正在分析维基百科URL-无法打开流:HTTP请求失败

我正在处理一个简单的PHP页面,它执行以下操作:

1. 从url querystring获取搜索字符串(例如,警官)
2. 将搜索字符串附加到维基百科搜索URL(` https://en.wikipedia.org/w/index.php?search=police+officer ')
3. 使用curl获取该搜索字符串的最终重定向URL
4. 检查重定向的URL是否包含 index.php?search -如果有,什么都不做
5. 否则,分解重定向的URL并从该URL获取最后一个值( Police_officer )
6. 将该值附加到wikipedia url,该url返回wiki记录的JSON数据( https://en.wikipedia.org/api/rest_v1/page/summary/Police_officer )
7. 使用 file_get_contents() 读取JSON数据并返回数据-例如 title

出于某种原因,在这行代码上:

$json = file_get_contents($url_json);

其中$url_json

https://en.wikipedia.org/api/rest_v1/page/summary/Santa_claus

我得到这个错误:

Warning: file_get_contents(https://en.wikipedia.org/api/rest_v1/page/summary/Santa_claus): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found in C:\xampp\public_html\test.php on line 49

但我可以在浏览器中转到该URL,并查看与此URL相同的数据类型:

https://en.wikipedia.org/api/rest_v1/page/summary/Police_officer

对于那个, file_get_contents 返回数据。

我用了这个代码:

function get_http_response_code($url) {
    $headers = get_headers($url);
    return substr($headers[0], 9, 3);
}

确认两页的响应代码均为200。

这是我的基本测试代码:

$var = $_GET['var'];
$var = str_replace(" ", "+", $var);

$url1 = "https://en.wikipedia.org/w/index.php?search=$var";

echo "<hr /> url1: $url1 <hr />";

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url1);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$a = curl_exec($ch);
$redirected_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);

echo "<hr /> url2: $redirected_url <hr />";

$url_search = strpos($redirected_url, "index.php?search");

echo "<hr /> url_search: $url_search <hr />";

function get_http_response_code($url) {
    $headers = get_headers($url);
    return substr($headers[0], 9, 3);
}

$url_response = get_http_response_code($redirected_url);

echo "<hr /> url_response: $url_response <hr />";

if ($url_search > 0) {

    // do nothing

} else {

    $tmp = explode('/', $redirected_url);
    $end = end($tmp);

    $url_json = "https://en.wikipedia.org/api/rest_v1/page/summary/$end";

    echo "<hr /> url_json: $url_json <hr />";

    $json = file_get_contents($url_json);

    if ($json) {

        $data = json_decode($json, TRUE);

        if ($data) {
            $wiki_page = $data['content_urls']['desktop']['page'];
            echo "<hr /> wiki_page: $wiki_page <hr />";
        }

    }

}

我错过了什么?