为 foreach() 提供的参数无效 - Bing 搜索 API

Question

这是 php 代码：

<?php

$acctKey = 'key';

$rootUri = 'https://api.datamarket.azure.com/Bing/Search';

$contents = file_get_contents('bing_basic.html');

if ($_POST['query'])
{

$query = urlencode("'{$_POST['query']}'");

$serviceOp = $_POST['service_op'];

$requestUri = "$rootUri/$serviceOp?$format=json&Query=$query";

$auth = base64_encode("$acctKey:$acctKey");

$data = array('http' => array('request_fulluri' => true,'ignore_errors' => true,'header' => "Authorization: Basic $auth"));

$context = stream_context_create($data);

$response = file_get_contents($requestUri, 0, $context);

$jsonObj = json_decode($response);
$resultStr = '';
foreach($jsonObj->d->results as $value)
{
    switch ($value->__metadata->type)
    {
        case 'WebResult':
        $resultStr .= "<a href=\"{$value->Url}\">{$value->Title}</a><p>{$value->Description}</p>";
        break;
        case 'ImageResult': $resultStr .= "<h4>{$value->Title} ({$value->Width}x{$value->Height}) " . "{$value->FileSize} bytes)</h4>" . "<a href=\"{$value->MediaUrl}\">" . "<img src=\"{$value->Thumbnail->MediaUrl}\"></a><br />";
        break;
    }
}

$contents = str_replace('{RESULTS}', $resultStr, $contents);

}

echo $contents;

?>

这是 html:

<html>
<head>
<title>Bing Search Tester (Basic)</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body>
<h1>Bing Search Tester (Basic)</h1>
<form method="POST" action="bing_basic.php">
<label for="service_op">Service Operation</label><br/>
<input name="service_op" type="radio" value="Web" CHECKED /> Web
<input name="service_op" type="radio" value="Image" /> Image <br/>
<label for="query">Query</label><br/>
<input name="query" type="text" size="60" maxlength="60" value="" /><br /><br />
<input name="bt_search" type="submit" value="Search" />
</form> <h2>Results</h2>
{RESULTS} 
</body>
</html>

为什么我总是收到那个错误？顺便说一句，这是重复的，但其他问题没有所有代码，也没有我的问题的答案。

此外，我对 php 对象和 json..

不是很熟悉

Api 文档：https://onedrive.live.com/view.aspx?resid=9C9479871FBFA822!112&app=Word&authkey=!ANNnJQREB0kDC04

Answer 1

仔细检查以确保 $jsonObj->d->results 确实是一个数组或者它不为空。

if( ( is_array( $jsonObj->d->results ) && ( ! empty( $jsonObj->d->results ) ) {
    foreach($jsonObj->d->results as $value)
    {
        switch ($value->__metadata->type)
        {
            case 'WebResult':
            $resultStr .= "<a href=\"{$value->Url}\">{$value->Title}</a><p>{$value->Description}</p>";
            break;
            case 'ImageResult': $resultStr .= "<h4>{$value->Title} ({$value->Width}x{$value->Height}) " . "{$value->FileSize} bytes)</h4>" . "<a href=\"{$value->MediaUrl}\">" . "<img src=\"{$value->Thumbnail->MediaUrl}\"></a><br />";
            break;
        }
    }
} else {
    if( ! is_array( $jsonObj->d->results ) {
        echo "jsonObj->d->results is not an array!";
    } elseif( empty( $jsonObj->d->results ) {
        echo "jsonObj->d->results is empty!";
    }
}

为 foreach() 提供的参数无效 - Bing 搜索 API

Invalid argument supplied for foreach() - Bing Search API

php

api

search

bing