最近在做人工智慧人臉識別的小程式，每張照片都應有一個唯一的字串。這裡我們採用guid來生成唯一的字串。

// 生成guid
function guid(){
    if (function_exists('com_create_guid')) {
        return com_create_guid();
    }else{
        mt_srand((double)microtime()*10000);
        $charid = strtoupper(md5(uniqid(rand(),true)));
        $hyphen = chr(45);
        $uuid = chr(123)
                .substr($charid,0,8).$hyphen
                .substr($charid,8,4).$hyphen
                .substr($charid,12,4).$hyphen
                .substr($charid,16,4).$hyphen
                .substr($charid,20,12)
                .chr(125);
        return $uuid;
    }
}

// 生成可用的guid
function myguid(){
    $guid = guid();
    $guid = trim($guid,'{}');
    $guid = str_replace('-', '_', $guid);
    return $guid;
}
 

然後寫請求，獲取access_token，我們發現百度雲給的程式碼有些不對，我給大家分享一下正確的程式碼，程式碼如下：

function https_post($url = '', $param = '') {  
  
    // return 123;  
        if (empty($url) || empty($param)) {  
            return false;  
        }  
          
        $postUrl = $url;  
        $curlPost = $param;  
        $curl = curl_init();//初始化curl  
        curl_setopt($curl, CURLOPT_URL,$postUrl);//抓取指定網頁  
        curl_setopt($curl, CURLOPT_HEADER, 0);//設定header  
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);//要求結果為字串且輸出到螢幕上  
        curl_setopt($curl, CURLOPT_POST, 1);//post提交方式  
        curl_setopt($curl, CURLOPT_POSTFIELDS, $curlPost);  
        curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,false);  
        curl_setopt($curl,CURLOPT_SSL_VERIFYHOST,false);  
        curl_setopt($curl,CURLOPT_SSLVERSION,1);  
        $data = curl_exec($curl);//執行curl  
        curl_close($curl);  
          
        return $data;  
    }  
  
    function access_token(){  
        $file= __DIR__.'.\access_token';  
        if(file_exists($file)){  
            $str=file_get_contents($file);  
            try{  
                $arr=json_decode($str,true);  
                if(is_array($arr)){  
                    $totime=$arr['totime'];  
                    if($totime>time()){  
                        return $arr['access_token'];  
                    }  
                }  
            }catch(Exception $e){  
  
            }  
        }  
        $url = 'https://aip.baidubce.com/oauth/2.0/token';  
        $post_data['grant_type']       = 'client_credentials';  
        $post_data['client_id']      = 'xx';  
        $post_data['client_secret'] = 'xx';  
        $o = "";  
        foreach ( $post_data as $k => $v )   
        {  
            $o.= "$k=" . urlencode( $v ). "&" ;  
        }  
        $post_data = substr($o,0,-1);  
          
        $res = https_post($url, $post_data);  
  
       $arr=json_decode($res,true);  
       if(isset($arr['access_token']) && isset($arr['expires_in'])){  
        $data['access_token']=$arr['access_token'];  
        $data['totime']=time()+$arr['expires_in']-3600;  
        file_put_contents($file,json_encode($data));  
        return $arr['access_token'];  
       }else{  
        return false;  
       }  
    }  
 

我把access_token放在了一個檔案中，儲存起來。

我在後臺呼叫了這些方法，程式碼如下：

public function facevalid(){  
        $token = access_token();  
        // echo $token;  
  
        $file = './Uploads/1.jpg';  
        if (!file_exists($file)) {  
            die('檔案不存在！');  
        }  
  
  
  
  
         $url="https://aip.baidubce.com/rest/2.0/face/v2/detect?access_token=".$token;  
            $img=file_get_contents($file);  
            $img=base64_encode($img);  
            // echo $img;      
            $bodys=array(  
               'max_face_num'=>5,  
               'face_fileds'=>"age,beauty,expression,faceshape,gender,galsses,landmark,race,qualities",  
               'image'=>$img  
              );  
            $res=request_post($url,$bodys);  
            echo $res;  
           }  
}