php - fatal error : Call to undefined function curl()

Question

这是我的 Twitter 应用程序的代码。我尝试纠正错误但无济于事

Fatal error: Call to undefined function curl() in C:\wamp\www\tweet\twitter.php on line 47

我必须在代码中编辑哪些内容？

<?php
require_once('TwitterAPIExchange.php');

$settings = array(
    'oauth_access_token' => "",
    'oauth_access_token_secret' => "",
    'consumer_key' => "",
    'consumer_secret' => ""
);

$url = "https://api.twitter.com/1.1/statuses/user_timeline.json";

$requestMethod = "GET";

if (isset($_GET['user']))  {$user = $_GET['user'];}  else {$user  = "iagdotme";}
if (isset($_GET['count'])) {$user = $_GET['count'];} else {$count = 20;}

$getfield = "?screen_name=$user&count=$count";
$twitter = new TwitterAPIExchange($settings);
$string = json_decode($twitter->setGetfield($getfield)
->buildOauth($url, $requestMethod)
->performRequest(),$assoc = TRUE);

if (is_array($string)) 
{
    foreach($string as $items)
    {
        echo "Time and Date of Tweet: ".$items['created_at']."<br />";
        echo "Tweet: ". $items['text']."<br />";
        echo "Tweeted by: ". $items['user']['name']."<br />";
        echo "Screen name: ". $items['user']['screen_name']."<br />";
        echo "Followers: ". $items['user']['followers_count']."<br />";
        echo "Friends: ". $items['user']['friends_count']."<br />";
        echo "Listed: ". $items['user']['listed_count']."<br /><hr />";
    }
}

$api = "http://api.twitter.com/1/users/show.xml?screen_name=";
$users = file("users.txt", FILE_IGNORE_NEW_LINES);

$i = 0;
if (is_array($users))
{
    foreach($users as $user)
    {
        $data = curl("$api$user");
        preg_match("#<description>(.*?)</description>#is", $data, $matches);
        $bio[$i]["user"] = $user;
        $bio[$i]["description"] = $matches[1];
        $i++;
    }

    function curl($url)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_close($ch);
        return curl_exec($ch);
    }

}

Answer 1

将 curl() 函数的声明移到包含该函数的 if(){} block 之外，如下所示。

if (is_array($users))
{
  foreach($users as $user)
  {
    $data = curl("$api$user");
    preg_match("#<description>(.*?)</description>#is", $data, $matches);
    $bio[$i]["user"] = $user;
    $bio[$i]["description"] = $matches[1];
    $i++;
  }
}

function curl($url)
{
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $result = curl_exec($ch);
    curl_close($ch);
    return $result;
}