PHP implements uploading pictures to zimg server_php example

Recently, our project requires an image server to store user avatars. We use zimg to process and store images. Here is a brief introduction on how to use PHP to upload images to zimg and obtain the return information of the corresponding images

Use curl library to implement upload

According to the zimg usage documentation, if we want zimg to return json information, we must upload images through raw_post. The following is the demo code

$upload_url = 'http://192.168.0.99:5000/upload';

$image_file = './test.jpg';

// 获取图片后缀
$value = explode(".", $image_file);
$extension = strtolower(array_pop($value));

// 生成本地临时存储路径，并生成相应文件夹
$dir = 'aurthur';
$save_path = 'uploads/'.$dir.'/'.date('Y').'/'.date('md').'/';
$save_rule = md5(uniqid(mt_rand(), true));
if(!is_dir($save_path)){
  if(false === mkdir($save_path, 0700, true)){
    exit('创建文件夹失败');
  }
}
$save_image_file = $save_path.$save_rule.".$extension";

// 把图片存储到临时路径
file_put_contents($save_image_file, file_get_contents($image_file));

// 获取临时保存的图片的真实地址(绝对路径)
$realpath = realpath($save_image_file);

// 上传图片到 zimg 图片存储服务
$ch = curl_init();

// 将图片内容读取到变量 $post_data ;
$post_data = file_get_contents($realpath);

$headers = array();
// 一定要添加此 header
$headers[] = 'Content-Type:'.$extension;

curl_setopt($ch, CURLOPT_URL, $upload_url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_POST, true); 
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);// raw_post方式

$info = curl_exec($ch);
curl_close($ch);

$json = json_decode($info, true);
$signature = $json['info']['md5'];
echo $signature;

If you want to test the code, please change the uploadurl above to your own zimg server address, and change image_file to the path of the image you need to upload