在 Twitter / CodeIgniter 项目中安装 cURL

Posted 2023-02-25

【中文标题】在 Twitter / CodeIgniter 项目中安装 cURL

【英文标题】：Installing cURL in a Twitter / CodeIgniter project

【发布时间】：2013-04-30 12:16:05

【问题描述】：

我是 Twitter API 1.1 版的新手，在运行 http://localhost/twitter_test.php 时遇到此错误时正在关注 Jimbo's excellent answer to this question：

需要安装cURL，见：http://curl.haxx.se/docs/install.html

虽然我的 XP 机器上已经安装了 cURL，但如何在这个测试 codeigniter 项目中“安装 cURL”？

twitter_test.php

// Set access tokens here
$settings = array(
    'oauth_access_token' => "My Access Token",
    'oauth_access_token_secret' => "My Access Secret",
    'consumer_key' => "My Consumer Key",
    'consumer_secret' => "My Consumer Secret"   
    );  

$url = 'https://api.twitter.com/1.1/followers/ids.json';
$getfield = '?username=somename';
$requestMethod = 'GET';
$twitter = new TwitterAPIExchange($settings);
echo $twitter->setGetfield($getfield)
             ->buildOauth($url, $requestMethod)
             ->performRequest();
?>

TwitterAPIExchange.php（来源：j7mbo / twitter-api-php）

<?php

/**
 * Twitter-API-PHP : Simple PHP wrapper for the v1.1 API
 * 
 * PHP version 5.3.10
 * 
 * @category Awesomeness
 * @package  Twitter-API-PHP
 * @author   James Mallison <[e-mail]>
 * @license  http://opensource.org/licenses/gpl-license.php GNU Public License
 * @link     http://github.com/j7mbo/twitter-api-php
 */
class TwitterAPIExchange 

    private $oauth_access_token;
    private $oauth_access_token_secret;
    private $consumer_key;
    private $consumer_secret;
    private $postfields;
    private $getfield;
    protected $oauth;
    public $url;

    /**
     * Create the API access object. Requires an array of settings::
     * oauth access token, oauth access token secret, consumer key, consumer secret
     * These are all available by creating your own application on dev.twitter.com
     * Requires the cURL library
     * 
     * @param array $settings
     */
    public function __construct(array $settings)
    
        if (!in_array('curl', get_loaded_extensions())) 
        
            exit('You need to install cURL, see: http://curl.haxx.se/docs/install.html');
        

        if (!isset($settings['oauth_access_token'])
            || !isset($settings['oauth_access_token_secret'])
            || !isset($settings['consumer_key'])
            || !isset($settings['consumer_secret']))
        
            exit('Make sure you are passing in the correct parameters');
        

        $this->oauth_access_token = $settings['oauth_access_token'];
        $this->oauth_access_token_secret = $settings['oauth_access_token_secret'];
        $this->consumer_key = $settings['consumer_key'];
        $this->consumer_secret = $settings['consumer_secret'];
    

    /**
     * Set postfields array, example: array('screen_name' => 'J7mbo')
     * 
     * @param array $array Array of parameters to send to API
     * @return \TwitterAPIExchange Instance of self for method chaining
     */
    public function setPostfields(array $array)
    
        if (!is_null($this->getGetfield())) 
         
            exit('You can only choose get OR post fields.'); 
        
        $this->postfields = $array;
        return $this;
    

    /**
     * Set getfield string, example: '?screen_name=J7mbo'
     * 
     * @param string $string Get key and value pairs as string
     * @return \TwitterAPIExchange Instance of self for method chaining
     */
    public function setGetfield($string)
    
        if (!is_null($this->getPostfields())) 
         
            exit('You can only choose get OR post fields.'); 
        

        $this->getfield = $string;
        return $this;
    

    /**
     * Get getfield string (simple getter)
     * 
     * @return string $this->getfields
     */
    public function getGetfield()
    
        return $this->getfield;
    

    /**
     * Get postfields array (simple getter)
     * 
     * @return array $this->postfields
     */
    public function getPostfields()
    
        return $this->postfields;
    

