cURL library in PHP

<?php
$content = file_get_contents("https://segmentfault.com");
var_dump($content);

// 1. 初始化 cURL 会话
$ch = curl_init();

// 2. 设置请求选项
curl_setopt($ch, CURLOPT_URL, "https://segmentfault.com");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); # 获取的信息以字符串返回，而不是直接输出
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); # 禁止 cURL 验证对等证书，从而支持 HTTPS 访问

// 3. 执行 cURL 会话
$response = curl_exec($ch);
var_dump($response);

// 4. 关闭 cURL 会话
curl_close($ch);

<?php

// 1. 初始化 cURL 会话
$ch = curl_init();

// 2. 设置请求选项
curl_setopt($ch, CURLOPT_URL, "https://segmentfault.com/test.php"); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); # 获取的信息以字符串返回，而不是直接输出
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); # 禁止 cURL 验证对等证书，从而支持 HTTPS 访问

// 3. 执行 cURL 会话
$response = curl_exec($ch);

if ($response  === FALSE) {
    echo "cURL connert error: " . curl_error($ch);
    exit;
}

$info = curl_getinfo($ch);
if ($info[&#39;http_code&#39;] == 404) {
    echo &#39;HTTP 404&#39;;
    exit;
}

var_dump($response);

// 4. 关闭 cURL 会话
curl_close($ch);

<?php
function curl_post($url, $data) {
    $ch = curl_init(); 

    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => 1, # 获取的信息以字符串返回
        CURLOPT_POST => 1,           # 发送 POST 请求
        CURLOPT_POSTFIELDS => $data, # POST 请求数据 
    ]);

    $response = curl_exec($ch);
    
    curl_close($ch);
    
    return $response;
}

$url  = &#39;http://localhost/test.php&#39;;
$data = [&#39;id&#39; => 1, &#39;username&#39; => &#39;jochen&#39;];
echo curl_post($url, $data);

<?php
function curl_upload($url, $data) {
    $ch = curl_init(); 

    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => 1, # 获取的信息以字符串返回
        CURLOPT_POST => 1,           # 发送 POST 请求
        CURLOPT_POSTFIELDS => $data, # POST 请求数据 
    ]);

    $response = curl_exec($ch);
    
    curl_close($ch);
    
    return $response;
}

$url  = &#39;http://localhost/test.php&#39;;
$data = [&#39;id&#39; => 1, &#39;file&#39; => &#39;@/root/image/boy.jpg&#39;];
echo curl_post($url, $data);

<?php
function curl_download($url, $path) {
    $ch = curl_init(); 

    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => 1, # 获取的信息以字符串返回
    ]);

    $response = curl_exec($ch);
    
    curl_close($ch);
    
    return file_put_contents($path, $response);
}

curl_download(&#39;http://localhost/boy.jpg&#39;, &#39;./boy.jpg&#39;);

<?php
function curl_auth($url, $user, $passwd) {
    $ch = curl_init();
    
    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_USERPWD => "$user:$passwd", # 格式为："[username]:[password]"
        CURLOPT_RETURNTRANSFER => 1
    ]);
    
    $result = curl_exec($ch);
    
    curl_close($ch);
    
    return $result;
}

echo curl_auth(&#39;http://localhost&#39;, &#39;jochen&#39;, &#39;password&#39;);

<?php
// 模拟登录获取 Cookie
function curl_login($url, $data, $cookie) {
    $ch = curl_init(); 

    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_POST => 1,           # 发送 POST 请求
        CURLOPT_POSTFIELDS => $data, # POST 请求数据 
        CURLOPT_COOKIEJAR => $cookie # 将 cookie 信息保存至文件中
        CURLOPT_RETURNTRANSFER => 1, # 获取的信息以字符串返回
    ]);

    $response = curl_exec($ch);
    
    curl_close($ch);
    
    return $response;
}

// 获取页面数据
function curl_content($url, $cookie) {
    $ch = curl_init(); 
    
    curl_setopt_array($ch, [
        CURLOPT_URL => $url,
        CURLOPT_COOKIEFILE => $cookie # 加载包含 Cookie 数据的文件
        CURLOPT_RETURNTRANSFER => 1, # 获取的信息以字符串返回
    ]);

    $response = curl_exec($ch);
    
    curl_close($ch);
    
    return $response;
}

$post = [&#39;username&#39; => &#39;jochen&#39;, &#39;password&#39; => &#39;123456&#39;];
$cookie = &#39;./cookie.txt&#39;;
if (curl_login(&#39;http://localhost/login&#39;, $post,  $cookie)) {
    echo curl_content(&#39;http://localhost&#39;, $cookie);
}

<?php
require __DIR__ . &#39;/vendor/autoload.php&#39;;

use \Curl\Curl;

$curl = new Curl();
$curl->get(&#39;https://www.example.com/&#39;);

if ($curl->error) {
    echo &#39;Error: &#39; . $curl->errorCode . &#39;: &#39; . $curl->errorMessage . "\n";
} else {
    echo &#39;Response:&#39; . "\n";
    var_dump($curl->response);
}