateFun = 'imagecreatefrom'.$imgType;

       $srcImg = $imageCreateFun($src);

       $destImg = imagecreatetruecolor(intval($width),intval($height));//创建目标尺寸的画布

       imagecopyresampled($destImg, $srcImg,0,0,0,0,$width,$height,$srcWidth,$srcHeight);//将拷贝出二维码并铺满在画布中

       $imagefunc = 'image'.$imgType;

       // header("content-type:image/jpeg;")

       // imagejpeg($destImg);

       $imagefunc($destImg,$filename.'.'.$imgType);

       return $filename.'.'.$imgType;

}

$codePath = '';

$codeImageType = '';

if ((($_FILES["file"]["type"] == "image/jpeg")||($_FILES["file"]["type"] == "image/jpg")||($_FILES["file"]["type"] == "image/png"))&& ($_FILES["file"]["size"] < 2097152))

{

    if($_FILES["file"]["error"] > 0)

    {

        echo "发生错误" . $_FILES["file"]["error"] . ",请找TzSteady<br />";

        exit;

    }else

    {

        move_uploaded_file($_FILES["file"]["tmp_name"],"./code/" . date("Ymd").$_FILES["file"]["name"]);

        $codePath = "./code/" . date("Ymd").$_FILES["file"]["name"];

        $codePath = makeThumb($codePath,300,false,'./code/'.date("YmdHis"));

        $codeImageType = $_FILES["file"]["type"];

    }

}else

{

    echo "<script>

    alert('请上传小于2M的jpg/png/jpeg格式的二维码');

    </script>";

    exit;

}