Using php to forge the IP layer

I want to use php to forge the IP layer and use php to forge the IP layer. Is there any idea? I don't need to use functions like system or exec in php to forge the IP layer .... let PHP use php to forge the IP layer at the bottom.
If I use php to forge the IP layer, is there any idea? I don't need to use functions such as system and exec in php.
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Counterfeit the IP layer... you want PHP to implement such a thing at the bottom, but you still cannot implement system exec...
Wait for two days for me to go to Peking Union Medical College Hospital to think about neurology...