基于TP3.2版人脸识别函数

获取人的脸部特征信息，得到一组特征数组
第一步，在百度开发者中心申请人脸识别接口，具体步骤查询百度
第二步，申请成功后记下API Key和Secret Key
第三步，在框架/Library/Org/Util/目录下建立Baidu.class.php代码如下
/**********************************************************
*Author: dtnet([e-mail])
*Time: 2014-6-5下午5:35:13
*File: Bdauth.class.php
**********************************************************/
namespace Org\Util;

class Baidu {
public static $BD_OAUTH2_ENDPOINTS = array (
'authorize' => 'https://openapi.baidu.com/oauth/2.0/authorize',
'token' => 'https://openapi.baidu.com/oauth/2.0/token',
'logout' => 'https://openapi.baidu.com/connect/2.0/logout',
'face'=>'https://openapi.baidu.com/rest/2.0/media/v1/face/detect'
);
protected $clientId;
protected $clientSecret;
protected $redirectUri;
public function __construct($clientId, $clientSecret) {
$this->clientId = $clientId;
$this->clientSecret = $clientSecret;
}
public function setRedirectUri($redirectUri) {
if (empty ( $redirectUri )) {
$redirectUri = $this->getCurrentUrl ();
}
$this->redirectUri = $redirectUri;
return $this;
}
public function getRedirectUri() {
return $this->redirectUri;
}
public function getLogoutUrl($accessToken, $next = '') {
$params = array ('access_token' => $accessToken,'next' => $next ? $next : $this->getCurrentUrl ()
);
return self::$BD_OAUTH2_ENDPOINTS ['logout'] . '?' . http_build_query ( $params, '', '&' );
}
public function getAuthorizeUrl($responseType = 'code', $scope = '', $state = '', $display = 'popup') {
$params = array ('client_id' => $this->clientId,'response_type' => $responseType,'redirect_uri' => $this->redirectUri,'scope' => $scope,'state' => $state,'display' => $display
);
return self::$BD_OAUTH2_ENDPOINTS ['authorize'] . '?' . http_build_query ( $params, '', '&' );
}
public function getAccessTokenByAuthorizationCode($code)
{
$params = array(
'grant_type' => 'authorization_code',
'code' => $code,
'client_id' => $this->clientId,
'client_secret' => $this->clientSecret,
'redirect_uri' => $this->redirectUri,
);
return $this->makeAccessTokenRequest($params);
}
public function getAccessTokenByClientCredentials($scope = '')
{
$params = array(
'grant_type' => 'client_credentials',
'client_id' => $this->clientId,
'client_secret' => $this->clientSecret,
'scope' => $scope,
);
return $this->makeAccessTokenRequest($params);
}
public function getAccessTokenByDeveloperCredentials($accessKey, $secretKey)
{
$params = array(
'grant_type' => 'developer_credentials',
'client_id' => $accessKey,
'client_secret' => $secretKey,
);
return $this->makeAccessTokenRequest($params);
}
public function getAccessTokenByRefreshToken($refreshToken, $scope = '')
{
$params = array(
'grant_type' => 'refresh_token',
'refresh_token' => $refreshToken,
'client_id' => $this->clientId,
'client_secret' => $this->clientSecret,
'scope' => $scope,
);
return $this->makeAccessTokenRequest($params);
}
public function makeAccessTokenRequest($params)
{
$result = $this->request(self::$BD_OAUTH2_ENDPOINTS['token'], $params, 'POST');
if ($result) {
$result = json_decode($result, true);
if (isset($result['error_description'])) {
$this->setError($result['error'], $result['error_description']);
return false;
}
return $result;
}

return false;
}

public function getAccessFace($imgurl) {

$retoken=$this->getAccessTokenByClientCredentials();
$imgurl=urlencode($imgurl);
$params = array(
'access_token' => $retoken['access_token'],
'url' => $imgurl,
);

return $this->makeAccessFaceRequest($params);
}

public function makeAccessFaceRequest($params){
$result = $this->request(self::$BD_OAUTH2_ENDPOINTS['face'], $params, 'POST');
if ($result) {
$result = json_decode($result, true);
if (isset($result['error_description'])) {
$this->setError($result['error'], $result['error_description']);
return false;
}
return $result;
}
return false;
}


public static function setError($errno, $errmsg)
{
self::$errno = $errno;
self::$errmsg = $errmsg;
self::errorLog($errmsg);
}

