<?php

function niuc_curl($url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
curl_setopt($ch, CURLOPT_REFERER, $_G['siteurl']);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}

$url = 'https://openapi.baidu.com/oauth/2.0/token?grant_type=authorization_code&code='.$code.'&client_id='.$apikey.'&client_secret='.$secretkey.'&redirect_uri='.$redirecturi;
if(function_exists('curl_init')) {
$result = niuc_curl($url);
echo 'niuc_curl ok...';
} else {
$result = file_get_contents($url);
echo 'file_get_contents ok...';
}
$token_arr = (array)json_decode($result);
if(!$token_arr['access_token']){
if($result == '') {
echo 'Error';
}
else
{
echo 'OK';
}
exit;
}

?>