search
HomeBackend DevelopmentPHP Tutorial10 recommended articles about php popen() function

1. How does PHP popen realize the concurrent execution of multiple processes? The pclose in the loop will wait for the process to complete before proceeding to the next loop. 2. Assume that there are 17 processes to be started. How to start 5 processes at a time, close one process every time it is completed, and start the next process at the same time, which means that only 5 processes can be executed at the same time. //Start 2 processes for($i = 0;$i > $logFile$i"; echo "Process start time".date('Y-m-d H:i:s')."\n"; $resource = popen($command,'r'); if(is

1. Recommended articles about php pclose() function

10 recommended articles about php popen() function

##Introduction: 1. How does PHP popen realize the concurrent execution of multiple processes? The pclose in the loop will wait for the process to complete before proceeding to the next loop. 2. Assume that there are 17 processes to be started, how to start 5 processes each time , and every time a process is completed, one process is closed and the next process is opened at the same time, which means that only 5 processes can be executed at the same time at most //Start 2 processes for($i = 0;$i > $logF...

2. How does popen implement concurrent execution of multiple processes? pclose in the loop will wait for the process to complete Then proceed to the next cycle

Introduction: 1. How does PHP popen realize the concurrent execution of multiple processes. The pclose in the loop will wait for the process to complete before proceeding to the next loop. 2. Assume that there are 17 processes need to be started. How to start 5 processes at a time, close one process every time it is completed, and start the next process at the same time, which means that at most...

3. ffmpeg - php uses the popen method to implement asynchronous operations

Introduction: Use the popen method to perform a video transcoding operation. Asynchronous execution, how to know that the transcoding is completed?

##Introduction: Use the popen method to perform a video transcoding operation. In order for the transcoding to be executed asynchronously, how do you know that the transcoding is completed? .

##5. The popen function calls the local script and passes the parameters

##Introduction: The boss wants me to implement a php asynchronous For the function of sending emails, I searched for information on the Internet and found that popen can be used, so I initially wrote it like this: {Code...} This script uses phpmailer to send an email to my account. Now I want to pass parameters to this function: $to--recipient $content--within...

6. How to obtain root permissions on a mobile phone and let PHP execute system commands with ROOT permissions

Introduction: How to obtain root permissions on mobile phones: How to obtain root permissions on mobile phones and let PHP execute system commands with ROOT permissions: Used as a solution to the problem that some ordinary users cannot execute php with root permissions. A reference to a command or application. In fact, the popen() function in PHP can solve this problem, but due to system security considerations in some versions of Linux (such as Centos 5 I use), it makes solving this problem a lot more troublesome. Let’s first look at an example of a netizen using the popen() function. Copy the code as follows:/* How to add a system user in PHP. The following is a routine to add a user named james, roo

7. PHP Dangerous Functions Complete Analysis

Introduction:: Full analysis of PHP dangerous functions: When compiling PHP, if there is no special need, it must be prohibited to compile and generate PHP parsing support for CLI command line mode. Can be compiled using –disable-CLI. Once PHP in CLI mode is compiled and generated, an intruder may use the program to establish a WEB Shell backdoor process or execute arbitrary code through PHP. phpinfo() function description: Output PHP environment information and related module, WEB environment and other information. Danger level: Medium passthru() function description: Allow execution

8. How to let PHP execute system commands with ROOT permissions_PHP tutorial

Introduction: Let PHP execute system commands with ROOT permissions method. It is used as a reference to solve the problem of php executing some commands or applications that ordinary users cannot execute with root permissions. In fact, the popen() function in php can solve this problem, but due to some versions

9. linux exec and shell_exec function_PHP tutorial

Introduction: linux exec and shell_exec functions. ?php tutorial $test = ls /tmp/test; $out = shell_exec($test); echo $out; ? The return results of popen, passthru, proc_open, shell_exec are as follows: [root@krlcgcms01 shell]# php test.php 1001 .log 1

10. php popen implements multitasking_PHP tutorial

Introduction: php popen implements multitasking . Php code?php $update_num = 1000; $limit = 100; $p_num = 0; $line_cmd = ps -ef | grep doit.php | grep -v grep | wc -l; $exec_cmd = /usr/local/php/ bin/php doit.php %s /dev/null 21;

[Related Q&A recommendations]:

popen is blocked

php - How does popen realize the concurrent execution of multiple processes? The pclose in the loop will wait for the process to complete before proceeding to the next cycle

ffmpeg - php uses the popen method Problems in implementing asynchronous operations

How does popen implement concurrent execution of multiple processes? pclose in the loop will wait for the process to complete before proceeding to the next cycle

python - IOError: [Errno 32] Broken pipe

The above is the detailed content of 10 recommended articles about php popen() function. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

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.

How does PHP handle object cloning (clone keyword) and the __clone magic method?How does PHP handle object cloning (clone keyword) and the __clone magic method?Apr 17, 2025 am 12:24 AM

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 vs. Python: Use Cases and ApplicationsPHP vs. Python: Use Cases and ApplicationsApr 17, 2025 am 12:23 AM

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.

Describe different HTTP caching headers (e.g., Cache-Control, ETag, Last-Modified).Describe different HTTP caching headers (e.g., Cache-Control, ETag, Last-Modified).Apr 17, 2025 am 12:22 AM

Key players in HTTP cache headers include Cache-Control, ETag, and Last-Modified. 1.Cache-Control is used to control caching policies. Example: Cache-Control:max-age=3600,public. 2. ETag verifies resource changes through unique identifiers, example: ETag: "686897696a7c876b7e". 3.Last-Modified indicates the resource's last modification time, example: Last-Modified:Wed,21Oct201507:28:00GMT.

Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?Apr 17, 2025 am 12:06 AM

In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values ​​to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP: An Introduction to the Server-Side Scripting LanguagePHP: An Introduction to the Server-Side Scripting LanguageApr 16, 2025 am 12:18 AM

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP and the Web: Exploring its Long-Term ImpactPHP and the Web: Exploring its Long-Term ImpactApr 16, 2025 am 12:17 AM

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

Why Use PHP? Advantages and Benefits ExplainedWhy Use PHP? Advantages and Benefits ExplainedApr 16, 2025 am 12:16 AM

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools