Why does my PHP code appear to hang or freeze during execution, and how can I troubleshoot and fix the issue?

I’m starting learning php and the first thing is to run the Development Server to start practicing, i use commands of html and then the code php , and all of this indo a file php on vs code

and i receive this message
[Fri Dec 29 11:20:03 2023] PHP 8.2.12 Development Server (http://localhost:3000) started

and after waiting for a long amount of time i get this :

[Fri Dec 29 11:33:12 2023] [::1]:63950 Accepted
[Fri Dec 29 11:33:12 2023] [::1]:63951 Accepted

[Fri Dec 29 11:33:12 2023] [404] /projet.php – No such file or directory
[Fri Dec 29 11:33:12 2023] [::1]:63950 [404]: GET /projet.php – No such file or directory

[Fri Dec 29 11:33:12 2023] [::1]:63950 Closing

[Fri Dec 29 11:33:12 2023] [404] /favicon.ico – No such file or directory [Fri Dec 29 11:33:12 2023] [::1]:63951 [404]: GET /favicon.ico – No such file or directory

[Fri Dec 29 11:33:12 2023] [::1]:63951 Closing

[Fri Dec 29 11:37:20 2023] [::1]:63959 Accepted

[Fri Dec 29 11:37:20 2023] [404] /projet.php – No such file or directory
[Fri Dec 29 11:37:20 2023] [::1]:63959 [404]: GET /projet.php – No such file or directory
[Fri Dec 29 11:37:20 2023] [::1]:63960 Accepted

[Fri Dec 29 11:37:20 2023] [::1]:63959 Closing

[Fri Dec 29 11:39:03 2023] [::1]:63960 Closed without sending a request; it was probably just an unused speculative preconnection
[Fri Dec 29 11:39:03 2023] [::1]:63960 Closing

and even i do http://localhost:3000/index.php i didn’t get a result , i get always:

“The requested resource /projet.php was not found on this server.”