如何從API獲取數據 - php - curl

Question

如何從api url獲取數據（圖片）？

阿比結果：

info = { "title" : "aaaaa", "image" : "bbbbb" }; 

API網址：

http://www.example.com/api 

代碼：

<?php 
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
curl_setopt($ch, CURLOPT_URL, 'http://www.example.com/api'); 
$result = curl_exec($ch); 
curl_close($ch); 
$obj = json_decode($result); 
echo $result->image; 
?> 

Array 
(
    [curlResult] => info = { "title" : "aaaaa", "image" : "bbbbb" }; 
    [info] => Array 
     (
      [url] => http://127.0.0.1/api.txt 
      [content_type] => text/plain 
      [http_code] => 200 
      [header_size] => 237 
      [request_size] => 55 
      [filetime] => -1 
      [ssl_verify_result] => 0 
      [redirect_count] => 0 
      [total_time] => 0 
      [namelookup_time] => 0 
      [connect_time] => 0 
      [pretransfer_time] => 0 
      [size_upload] => 0 
      [size_download] => 48 
      [speed_download] => 48 
      [speed_upload] => 0 
      [download_content_length] => 48 
      [upload_content_length] => 0 
      [starttransfer_time] => 0 
      [redirect_time] => 0 
      [certinfo] => Array 
       (
       ) 

      [primary_ip] => 127.0.0.1 
      [primary_port] => 80 
      [local_ip] => 127.0.0.1 
      [local_port] => 61662 
      [redirect_url] => 
     ) 

    [errno] => 0 
    [error] => 
) 

Answer 1

的一個好辦法，試圖調試這將是檢查捲曲信息陣列，或捲曲的錯誤。

<?php 
/** 
* Handles making a cURL request 
* 
* @param string $url   URL to call out to for information. 
* @param bool $callDetails Optional condition to allow for extended  
* information return including error and getinfo details. 
* 
* @return array $returnGroup cURL response and optional details. 
*/ 
function makeRequest($url, $callDetails = false) 
{ 
    // Set handle 
    $ch = curl_init($url); 

    // Set options 
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 

    // Execute curl handle add results to data return array. 
    $result = curl_exec($ch); 
    $returnGroup = ['curlResult' => $result,]; 

    // If details of curl execution are asked for add them to return group. 
    if ($callDetails) { 
    $returnGroup['info'] = curl_getinfo($ch); 
    $returnGroup['errno'] = curl_errno($ch); 
    $returnGroup['error'] = curl_error($ch); 
    } 

    // Close cURL and return response. 
    curl_close($ch); 
    return $returnGroup; 
} 

$url = /* some url */ 
$response = makeRequest($url, true); 

// Check your return to make sure you are making a successful connection. 
echo '<pre>'; 
print_r($response); 
?> 

看到，如果你成功地進行連接，然後你也越來越早在響應究竟應該給你如何處理解析它一個更好的主意。

編輯

它看起來像有是防止工作json_decode功能一些非JSON字符串數據。這並不理想，但它發生了。以下方法應該有助於解決這個特定情況，但這只是解決涉及錯誤數據的問題的解決方法。

// continuing from above :) formatted for readability 

/** 
* Separates JSON string from unnecessary data, parses into 
* an object and returns. 
* 
* @param string $curlResult String returned from cURL call. 
* 
* @return object $jsonObject Parsed JSON object. 
*/ 
function cleanJsonString($curlResult) { 
    // Separates result string into array at " = ". 
    $responseChunks = explode(" = ", $curlResult); 

    // Removes semicolon from end of JSON string. 
    $jsonString = substr($responseChunks[1], -1); 

    // Parse JSON string into object. 
    $jsonObject = json_decode($jsonString); 

    return $jsonObject; 
} 

// Clean result. 
$jsonObject = cleanJsonString($response['curlResult']); 

// Print image object property. 
echo $jsonObject->image; 

Answer 2

根據影像是否有實際的BLOB內容或網址鏈接可能會改變您顯示圖像的方式。

如果是內容，您需要獲取MIME類型才能正確顯示，以便您可以設置正確的頁眉。

如果有鏈接，請訪問該網頁。

Answer 3

在您的API：

1. 閱讀整個圖像內容的字符串。 （file_get_contents）
2. 將其編碼爲base64字符串。 （base64_encode）
3. 將其添加到返回結果中。 （替換 「圖像」= 「BBBBB」）

這看起來：

$result = array(
    "title" => "aaaaa", 
    "image" => "bbbbb" 
); 
$result["image"] = file_get_contents("path/to/your/image/file"); 
$result["image"] = base64_encode($result["image"]); 
$result = json_encode($result); 
header("Content-Type: application/json"); 
echo $result; 

並在代碼：

$ch = curl_init(); 
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
curl_setopt($ch, CURLOPT_URL, 'http://www.example.com/api'); 
$result = curl_exec($ch); 
curl_close($ch); 
$obj = json_decode($result); 
// Do it if you encoded image string 
$image_string = base64_decode($obj->image); 
// Create image from base 64 decoded string 
$image = imagecreatefromstring($image_string); 
// And save your image as desired type (png or jpeg) 
imagepng($image, "path/to/save/your/image/as/png"); 

編輯：你可以提供服務器端代碼。你有預期的代碼在哪裏工作？

Answer 4

使用DOMDocument獲得圖像URL

$ch = curl_init(); 
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
    curl_setopt($ch, CURLOPT_URL, 'http://www.halalfoodrecipe.com/recipe/index'); 
    $result = curl_exec($ch); 
    curl_close($ch); 
    $obj = json_decode($result); 

    $dom = new DOMDocument; 
    $dom->loadHTML($result); 

    foreach ($dom->getElementsByTagName('img') as $img) { 
     echo $img->getAttribute('src'); 
    }