Php 无法获取marketo rest APi的访问令牌

我正在使用MarketoRESTAPI。在这里我正在编写这段代码

class UpsertLeads{
private $host = "";//CHANGE ME
private $clientId = "";//CHANGE ME
private $clientSecret = "";//CHANGE ME
public $input; //an array of lead records as objects
public $lookupField; //field used for deduplication
public $action; //operation type, createOnly, updateOnly, createOrUpdate, createDuplicate

public function postData(){
    $url = $this->host . "/rest/v1/leads.json?access_token=" . $this->getToken();
    $ch = curl_init($url);
    $requestBody = $this->bodyBuilder();
    print_r($requestBody);
    curl_setopt($ch,  CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('accept: application/json','Content-Type: application/json'));
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $requestBody);
    curl_getinfo($ch);
    $response = curl_exec($ch);
    return $response;
}

private function getToken(){
    $ch = curl_init($this->host . "/identity/oauth/token?grant_type=client_credentials&client_id=" . $this->clientId . "&client_secret=" . $this->clientSecret);
    curl_setopt($ch,  CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('accept: application/json',));
    $response = json_decode(curl_exec($ch));
    curl_close($ch);
    $token = $response->access_token;
    return $token;
}

当我从postData（）返回url时，它将如下打印 "" 您可以注意到我没有获得访问令牌。 当我从getToken（）打印URl时，它将被打印为正确的URl，当我在浏览器中点击此URl时，我将获得正确的输出。 谢谢。

公共函数postData（）{
$url=$this->host./rest/v1/leads.json？访问令牌=“.this->getToken（）；
$ch=curl\u init（$url）；
//$requestBody=$this->bodyBuilder（）；
//打印（请求主体）；
curl_setopt（$ch，CURLOPT_RETURNTRANSFER，1）；
curl_setopt（$ch，CURLOPT_HTTPHEADER，array（'accept:application/json'，'Content-Type:application/json'））；
卷曲设置（$ch，卷曲设置桩，1）；
//curl_setopt（$ch，CURLOPT_POSTFIELDS，$requestBody）；
curl_getinfo（$ch）；
$response=curl\u exec（$ch）；
//echo“”；print_r（$response）；exit（）；
返回$url；
}

正在返回带有有效访问令牌的完美API URL，请检查bodyBuilder（）是否正在更改某些内容

public function postData(){
    $url = $this->host . "/rest/v1/leads.json?access_token=" . $this->getToken();
    $ch = curl_init($url);
    //$requestBody = $this->bodyBuilder();
    //print_r($requestBody);
    curl_setopt($ch,  CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('accept: application/json','Content-Type: application/json'));
    curl_setopt($ch, CURLOPT_POST, 1);
    //curl_setopt($ch, CURLOPT_POSTFIELDS, $requestBody);
    curl_getinfo($ch);
    $response = curl_exec($ch);
    //echo"<pre>";print_r($response);exit();
    return $url;
}