Introduction to PHP Operating Procedures and principles

I. Running PHP with the script command line
(1) Open cmd.exe (winkey+r)
(2) Find Php.exe (drag into cmd)
(3) Enter command php.exe-f "file actual path"
Note: Run code php.exe-r "code"
A concept:
In the running mode of Web software, a request is always initiated on the client (browser side), and then the server side generates a feedback action (that is, "Run" program), and therefore returns to the browser information-(response)
Two. Web Run process
1, browser input address, enter (send request)
2 Find the corresponding Web server according to the rules
(1) First find the corresponding IP in the native Hosts file
Location: Operating system/system32/drivers/etc/
Note: You need to open the editor as an administrator to edit and save his
(2) If not found in the hosts, find the corresponding IP on the Internet (DNS server)
(3) Still not found, terminating the request, returning the "server not found" prompt
3.web server obtains the corresponding file (that is, the requested file)
4. If necessary, process the file (PHP code execution)
5. Return the file (or execution result file) to the browser (return answer)
6. The browser accepts the file
7. Browser processing files (display/execution)
How PHP Web pages work