/**
* Get the gloable errno.
*
* @return int
*/
public static function errno()
{
return self::$errno;
}

/**
* Get the gloable error message.
*
* @return string
*/
public static function errmsg()
{
return self::$errmsg;
}

/**
* Whether to set the debug mode of the Baidu OpenAPI SDK or not.
*
* @param bool $on true or false
* @return void
*/
public static function setDebugMode($on = true)
{
self::$isDebug = $on;
}

/**
* Whether the debug mode of the Baidu OpenAPI SDK is on or off.
*
* @return bool
*/
public static function isDebugMode()
{
return self::$isDebug;
}
/**
* Request for a http/https resource
*
* @param string $url Url to request
* @param array $params Parameters for the request
* @param string $httpMethod Http method, 'GET' or 'POST'
* @param bool $multi Whether it's a multipart POST request
* @return string|false Returns string if success, or false if failed
*/
public static function request($url, $params = array(), $httpMethod = 'GET', $multi = false)
{
// when using bae(baidu app engine) to deploy the application,
// just comment the following line
$ch = curl_init();
// when using bae(baidu app engine) to deploy the application,
// and uncomment the following two lines
//$fetch= new BaeFetchUrl();
//$ch = $fetch->getHandle();

$curl_opts = array(
CURLOPT_CONNECTTIMEOUT => 3,
CURLOPT_TIMEOUT => 5,
CURLOPT_USERAGENT => 'baidu-apiclient-php-2.0',
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HEADER => false,
CURLOPT_FOLLOWLOCATION => false,
);

if (stripos($url, 'https://') === 0) {
$curl_opts[CURLOPT_SSL_VERIFYPEER] = false;
}

if (strtoupper($httpMethod) === 'GET') {
$query = http_build_query($params, '', '&');
$delimiter = strpos($url, '?') === false ? '?' : '&';
$curl_opts[CURLOPT_URL] = $url . $delimiter . $query;
$curl_opts[CURLOPT_POST] = false;
} else {
$headers = array();
if ($multi && is_array($params) && !empty($params)) {
$body = self::buildHttpMultipartBody($params);
$headers[] = 'Content-Type: multipart/form-data; boundary=' . self::$boundary;
} else {
$body = http_build_query($params, '', '&');
}
$curl_opts[CURLOPT_URL] = $url;
$curl_opts[CURLOPT_POSTFIELDS] = $body;
$curl_opts[CURLOPT_HTTPHEADER] = $headers;
}

curl_setopt_array($ch, $curl_opts);
$result = curl_exec($ch);

if ($result === false) {
self::setError(curl_errno($ch), curl_error($ch));
curl_close($ch);
return false;
} elseif (empty($result)) {
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if ($http_code != 200) {
self::setError($http_code, 'http response status code: ' . $http_code);
curl_close($ch);
return false;
}
}

curl_close($ch);

return $result;
}

/**
* Prints to the error log if you aren't in command line mode.
*
* @param String log message
*/
public static function errorLog($msg)
{
// disable error log if we are running in a CLI environment
if (php_sapi_name() != 'cli') {
error_log($msg);
}

// Set the debug mode if you want to see the errors on the page
if (self::$isDebug) {
echo 'error_log: '.$msg."\n";
}
}

/**
* Generate the signature for passed parameters.
*
* @param array $params Array of parameters to be signatured
* @param string $secret Secret key for signature
* @param string $namespace The parameter which will be excluded when calculate the signature
* @return string Signature of the parameters
*/
public static function generateSign($params, $secret, $namespace = 'sign')
{
$str = '';
ksort($params);
foreach ($params as $k => $v) {
if ($k != $namespace) {
$str .= "$k=$v";
}
}
$str .= $secret;
return md5($str);
}

/**
* Get the url of current page.
*
* @return string
*/
public static function getCurrentUrl()
{
$protocol = 'http://';
if (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
$protocol = strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) . '://';
} elseif (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') {
$protocol = 'https://';
}

if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
$host = $_SERVER['HTTP_X_FORWARDED_HOST'];
} else {
$host = $_SERVER['HTTP_HOST'];
}

$currentUrl = $protocol . $host . $_SERVER['REQUEST_URI'];
$parts = parse_url($currentUrl);

