Research Documentation 05 Php

Research Documentation 05 Php

5R What's new in 8.2

Readonly Classes

While readonly classes were actually introduced in 8.1, 8.2 adds what stitcher.io calls "syntactic sugar". Instead of creating the class and then having to declare each property of the class readonly individually you can now create the class as readonly and all of the properties of the class inherit the readonly attribute from the class.

mysqli_execute_query

8.2 introduces mysqli_execute_query function and method. This new function is a combination of mysqli_prepare, _execute, and _stmt_get_result() functions. With the new function the MySQLi query will be prepared, bound, and executed within the function itself If it's successful it will return a mysqli_result object. If not it'll return false.

Deprecate ${} String Interpolation

According to kinsta.com PHP allows embedding variables in strings with double-quotes (") and heredoc (<<<) in several ways (I had to look up heredoc. And from what I understand inserting a heredoc causes a section of source code to be treated as a seperate file):

  1. Directly embedding variables - "$foo"
  2. With braces outside the variable - "{$foo}"
  3. With braces after the dollar sign- "${foo}"
  4. Variable variables — “${expr}” — equivalent to using (string) ${expr}

PHP 8.2 deprecates the last two ways of string interpolation. In 9 using these will cause exception errors. So stop using them now.

Summary

If I understood half of what I read about 8.2 I wouldn't be taking this class. I picked 3 changes that I could at least half grasp the concepts. I think what I learned most in this exercise is the importance of understanding deprecation, and knowing what has been deprecated to prevent issues in the future.