PHP实现上传图片到 zimg 服务器

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