PHP Fatal error: Call to undefined function pcntl_fork()
问题描述:
[root@localhost www]# /usr/local/php/bin/php index.php
PHP Fatal error: Call to undefined function pcntl_fork() in /home/www/theard/threadProcessManager.php on line 69
解决办法:
1、从新编译php
./configure --enable-pcntl ``````````
2、不重新安装也可以,直接进你安装php时的源码目录ext/pcntl目录。
运行
phpize
[root@localhost pcntl]# ./configure --with-php-config=/usr/local/php/bin/php-config && make && make install
把生成的文件放到默认的目录里:
[root@localhost pcntl]# cp /usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/pcntl.so /usr/lib/php/modules/
然后在php.ini里加上这个extension
extension=pcntl.so
如果不加直接在你的程序里加载它(用dl()函数,该函数将被取消)也可以,特别对于 php 除了cmdline还要和apache做web工作的时候,因为web服务的时候加载pnctl模块爱出问题。
测试办法
test_fork.php:
echo "This is an echo before I called the fork command\n";
$pid = pcntl_fork();
if ($pid == -1) {
die("could not fork");
} else if ($pid) {
echo "I am the parent, pid = ". $pid ."\n";
} else {
echo "I am the child, pid = ". $pid ."\n";
}
echo "This is an echo after I called the fork command\n";
?>

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

Alipay PHP...

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,

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

The enumeration function in PHP8.1 enhances the clarity and type safety of the code by defining named constants. 1) Enumerations can be integers, strings or objects, improving code readability and type safety. 2) Enumeration is based on class and supports object-oriented features such as traversal and reflection. 3) Enumeration can be used for comparison and assignment to ensure type safety. 4) Enumeration supports adding methods to implement complex logic. 5) Strict type checking and error handling can avoid common errors. 6) Enumeration reduces magic value and improves maintainability, but pay attention to performance optimization.

How to debug CLI mode in PHPStorm? When developing with PHPStorm, sometimes we need to debug PHP in command line interface (CLI) mode...

How to automatically set the permissions of unixsocket after the system restarts. Every time the system restarts, we need to execute the following command to modify the permissions of unixsocket: sudo...

Sending JSON data using PHP's cURL library In PHP development, it is often necessary to interact with external APIs. One of the common ways is to use cURL library to send POST�...
