How to download and setup swoole-src
Open terminal and run command
                                            git clone https://github.com/swoole/swoole-src.git
                                        
                                        git clone is used to create a copy or clone of swoole-src repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with swoole-src https://github.com/swoole/swoole-src/archive/master.zip
Or simply clone swoole-src with SSH
                                            [email protected]:swoole/swoole-src.git                                    
                                    If you have some problems with swoole-src
You may open issue on swoole-src support forum (system) here: https://github.com/swoole/swoole-src/issuesSimilar to swoole-src repositories
Here you may see swoole-src alternatives and analogs
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