One of the most important (and controversial) new features in PHP 7 is the option to use strict data types, in the form of parameter and return type declarations. Strict typing helps eliminate errors in more complex applications. Its use remains optional though, as many consider it a betrayal of the fundamental principles of a loosely typed language like PHP. In this course, David Powers explores the pros and cons of strict data types in PHP 5 and PHP 7.

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