public function img()
{
//实例化图像处理类，默认为GD库
$image = new Image();
//加载一张预处理的图片
$image->open('./Public/images/1.jpg');
//上面两句，可以用一句话包含
//$image = new Image(Image::IMAGE_GD, './Public/images/1.jpg');
//获取图片信息
$arr['width'] = $image->width();
$arr['height'] = $image->height();
$arr['type'] = $image->type();
$arr['mime'] = $image->mime();
$arr['size'] = $image->size();
//裁剪图片，高400，宽400
$image->crop(400, 400)->save('./Public/images/1.jpg');
$image->open('./Public/images/2.jpg');
$image->thumb(300, 300, Image::IMAGE_THUMB_CENTER)->save('./Public/images/2.jpg');
//在图片右下角添加水印并生成
$image->open('./Public/images/3.jpg');
$image->water('./Public/images/logo.png')->save('./Public/images/3.jpg');
echo '<pre>' . print_r($arr, 1) . '</pre>';
}
public function imginfo()
{
$path = './Public/images/demo.jpg';
$image = new Image(Image::IMAGE_GD, $path);
dump(['width' => $image->width(), 'height' => $image->height(), 'mime' => $image->mime(), 'type' => $image->type()]);
}