Asynchronous execution of scripts in PHP language_PHP tutorial
PHP language implements asynchronous execution of scripts
In PHP language, you need to use the fsockopen() function to run the script asynchronously. The code is as follows//Asynchronous request function (if the debug parameter is true, it is used for debugging. If you enable debugging, you can see the asynchronous execution, but the asynchronous effect will be lost)
main.php
<!--?php function request_by_fsockopen($url,$post_data=array(),$debug=false){ $url_array = parse_url($url); $hostname = $url_array['host']; $port = isset($url_array['port'])? $url_array['port'] : 80; @$requestPath = $url_array['path'] ."?". $url_array['query']; $fp = fsockopen($hostname, $port, $errno, $errstr, 10); if (!$fp) { echo "$errstr ($errno)"; return false; } $method = "GET"; if(!empty($post_data)){ $method = "POST"; } $header = "$method $requestPath HTTP/1.1\r\n"; $header.="Host: $hostname\r\n"; if(!empty($post_data)){ $_post = strval(NULL); foreach($post_data as $k =--> $v){ $_post[]= $k."=".urlencode($v);//必须做url转码以防模拟post提交的数据中有&符而导致post参数键值对紊乱 } $_post = implode('&', $_post); $header .= "Content-Type: application/x-www-form-urlencoded\r\n";//POST数据 $header .= "Content-Length: ". strlen($_post) ."\r\n";//POST数据的长度 $header.="Connection: Close\r\n\r\n";//长连接关闭 $header .= $_post; //传递POST数据 }else{ $header.="Connection: Close\r\n\r\n";//长连接关闭 } fwrite($fp, $header); //-----------------调试代码区间----------------- //注如果开启下面的注释,异步将不生效可是方便调试 if($debug){ $html = ''; while (!feof($fp)) { $html.=fgets($fp); } echo $html; } //-----------------调试代码区间----------------- fclose($fp); } $data=array('name'=>'guoyu','pwd'=>'123456'); $url='http://localhost/test/other.php'; request_by_fsockopen($url,$data,true);//
other.php
<!--?php header("content-type:text/html;charset=utf-8"); //error_reporting(0); //ini_set('html_errors',false); //ini_set('display_errors',false); $name = isset($_POST['name'])?$_POST['name']:''; $pwd = isset($_POST['pwd'])?$_POST['pwd']:''; echo $name.$pwd; echo 'success ok'; die; ?-->
Usage example:
[main.php main script file to run]
$data=array('name'=>'guoyu','pwd'=>'123456');
$url='http://localhost/test/other.php';
request_by_fsockopen($url,$data,true);//Asynchronously-synchronize the user table of application B
[Guide execution file other.php]
In other.php, you can use $_POST to receive the parameters submitted by main.php to proceed with the next step

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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