$query = '';
if (!empty($parts['query'])) {
// drop known oauth params
$params = explode('&', $parts['query']);
$retained_params = array();
foreach ($params as $param) {
if (self::shouldRetainParam($param)) {
$retained_params[] = $param;
}
}

if (!empty($retained_params)) {
$query = '?' . implode($retained_params, '&');
}
}

// use port if non default
$port = isset($parts['port']) && (($protocol === 'http://' && $parts['port'] !== 80) ||
($protocol === 'https://' && $parts['port'] !== 443)) ? ':' . $parts['port'] : '';

// rebuild
return $protocol . $parts['host'] . $port . $parts['path'] . $query;
}

private static function shouldRetainParam($param)
{
foreach (self::$DROP_QUERY_PARAMS as $drop_query_param) {
if (strpos($param, $drop_query_param . '=') === 0) {
return false;
}
}

return true;
}

/**
* Build the multipart body for file uploaded request.
* @param array $params Parameters for the request
* @return string
*/
private static function buildHttpMultipartBody($params)
{
$body = '';
$pairs = array();
self::$boundary = $boundary = md5('BAIDU-PHP-SDK-V2' . microtime(true));

foreach ($params as $key => $value) {
if ($value{0} == '@') {
$url = ltrim($value, '@');
$content = file_get_contents($url);
$array = explode('?', basename($url));
$filename = $array[0];

$body .= '--' . $boundary . "\r\n";
$body .= 'Content-Disposition: form-data; name="' . $key . '"; filename="' . $filename . '"'. "\r\n";
$body .= 'Content-Type: ' . self::detectMimeType($url) . "\r\n\r\n";
$body .= $content . "\r\n";
} else {
$body .= '--' . $boundary . "\r\n";
$body .= 'Content-Disposition: form-data; name="' . $key . "\"\r\n\r\n";
$body .= $value . "\r\n";
}
}

$body .= '--' . $boundary . '--';
return $body;
}

/**
* Tries to detect MIME type of a file
*
* The method will try to use fileinfo extension if it is available,
* deprecated mime_content_type() function in the other case. If neither
* works, default 'application/octet-stream' MIME type is returned
*
* @param string filename
* @return string file MIME type
*/
private static function detectMimeType($filename)
{
// finfo extension from PECL available
if (function_exists('finfo_open')) {
if (!isset(self::$fileinfoDb)) {
self::$fileinfoDb = finfo_open(FILEINFO_MIME);
}
if (self::$fileinfoDb) {
$info = finfo_file(self::$fileinfoDb, $filename);
}
}
// (deprecated) mime_content_type function available
if (empty($info) && function_exists('mime_content_type')) {
$info = mime_content_type($filename);
}
return empty($info)? 'application/octet-stream': $info;
}
}第四步，在Common目录添加方法代码如下function face($url){
$clientId = '这里用API Key替换';
$clientSecret = '这里用Secret Key替换';
$image = new \Org\Util\Baidu($clientId,$clientSecret);
return $image->getAccessFace($url);
}第五步，使用函数
$url='http://xxx.xxx.com/xxx/xxx.jpg';
dump(face($url));
成功返回：
array(6) {
["face"] => array(1) {
[0] => array(3) {
["face_id"] => string(32) "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
["attribute"] => array(3) {
["gender"] => array(2) {
["confidence"] => string(8) "1.000000"
["value"] => string(6) "female"
}
["smiling"] => array(1) {
["confidence"] => string(8) "0.131746"
}
["face"] => array(2) {
["value"] => string(4) "true"
["confidence"] => string(4) "0.19"
}
}
["position"] => array(6) {
["center"] => array(2) {
["x"] => string(8) "0.653580"
["y"] => string(8) "0.285610"
}
["width"] => string(8) "0.624930"
["height"] => string(8) "0.468110"
["eye_left"] => array(2) {
["x"] => string(8) "0.541770"
["y"] => string(8) "0.115710"
}
["eye_right"] => array(2) {
["x"] => string(8) "0.875140"
["y"] => string(8) "0.186870"
}
["mouth"] => array(2) {
["x"] => string(8) "0.640980"
["y"] => string(8) "0.440060"
}
}
}
}
["img_id"] => string(32) "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
["url"] => string(35) "http://xxx.xxx.com/xxx/xxx.jpg"
["session_id"] => string(32) "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
["img_width"] => string(3) "200"
["img_height"] => string(3) "267"

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