BackDoor in PHP

Hello, i have a question regardings backdoor. I have see that there is a lot of backdoor code in php but i don't undersand how a language that is made for server side can be use on the target computer. I tried to use the php backdoor on replit and i can see the content of the replit server so i assume when i put it on the target computer i will see his file. The problem is that i need to heberg a web server on the targer computer. How it can be possible ? and do i need to connect to his IP to see the web server ?
Sorry for my English, I am French

submitted by /u/Ok-Tap5729
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from hacking: security in practice https://ift.tt/jKLD4J5

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