


Introduction to fastcgi_finish_request in php and its non-blocking code
This article brings you an introduction to fastcgi_finish_request in PHP and its non-blocking code. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.
Preface
In actual projects, there is often such a demand. Requests sent from the front end need to be processed for a long time in the back end, but in order to provide users with better Experience, in order to prevent PHP from blocking when processing long-term tasks on the backend and quickly respond to page requests, the application of fastcgi_finish_request is summarized here. Of course, there are many ways to implement non-blocking in PHP, such as asynchronous scripts and swoole, but personally I think fastcgi_finish_request is the simplest and most convenient.
Basic application
fastcgi_finish_request introduction
(PHP 5 >= 5.3.3, PHP 7)
fastcgi_finish_request — flush all responses Data to client
boolean fastcgi_finish_request (void)This function flushes all response data to the client and ends the request. This allows tasks that take a long time to run to continue running after the client ends the connection.
Return value
Returns TRUE on success, or returns FALSE on failure
Attention issues
PHP and Web server use If PHP-FPM (FastCGI Process Manager) is installed, the session can be ended immediately through the fastcgi_finish_request() function, and the PHP thread can continue to run in the background. That is to say, this function can only be used for the process management method of php-fpm
As long as the code runs to this location, the request has been disconnected and the parameters have been returned to the client. The following code has nothing to do with the client. That is to say, the content output on the page must be placed before the fastcgi_finish_request function
After fastcgi_finish_request() ends the client connection, the running time will still be affected by the max_execution_time timeout, that is to say If it is expected that the code will take a long time to execute on the backend, you still need to set set_time_limit(0)
. If the execution time is too long under high concurrency, the fastcgi process will not be used enough and cannot be released in time. , a 502 error will occur.
Apply
echo "program start..."; file_put_contents('/tmp/garylog.log','start-time:'.date('Y-m-d H:i:s')."\n", FILE_APPEND); fastcgi_finish_request();sleep(1); // set_time_limit(0); // sleep(150); $num = 25; $num += 1; sleep(5); echo 'debug...'; file_put_contents('/tmp/garylog.log', 'start-proceed:'.$num.',时间'.date('Y-m-d H:i:s')."\n", FILE_APPEND); sleep(10); file_put_contents('/tmp/garylog.log', 'end-time:'.date('Y-m-d H:i:s')."\n", FILE_APPEND);
Run test
Compatible with non-php-fpm
In terms of code portability, you can attach the following code to the code:
if (!function_exists("fastcgi_finish_request")) { function fastcgi_finish_request() { } }
It will not cause code deployment to cause problems in non-fpm environments.
Ensure that the process runs in a single process
Regarding the problem mentioned above: Excessive execution time under high concurrency will also cause fastcgi The process is not enough and cannot be released in time. At the same time, our requirement is only for triggering and does not need to be run every time. Then we can consider using the following method to avoid duplicating the process.
$processId = realpath(__FILE__) . '-' . get_class($this); $filename = md5($processId); $file = '/tmp/'.$filename; if(!file_exists($filename)){ file_put_contents($file, getmypid()); }else{ return true; } ## do somthing 需要长时间处理的代码 //处理完成后删除进程id记录文件 unlink($file);
Related recommendations:
The magical fastcgi_finish_request in php
##PHP uses the fastcgi_finish_request() function to implement asynchronous operations and improve responding speed
The above is the detailed content of Introduction to fastcgi_finish_request in php and its non-blocking code. For more information, please follow other related articles on the PHP Chinese website!

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



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

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,

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

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.

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.
