PHP异步协程开发：优化图片处理的效率与质量

use SwooleCoroutine;
use SwooleCoroutineHttpClient;
use SwooleCoroutineSystem;

//定义图片处理异步协程
Coroutine::create(function() {
    //异步读取图片文件，获取图片信息
    $data = System::readFile('/path/to/image.jpg');
    $info = getimagesizefromstring($data);
  
    //异步使用swoole的方式缩放图片大小
    $client = new Client('www.example.com', 443, true);
    $client->setHeaders(['Host' => 'www.example.com']);
    $client->set(['timeout' => 1]);
    $client->get('/');
    $image = $client->recv();
    System::writeFile('/path/to/resize_image.jpg', $image);  

    //异步使用swoole对图片添加水印
    $client = new Client('www.example.com', 443, true);
    $client->setHeaders(['Host' => 'www.example.com']);
    $client->set(['timeout' => 1]);
    $client->get('/');
    $image = $client->recv();
    System::writeFile('/path/to/watermark_image.jpg', $image);      
});

//继续执行其他的协程任务
Coroutine::create(function(){
    //其他协程任务代码
});

use SwooleCoroutine;
use SwooleCoroutineSystem;

//定义图片处理异步协程
Coroutine::create(function() {
    //异步读取图片文件，获取图片信息
    $data = System::readFile('/path/to/image.jpg');
    $image = imagecreatefromstring($data);

    //异步使用Gd库对图片进行压缩
    $image_compress = imagecreatetruecolor(400, 400);
    imagecopyresampled($image_compress, $image, 0, 0, 0, 0, 400, 400, $info[0], $info[1]);
    imagedestroy($image);
    imagejpeg($image_compress, '/path/to/compressed_image.jpg', 90);
    imagedestroy($image_compress);
});

//继续执行其他的协程任务
Coroutine::create(function(){
    //其他协程任务代码
});