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  • curl的使用

    1、curl介绍(需要开启curl扩展)

    curl是PHP的一个扩展,利用该扩展可以实现服务器之间的数据或文件的传输,也就是curl就是一个工具,用来做服务器之间的数据,文件传输的工具。

     2、应用场景

    可以用来采集html网页文件,其他服务器提供的接口数据等

    3、curl简单使用

    <?php
    header('content-type: text/html; charset=utf8');
    ini_set('display_errors', true);
    $curl = curl_init();                                                    //初始化,并保存句柄
    curl_setopt($curl, CURLOPT_URL, 'http://www.baidu.com');  //配置选项
    curl_exec($curl);   //执行请求
    curl_close($curl);  //关闭curl
    ?>

     进行post请求

    <?php
    header('content-type: text/html; charset=utf8');
    ini_set('display_errors', true);
    $curl = curl_init();                                                    //初始化,并保存句柄
    curl_setopt($curl, CURLOPT_POST,true);                               //进行post请求
    curl_setopt($curl, CURLOPT_POSTFIELDS, ['txt' => 'are you ok???']);    //进行post传参
    curl_setopt($curl, CURLOPT_URL, 'http://localhost/learn/test.php');    //配置选项
    curl_exec($curl);   //执行请求
    curl_close($curl);  //关闭curl
    ?>

    注意:如果发送的请求的网站是没有https安全协议的情况下,可以执行跳过安全协议较验证,可以用以下两个配置项

    <?php
    use CurlCurl;
    header('content-type: text/html; charset=utf8');
    ini_set('display_errors', true);
    require_once('./vendor/autoload.php');
    $curl = curl_init();
    //跳过验证https安全协议
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    
    curl_setopt($curl, CURLOPT_URL, 'https://www.baidu.com');
    curl_exec($curl);
    curl_close($curl);
    ?>

    4、启用curl比较成熟的扩展插件(具体可参看https://packagist.org/packages/php-curl-class/php-curl-class

    <?php
    use CurlCurl;
    header('content-type: text/html; charset=utf8');
    ini_set('display_errors', true);
    require_once('./vendor/autoload.php');
    $curl = new Curl();
    //$curl->setOpt(CURLOPT_SSL_VERIFYHOST, false);
    //$curl->setOpt(CURLOPT_SSL_VERIFYPEER, false);
    $curl->setOpts([CURLOPT_SSL_VERIFYHOST => false, CURLOPT_SSL_VERIFYPEER => false]);
    $curl->get('https://www.baidu.com');
    if($curl->error) {
        echo 'Error: ' . $curl->errorCode . ': ' . $curl->errorMessage . "
    ";
    } else {
        echo '<pre>';
        echo $curl->response;
    }
    ?>

     如果需要传递参数

    // https://www.example.com/search?q=keyword
    $curl = new Curl();
    $curl->get('https://www.example.com/search', array(
        'q' => 'keyword',
    ));

    如果需要设置请求头

    <?php
    use CurlCurl;
    header('content-type: text/html; charset=utf8');
    ini_set('display_errors', true);
    require_once('./vendor/autoload.php');
    $curl = new Curl();
    $curl->setOpts([CURLOPT_SSL_VERIFYHOST => false, CURLOPT_SSL_VERIFYPEER => false]);
    $curl->setHeader('Token','46c48bec0d282018b9d167eef7711b2c');
    $curl->get('http://*********.php');
    if($curl->error) {
        echo 'Error: ' . $curl->errorCode . ': ' . $curl->errorMessage . "
    ";
    } else {
        $arr = json_decode(json_encode($curl->response), true);
        var_dump($arr);
    }
    ?>

    其他设置

    $curl->setBasicAuthentication('username', 'password');
    $curl->setUserAgent('MyUserAgent/0.0.1 (+https://www.example.com/bot.html)');
    $curl->setReferrer('https://www.example.com/url?url=https%3A%2F%2Fwww.example.com%2F');
    $curl->setHeader('X-Requested-With', 'XMLHttpRequest');
    $curl->setCookie('key', 'value');

    post请求

    $curl = new Curl();
    $curl->post('https://www.example.com/login/', array(
        'username' => 'myusername',
        'password' => 'mypassword',
    ));

    put请求

    $curl = new Curl();
    $curl->put('https://api.example.com/user/', array(
        'first_name' => 'Zach',
        'last_name' => 'Borboa',
    ));

    delete请求

    $curl = new Curl();
    $curl->delete('https://api.example.com/user/', array(
        'id' => '1234',
    ));

    下载文件

    // Case-insensitive access to headers.
    $curl = new Curl();
    $curl->download('https://www.example.com/image.png', '/tmp/myimage.png');
    echo $curl->responseHeaders['Content-Type'] . "
    "; // image/png
    echo $curl->responseHeaders['CoNTeNT-TyPE'] . "
    "; // image/png

    句柄关闭

    // Manual clean up.
    $curl->close();

     利用curl进行上传文件

    <?php
    use CurlCurl;
    header('content-type: text/html; charset=utf8');
    ini_set('display_errors', true);
    require_once('./vendor/autoload.php');
    $curl = new Curl();
    $curl->setOpts([CURLOPT_SSL_VERIFYHOST => false, CURLOPT_SSL_VERIFYPEER => false]);
    $curl->post('http://localhost/learn/test.php', ['file' => new CURLFile('C:wamp64wwwlearnfileother.png')]); //也可以用new CURLFile(realpath('./file/other.png'))
    if($curl->error) {
      
    echo 'Error: ' . $curl->errorCode . ': ' . $curl->errorMessage . " ";
    }
    else {
      
    $arr = json_decode(json_encode($curl->response), true); var_dump(json_decode($arr, true));
    }
    ?>

    模拟接收

    <?php
    header('content-type: text/html; charset=utf8');
    class Test {
        public function __construct() {}
        public function file() {
            $file = $_FILES;
            echo json_encode($file);
        }
    }
    (new Test())->file();
    ?>
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  • 原文地址:https://www.cnblogs.com/rickyctbu/p/11481375.html
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