大家好, PHP 如何模拟多线程
大家好, PHP 如何模拟多线程
纠结了好久,也不行,
b.php的代码
/**<br /> *Run<br /> *多线程机制<br /> */<br /> function run($i){<br /> //连接服务器:注意如果你是以ssl/tls连接时,$host的值为:“ssl://www.example.com”即应加上"ssl://"前缀。<br /> //且$port值为443<br /> $host = $_SERVER['HTTP_HOST'];<br /> $port = 80;<br /> $fp = fsockopen($host,$port,$errorno,$errormsg); //连接服务器 <br /> if(!$fp){<br /> die("$errorno----------$errormsg");<br /> }else{<br /> <br /> $i = "i=$i";//传递的数据<br /> $path = '/a.php';//请求路径<br /> $method = 'POST'; //请求方法(POST方式)<br /> <br /> //HTTP的请求一般是GET或POST命令(POST用于FORM参数的传递)。格式为:方法 路径/文件名 HTTP/1.1/r/n(协议版本)<br /> $post = "$method $path HTTP/1.1/r/n"; <br /> //GET方式为:"GET /test/create_file.php?i HTTP/1.1/r/n";<br /> <br /> //Host头域指定请求资源的Intenet主机和端口号,必须表示请求url的原始服务器或网关的位置。HTTP/1.1请求必须包含主机头域,否则系统会以400状态码返回。<br /> $post .= "HOST: {$_SERVER['HTTP_HOST']} /r/n";<br /> <br /> //Content-Type实体头用于向接收方指示实体的介质类型,指定HEAD方法送到接收方的实体介质类型,或GET方法发送的请求介质类型。<br /> $post .= "Content-type: application/x-www-form-urlencoded/r/n";<br /> <br /> //Content-length它指示HTTP体信息的长度(字节)。<br /> $post .= "Content-length: ".strlen($i)."/r/n";<br /> <br /> $post .= "Connection: Close/r/n/r/n";<br /> <br /> $post .= "$i/r/n";//POST方式传递数据,在GET方式时,此处不要。<br /> fputs($fp,$post);<br /> }<br /> fclose($fp);<br /> }<br /> <br /> //触发多线程 <br /> for($i=0;$i<=2;$i++){<br /> run($i); <br /> }
a.php
$i = $_POST['i'];//GET方式请求时为:$i = $_GET['i']<br /> file_put_contents('d:s_'.$i.'_'.time().'.php',time());
------解决方案--------------------
刚刚学习php 呵呵
------解决方案--------------------
function conWrite($filename, $content) <br /> { <br /> $filename_lock = $filename.'.lock'; <br /> while(1) { <br /> if(file_exists($filename_lock)) { <br /> usleep(1000); <br /> } else { <br /> touch($filename_lock);//加锁 <br /> $f = fopen($filename, 'w'); <br /> fwrite($f,$content); <br /> fclose($f); <br /> unlink($filename_lock); <br /> break; <br /> } <br /> } <br /> if(file_exists($filename_lock)) { <br /> unlink($filename_lock); <br /> } <br /> }
------解决方案--------------------
个人采集经验,一直以来都是多线程就死机。。。感觉PHP对多线程的支持不太友好
------解决方案--------------------
php本身就不支持多线程

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.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.


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