PHP的cURL库简介及使用示例,phpcurl库示例
PHP的cURL库简介及使用示例,phpcurl库示例
使用PHP的cURL库可以简单和有效地去抓网页。你只需要运行一个脚本,然后分析一下你所抓取的网页,然后就可以以程序的方式得到你想要的数据了。无论是你想从从一个链接上取部分数据,或是取一个XML文件并把其导入数据库,那怕就是简单的获取网页内容,cURL 是一个功能强大的PHP库。
PHP中的CURL函数库(Client URL Library Function)
复制代码 代码如下:
curl_close — 关闭一个curl会话
curl_copy_handle — 拷贝一个curl连接资源的所有内容和参数
curl_errno — 返回一个包含当前会话错误信息的数字编号
curl_error — 返回一个包含当前会话错误信息的字符串
curl_exec — 执行一个curl会话
curl_getinfo — 获取一个curl连接资源句柄的信息
curl_init — 初始化一个curl会话
curl_multi_add_handle — 向curl批处理会话中添加单独的curl句柄资源
curl_multi_close — 关闭一个批处理句柄资源
curl_multi_exec — 解析一个curl批处理句柄
curl_multi_getcontent — 返回获取的输出的文本流
curl_multi_info_read — 获取当前解析的curl的相关传输信息
curl_multi_init — 初始化一个curl批处理句柄资源
curl_multi_remove_handle — 移除curl批处理句柄资源中的某个句柄资源
curl_multi_select — Get all the sockets associated with the cURL extension, which can then be "selected"
curl_setopt_array — 以数组的形式为一个curl设置会话参数
curl_setopt — 为一个curl设置会话参数
curl_version — 获取curl相关的版本信息
curl_init()函数的作用初始化一个curl会话,curl_init()函数唯一的一个参数是可选的,表示一个url地址。
curl_exec()函数的作用是执行一个curl会话,唯一的参数是curl_init()函数返回的句柄。
curl_close()函数的作用是关闭一个curl会话,唯一的参数是curl_init()函数返回的句柄。
例子一: 基本例子
复制代码 代码如下:
﹤?php
// 初始化一个 cURL 对象
$curl = curl_init();
// 设置你需要抓取的URL
curl_setopt($curl, CURLOPT_URL, 'http://www.cmx8.cn');
// 设置header
curl_setopt($curl, CURLOPT_HEADER, 1);
// 设置cURL 参数,要求结果保存到字符串中还是输出到屏幕上。
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
// 运行cURL,请求网页
$data = curl_exec($curl);
// 关闭URL请求
curl_close($curl);
// 显示获得的数据
var_dump($data);
?>
例子二: POST数据
sendSMS.php,其可以接受两个表单域,一个是电话号码,一个是短信内容。
复制代码 代码如下:
﹤?php
$phoneNumber = '13812345678';
$message = 'This message was generated by curl and php';
$curlPost = 'pNUMBER=' . urlencode($phoneNumber) . '&MESSAGE=' . urlencode($message) . '&SUBMIT=Send';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://www.lxvoip.com/sendSMS.php');
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
$data = curl_exec();
curl_close($ch);
?﹥
例子三:使用代理服务器
复制代码 代码如下:
﹤?php
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://www.cmx8.cn');
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
curl_setopt($ch, CURLOPT_PROXY, 'proxy.lxvoip.com:1080');
curl_setopt($ch, CURLOPT_PROXYUSERPWD, 'user:password');
$data = curl_exec();
curl_close($ch);
?﹥
例子四: 模拟登录
Curl 模拟登录 discuz 程序,适合DZ7.0,将username改成你的用户名,userpass改成你的密码就可以了.
复制代码 代码如下:
/**
* Curl 模拟登录 discuz 程序
* 尚未实现开启验证码的的论坛登录功能
*/
!extension_loaded('curl') && die('The curl extension is not loaded.');
$discuz_url = 'http://www.lxvoip.com';//论坛地址
$login_url = $discuz_url .'/logging.php?action=login';//登录页地址
$get_url = $discuz_url .'/my.php?item=threads'; //我的帖子
$post_fields = array();
//以下两项不需要修改
$post_fields['loginfield'] = 'username';
$post_fields['loginsubmit'] = 'true';
//用户名和密码,必须填写
$post_fields['username'] = 'lxvoip';
$post_fields['password'] = '88888888';
//安全提问
$post_fields['questionid'] = 0;
$post_fields['answer'] = '';
//@todo验证码
$post_fields['seccodeverify'] = '';
//获取表单FORMHASH
$ch = curl_init($login_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$contents = curl_exec($ch);
curl_close($ch);
preg_match('//i', $contents, $matches);
if(!empty($matches)) {
$formhash = $matches[1];
} else {
die('Not found the forumhash.');
}
//POST数据,获取COOKIE
$cookie_file = dirname(__FILE__) . '/cookie.txt';
//$cookie_file = tempnam('/tmp');
$ch = curl_init($login_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_exec($ch);
curl_close($ch);
//带着上面得到的COOKIE获取需要登录后才能查看的页面内容
$ch = curl_init($get_url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
$contents = curl_exec($ch);
curl_close($ch);
var_dump($contents);
?>
以上就是本文的全部内容了,希望大家能够喜欢。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