    /**
     * Build the Oauth object using params set in construct and additionals
     * passed to this method. For v1.1, see: https://dev.twitter.com/docs/api/1.1
     * 
     * @param string $url The API url to use. Example: https://api.twitter.com/1.1/search/tweets.json
     * @param string $requestMethod Either POST or GET
     * @return \TwitterAPIExchange Instance of self for method chaining
     */
    public function buildOauth($url, $requestMethod)
    
        if (strtolower($requestMethod) !== 'post' && strtolower($requestMethod) !== 'get')
        
            exit('Request method must be either POST or GET');
        

        $consumer_key = $this->consumer_key;
        $consumer_secret = $this->consumer_secret;
        $oauth_access_token = $this->oauth_access_token;
        $oauth_access_token_secret = $this->oauth_access_token_secret;

        $oauth = array( 
            'oauth_consumer_key' => $consumer_key,
            'oauth_nonce' => time(),
            'oauth_signature_method' => 'HMAC-SHA1',
            'oauth_token' => $oauth_access_token,
            'oauth_timestamp' => time(),
            'oauth_version' => '1.0'
        );

        $getfield = $this->getGetfield();

        if (!is_null($getfield))
        
            $getfields = str_replace('?', '', explode('&', $getfield));
            foreach ($getfields as $g)
            
                $split = explode('=', $g);
                $oauth[$split[0]] = $split[1];
            
        

        $base_info = $this->buildBaseString($url, $requestMethod, $oauth);
        $composite_key = rawurlencode($consumer_secret) . '&' . rawurlencode($oauth_access_token_secret);
        $oauth_signature = base64_encode(hash_hmac('sha1', $base_info, $composite_key, true));
        $oauth['oauth_signature'] = $oauth_signature;

        $this->url = $url;
        $this->oauth = $oauth;

        return $this;
    

    /**
     * Perform the acual data retrieval from the API
     * 
     * @param boolean optional $return If true, returns data. 
     * @return json If $return param is true, returns json data.
     */
    public function performRequest($return = true)
    
        if (!is_bool($return)) 
         
            exit('performRequest parameter must be true or false'); 
        

        $header = array($this->buildAuthorizationHeader($this->oauth), 'Expect:');

        $getfield = $this->getGetfield();
        $postfields = $this->getPostfields();

        $options = array( 
            CURLOPT_HTTPHEADER => $header,
            CURLOPT_HEADER => false,
            CURLOPT_URL => $this->url,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_SSL_VERIFYPEER => false
        );

        if (!is_null($postfields))
        
            $options[CURLOPT_POSTFIELDS] = $postfields;
        
        else
        
            if ($getfield !== '')
            
                $options[CURLOPT_URL] .= $getfield;
            
        

        $feed = curl_init();
        curl_setopt_array($feed, $options);
        $json = curl_exec($feed);
        curl_close($feed);

        if ($return)  return $json; 
    

    /**
     * Private method to generate the base string used by cURL
     * 
     * @param string $baseURI
     * @param string $method
     * @param string $params
     * @return string Built base string
     */
    private function buildBaseString($baseURI, $method, $params) 
    
        $return = array();
        ksort($params);

        foreach($params as $key=>$value)
        
            $return[] = "$key=" . $value;
        

        return $method . "&" . rawurlencode($baseURI) . '&' . rawurlencode(implode('&', $return)); 
    

    /**
     * Private method to generate authorization header used by cURL
     * 
     * @param array $oauth Array of oauth data generated by buildOauth()
     * @return string $return Header used by cURL for request
     */    
    private function buildAuthorizationHeader($oauth) 
    
        $return = 'Authorization: OAuth ';
        $values = array();

        foreach($oauth as $key => $value)
        
            $values[] = "$key=\"" . rawurlencode($value) . "\"";
        
        $return .= implode(', ', $values);
        return $return;
    

【问题讨论】：

当你用 你在 cURL 的块中看到了什么？

+1 cURL 没有块

因此，它已“安装”，但对 PHP 不可用（PHP 未配置为使用它...可能未使用 curl 扩展名编译）。见这里：php.net/manual/en/curl.installation.php

很高兴我把代码放在那里检查人们现在有 cURL！ ;)

+1 @Jimbo 非常感谢 TwitterAPIExchange.php 太棒了！

【参考方案1】：

How to enable curl in xampp?

假设您使用的是 XAMPP。

无论如何，您可能只需要找到php.ini，打开它，取消注释;extension=php_curl.dll（删除分号）并重新启动apache。