Network transmission protocol - How do PHP programmers understand Unix system programming, network communication programming, asynchronous IO, etc.?

Because of the characteristics of PHP, many PHP people only know knowledge related to website development, but now there are extensions such as swoole and workman, so I would like to ask about this type of [Unix system programming, network communication programming, asynchronous io, multi-threading] knowledge, if you want to learn it, from the perspective of a PHP programmer, give me a learning route, thank you

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Because of the characteristics of PHP, many PHP people only know knowledge related to website development, but now there are extensions such as swoole and workman, so I would like to ask about this type of [Unix system programming, network communication programming, asynchronous io, multi-threading] knowledge, if you want to learn it, from the perspective of a PHP programmer, give me a learning route, thank you

Advanced Programming in UNIX Environment
UNIX Network Programming, Volume 1, Volume 2
Detailed Explanation of TCP/IP
In-depth understanding of computer systems
....

Bible "Advanced UNIX Programming"