<?php namespace Phpcmf\Controllers;

class Show extends \Phpcmf\Common
{

    public function img() {
        $url = \Phpcmf\Service::L('input')->get('url');
        $img_info = getimagesize($url);
        $img = $this->https_request($url);
        header('Content-type: image/jpeg');
        return $img;
    }
     //HTTP请求（支持HTTP/HTTPS，支持GET/POST）
    protected function https_request($url, $data = null)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        if (!empty($data)){
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    }
}

<?php namespace Phpcmf\Controllers;

class Show extends \Phpcmf\Common
{

    public function img() {
        $url = \Phpcmf\Service::L('input')->get('url');
        $info = getimagesize($url);
        $img = $this->https_request($url);
        header('Content-type: image/jpeg');
        $imgExt = image_type_to_extension($info[2], false);  //获取文件后缀
	$fun = "imagecreatefrom{$imgExt}";
	$imgInfo = $fun($img); 					//1.由文件或 URL 创建一个新图象。如:imagecreatefrompng ( string $filename )
	//$mime = $info['mime'];
	$mime = image_type_to_mime_type(exif_imagetype($img)); //获取图片的 MIME 类型
	header('Content-Type:'.$mime);
	$quality = 100;
	if($imgExt == 'png') $quality = 9;		//输出质量,JPEG格式(0-100),PNG格式(0-9)
	$getImgInfo = "image{$imgExt}";
	$getImgInfo($imgInfo, null, $quality);	//2.将图像输出到浏览器或文件。如: imagepng ( resource $image )
	imagedestroy($imgInfo);
    }
     //HTTP请求（支持HTTP/HTTPS，支持GET/POST）
    protected function https_request($url, $data = null)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        if (!empty($data)){
            curl_setopt($curl, CURLOPT_POST, 1);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    }
    
	
}

return $img;

echo $img;exit;