How to install swoole? Frequently Asked Questions

Swoole is a high-performance PHP network communication framework that is increasingly used in the community. However, many developers encounter some problems when installing Swoole. In this article, we will introduce how to install Swoole and how to solve some problems you may encounter during the installation process.

Step One: Install Swoole

Before starting to install Swoole, make sure your PHP version is 7.0 or above. The following are the steps to install Swoole:

1. Install Swoole using PECL
We can use the following command to install swoole through PECL.

pecl install swoole

2. Manually compile and install Swoole
In some cases, the command executed by PECL may fail. In this case, we can manually compile the source code to install Swoole.

First, you need to download the source code from the Swoole official website: https://github.com/swoole/swoole-src/releases

After decompressing the file, visit Unzip the directory and run the following commands:

phpize
./configure
make
make install

After running these commands, Swoole will be compiled and installed on your server.

Step Two: Solve Problems You May Encounter

The following are some problems you may encounter when installing Swoole and how to solve them:

1. Error "error: 'PHP_FE_END' undeclared here (not in a function)"

This is an error caused by PHP_FE_END in the php.h file being undefined. To fix this, you need to edit the src/php_swoole.c file and change all instances of PHP_FE_END to NULL. Then re-run the compilation command.

2. Error “error: ‘zend_bool’ does not name a type”

This is an error caused by zend_bool not being defined correctly. Before solving this problem, you need to make sure your PHP version is at 5.6 or higher. To resolve this error, edit the src/php_swoole_client.c file and change all instances of "zend_bool" to "int". After that, recompile and install Swoole.

3. Error "Undefined symbol: uv_udp_init"

This is an error caused by the lack of libuv library. To solve this problem, install the libuv library. On Ubuntu, you can use the following command to install the library:

sudo apt-get install libuv-dev

On CentOS, you can use the following command to install the library:

sudo yum install libuv-devel

4. Error "Fatal error: swoole.h : No such file or directory"

This is an error caused by a missing Swoole header file. To resolve this issue, make sure Swoole is properly installed and add the following line to your php.ini file:

extension=swoole.so

This will ensure Swoole is loaded correctly.

In this article, we introduce how to install Swoole and the problems you may encounter during the installation process. By following the above steps and solutions, you should be able to successfully install and run the Swoole Network Communication Framework.

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