PSR Standards & HTTP Messages

Question 1

PSR 4 is…

Answer 1

Autoloading Standard, describes how namespaces should be built and the corresponding directory structure.

Question 2

Which PSR describes how HTTP Messages (Requests and Responses) need to be structured?

Answer 2

PSR 7 HTTP Message Interface

Question 3

Which PSR dictates Constants are in UPPER_CASE?

Answer 3

PSR-1 Basic Coding Standard

Question 4

Which PSR describes the standard for dependency injection?

Answer 4

PSR 11 Container Interface

Question 5

PSR 18 …

Answer 5

HTTP Client, describes handling of sending http requests with a client Object.

Question 6

HTTP Factories are what PSR and what purpose?

Answer 6

PSR 17, Mainly offers interfaces for Factories creating Request and Response objects.

Question 7

In which PSR is described what behaviour an Event Listener should have?

Answer 7

PSR 14 Event Dispatcher

Question 8

Psr 7 is…

Answer 8

Caching Interface

Question 9

Logging is described in PSR…

Answer 9

PSR-3 Logger Interface

Question 10

What Log Levels exist?

Answer 10

DEBUG, NOTICE, INFO, CRITICAL, WARNING, ALERT, ERROR, EMERGENCY

Question 11

In which PSR is stated that files containing only PHP MUST NOT end with “?>” ?

Answer 11

PSR-12 Extended Coding Style

Question 12

PSR-13 …

Answer 12

Hypermedia Links, describing Object Interfaces for a tag links in frontend in a PHP Foramt.

Question 13

Middleware is defined where?

Answer 13

PSR-15 HTTP Server Request Handlers

Question 14

Caching Libraries PSR?

Answer 14

PSR-16 Common Interface for Caching Libraries, basically caching libraries should work like the HTTP Cache does.

Question 15

Fill in the blanks for an HTTP Request:
____ ____ ____
Host: ____

____

• POST
• /path123
• HTTP/1.1
• argument1=value2
• chickenlittle.com

Answer 15

POST /path123 HTTP/1.1
Host: chickenlittle.com
argument1=value2