非阻塞模式是指利用socket事件的消息机制,Server端与Client端之间的通信处于异步状态。
让PHP不再阻塞当PHP作为后端处理需要完成一些长时间处理,为了快速响应页面请求,不作结果返回判断的情况下,可以有如下措施:
一、若你使用的是FastCGI模式,使用fastcgi_finish_request()能马上结束会话,但PHP线程继续在跑。
echo "program start."; file_put_contents('log.txt','start-time:'.date('Y-m-d H:i:s'), FILE_APPEND); fastcgi_finish_request(); sleep(1); echo 'debug...'; file_put_contents('log.txt', 'start-proceed:'.date('Y-m-d H:i:s'), FILE_APPEND); sleep(10); file_put_contents('log.txt', 'end-time:'.date('Y-m-d H:i:s'), FILE_APPEND);
这个例子输出结果可看到输出program start.后会话就返回了,所以debug那个输出浏览器是接收不到的,而log.txt文件能完整接收到三个完成时间。
二、使用fsockopen、cUrl的非阻塞模式请求另外的网址
$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30); if (!$fp) die('error fsockopen'); stream_set_blocking($fp,0); $http = "GET /save.php / HTTP/1.1\r\n"; $http .= "Host: www.example.com\r\n"; $http .= "Connection: Close\r\n\r\n"; fwrite($fp,$http); fclose($fp);
利用cURL中的curl_multi_*函数发送异步请求
$cmh = curl_multi_init(); $ch1 = curl_init(); curl_setopt($ch1, CURLOPT_URL, "http://localhost:6666/child.php"); curl_multi_add_handle($cmh, $ch1); curl_multi_exec($cmh, $active); echo "End\n";
三、使用Gearman、Swoole扩展
Gearman是一个具有php扩展的分布式异步处理框架,能处理大批量异步任务;
Swoole最近很火,有很多异步方法,使用简单。(尘缘注:号称重新定义PHP,把NodeJS喷得体无完肤。Swoole工具虽好,却感觉是扩展本身跟NodeJS没可比性)
四、使用redis等缓存、队列,将数据写入缓存,使用后台计划任务实现数据异步处理。
这个方法在常见的大流量架构中应该很常见吧
五、极端的情况下,可以调用系统命令,可以将数据传给后台任务执行,个人感觉不是很高效。
$cmd = 'nohup php ./processd.php $someVar >/dev/null &'; `$cmd`
六、外国佬的大招,没看懂,php原生支持
http://nikic.github.io/2012/12/22/Cooperative-multitasking-using-coroutines-in-PHP.html
七、安装pcntl扩展,使用pcntl_fork生成子进程异步执行任务,个人觉得是最方便的,但也容易出现zombie process。
if (($pid = pcntl_fork()) == 0) { child_func(); //子进程函数,主进程运行 } else { father_func(); //主进程函数 } echo "Process " . getmypid() . " get to the end.\n"; function father_func() { echo "Father pid is " . getmypid() . "\n"; } function child_func() { sleep(6); echo "Child process exit pid is " . getmypid() . "\n"; exit(0); }
以上内容是小编给大家介绍的PHP非阻塞模式,希望对大家有所帮助!

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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