simplexml_load_file 不工作“php_network_getaddresses：失败：名称或服务未知”

Question

我最近才开始收到这些警告，我不知道为什么，也不知道如何解决它。更让我困惑的是，它以前可以工作，我开始在另一个班级工作，现在我开始收到这个错误......

我使用 linux fedora 和 apache 作为网络服务器。

警告：simplexml_load_file() [function.simplexml-加载文件]： php_network_getaddresses：getaddrinfo 失败：名称或服务未知 GetImagesFlickr.php 第 17 行

警告： simplexml_load_file(http://api.flickr.com/services/rest/?method=flickr.photos.search&api_key=9eb9f5e5fb72d6d2fed06cf4e64ba9bb&media=photos&per_page=50&text=fgdc) [function.simplexml-load-file]：失败 打开流： php_network_getaddresses：getaddrinfo 失败：名称或服务未知 GetImagesFlickr.php 第 17 行

警告：simplexml_load_file() [function.simplexml-load-file]：I/O 警告：无法加载外部 实体 “http://api.flickr.com/services/rest/?method=flickr.photos.search&api_key=9eb9f5e5fb72d6d2fed06cf4e64ba9bb&media=photos&per_page=50&text=fgdc” 在 /var/www/html/yahoo/GetImagesFlickr.php 第 17 行

<?php
class GetImagesFlickr
{
    const API_KEY = "***"; // Flickr api key
    const MAX_RESULTS_RETURNED = 50; // Max results returned in search

    private $url; // Flickr webservice url

    public function __construct () 
    {
        $this->url = "http://api.flickr.com/services/rest/?method=flickr.photos.search&api_key=".self::API_KEY."&media=photos&per_page=".self::MAX_RESULTS_RETURNED;
    }

    public function getImages ($search_term)
    {
        // Perform search and store xml data
        $xml_data = simplexml_load_file("{$this->url}&text={$search_term}");

        $search_results = array();

        // Go through xml data and store to array
        foreach ($xml_data->photos->photo as $current_photo)
        {
            $id = $current_photo['id'];
                        $title = $current_photo['title'];
            $farm = $current_photo['farm'];
            $secret = $current_photo['secret'];
            $server = $current_photo['server'];
            $url = "http://farm{$farm}.static.flickr.com/{$server}/{$id}_{$secret}.jpg";

            $complete_photo = array (
                'id'     => $id,
                                'title'  => $title,
                'farm'   => $farm,
                'secret' => $secret,
                'server' => $server,
                'url'    => $url
            );

            $search_results[] = $complete_photo;
        }

        return $search_results;
    }
}
?>

Answer 1

您有网络/DNS 问题，而不是 PHP 问题。看来你的机器无法解析api.flickr.com的IP。

“su”到您的网络服务器用户并尝试在那里解析名称，即

$ sudo bash
  # get root
$ su - apache
  # we're the apache user now
$ ping api.flickr.com