Lecture 1

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1. How is PHP executed?

  • Process = HTML Output < Opcode < PHP Script < PHP Zend Engine
  • Proces = PHP Script > PHP Zend Engine > Opcode (operation code) > HTML Output
  • Process = Opcode > PHP Zend Engine > PHP Script > HTML Output
  • Process = PHP Zend Engine > PHP Script > Opcode > HTML Output
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2. Fourth Step in PHP Communication Flow?

  • Web Server checks the request and forwards it to the PHP app server if required (e.g., if the request is for a .php file).
  • Response will be sent by the web server via HTTP to the UA.
  • PHP App server will process the corresponding script and provide response to the web server.
  • A user agent acts on the user's behalf to request a server resourced based on the user's action (e.g., clicking a hyperlink) via HTTP.

3. 3rd Step in the PHP Communciation Flow?

  • Web Server checks the request and forwards it to the PHP app server if required (e.g., if the request is for a .php file).
  • UA renders the results and displays the webpage to the user.
  • PHP App server processes the corresponding script and provides response to the web server.
  • Response will be sent by the web server via HTTP to the UA.

4. Fifth Step in PHP Communication Flow?

  • PHP App server will process the corresponding script and provide response to the web server.
  • UA renders the results and displays the webpage to the user.
  • Response will be sent by the web server via HTTP to the UA.
  • A user agent acts on the user's behalf to request a server resourced based on the user's action (e.g., clicking a hyperlink) via HTTP.

5. Final Step in PHP Communication Flow?

  • Response will be sent by the web server via HTTP to the UA.
  • UA Renders the results and displays the webpage to the user.
  • Web Server checks the request and forwards it to the PHP app server if required (e.g., if the request is for a .php file).
  • A user agent acts on the user's behalf to request a server resourced based on the user's action (e.g., clicking a hyperlink) via HTTP.
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