PHP curl請求API

Question

我有一個使用JavaScript呼叫API的函數，並且運作得很好：

var headers = {
  Authorization: "Bearer " MY_ACCESS_TOKEN
};

var requestParams = {
  method: "POST",
  contentType: "application/json",
  headers: headers,
  payload: JSON.stringify({
    query: 'query {adSet(id: "' MY_ADSET_ID '") {insights(timeRange: {from: "2023-08-01T00:00:00Z", until: "2023-08-10T23:59:00Z", until: "2023-08-10T23:59:59Z"timeIncrement : DAILY) {timestamps reports {impressions conversions offerwallImpressions offerwallAverageRank spend}}}}'
  })

var response = UrlFetchApp.fetch(MY_API_ENDPOINT, requestParams);
var data = JSON.parse(response);

當我嘗試將其轉換為PHP時，我只從API中得到一個空白的回應。我做錯了什麼？

請注意，當我使用my_curl()從API檢索$MY_ACCESS_TOKEN時，它的工作正常。

$postdata = json_encode('query: query {adSet(id: "' . $MY_ADSET_ID . '") {insights(timeRange: {from: "2023 -08-01T00:00:00Z", until: "2023-08-10T23:59:59Z"} timeIncrement: DAILY) {timestamps reports {impressions conversions offerwallImpressions offerwallAverageRank spend}}');
$endpoint = $MY_API_ENDPOINT;
$headers = array (
    "Content-Type: application/json",
    "Authorization: Bearer " . $MY_ACCESS_TOKEN,
    $postdata
);

$data = my_curl ($endpoint, $headers);
var_dump ($data);

function my_curl ($endpoint, $headers) {
    $ch = curl_init ();

    curl_setopt ($ch, CURLOPT_URL, $endpoint);
    curl_setopt ($ch, CURLOPT_POST, 1);
    curl_setopt ($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt ($ch, CURLOPT_HEADER, false);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, true);

    $server_output = curl_exec($ch);
    curl_close ($ch);

    $json = json_decode ($server_output, true);

    return ($json);
}

Answer 1

當使用json_encode時，應該提供一個關聯數組或一個要編碼為JSON的對象，而不是一個字串。在你的情況下，你提供了一個字串，你在$headers陣列中混合了頭部和post資料。我已經添加了缺少的CURLOPT_POSTFIELDS選項，以便在cURL請求中包含JSON編碼的post數據，使API能夠正確接收查詢。

<?php
$MY_ACCESS_TOKEN = "your_access_token";
$MY_ADSET_ID = "your_adset_id";
$MY_API_ENDPOINT = "your_api_endpoint";

$postdata = json_encode([
    'query' => 'query {adSet(id: "' . $MY_ADSET_ID . '") {insights(timeRange: {from: "2023-08-01T00:00:00Z", until: "2023-08-10T23:59:59Z"} timeIncrement: DAILY) {timestamps reports {impressions conversions offerwallImpressions offerwallAverageRank spend}}}}'
]);

$endpoint = $MY_API_ENDPOINT;
$headers = array(
    "Content-Type: application/json",
    "Authorization: Bearer " . $MY_ACCESS_TOKEN
);

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $endpoint);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$server_output = curl_exec($ch);
curl_close($ch);

$json = json_decode($server_output, true);

var_dump($json);
?>