php_curl.dll扩展介绍和详解
、什么是CURL且能实现什么功能?
什么是CURL
curl是一个利用URL语法在命令行方式下工作的文件传输工具。它支持很多协议:FTP, FTPS, HTTP, HTTPS, GOPHER, TELNET, DICT, FILE 以及 LDAP。curl同样支持HTTPS认证,HTTP POST方法, HTTP PUT方法, FTP上传, HTTP上传, 代理服务器, cookies, 用户名/密码认证, 下载文件断点续传等等,功能十分强大。
PHP中常用都实现那些功能:
1、实现远程获取和采集内容
2、实现PHP 网页版的FTP上传下载
3、实现模拟登陆
4、实现接口对接(API),数据传输等
5、实现模拟Cookie等
2、PHP 如何使用CURL功能
1 整个操作过程中第一步是用cur_init()函数进行初始化
$curl = curl_init(‘www.php100.com’);
2 然后,用curl_setopt()函数进行设置选项。
3 设置后,进行执行事务 curl_exec($curl);
4 最后关闭curl_close();
3、使用PHP CURL实现传输和获取功能
$curl = curl_init(); //初始化一个 cURL 对象
curl_setopt($curl, CURLOPT_URL, "http://www.php100.com");
//设置你需要抓取的URL
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 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。
$data = curl_exec($curl); //运行cURL,请求网页
curl_close($curl); //关闭URL请求
===========
$user = "admin";
$pass = "admin100";
$curlPost = "user=$user&pass=$pass";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://localhost/edu/login.php");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);
$data = curl_exec($ch);
curl_close($ch);
1、CURL模拟登陆的流程和步骤
2、tempnam 创建一个临时文件
3、使用CURL模拟登陆到PHP100论坛
$cookie_file = tempnam('./temp','cookie');
$login_url = 'http://bbs.php100.com/login.php';
$post_fields = 'cktime=31536000&step=2&pwuser=php100-88&pwpwd=111111';
$ch = curl_init($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);
$url='http://bbs.php100.com/userpay.php';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);
$contents = curl_exec($ch);
preg_match("/
echo $arr[1];
curl_close($ch);
?>

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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