PHP 8 Revealed: Use Attributes, the JIT Compiler, Union Types, and More for Web Development​

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2021

G. EngebrethPHP 8 Revealedhttps://doi.org/10.1007/978-1-4842-6818-6_9

9. Weak Maps

Gunnard Engebreth¹  

(1)

Madison, WI, USA

 

Date: 2019-11-04

Author: Nikita Popov

Votes: 25 / 0

Weak Maps are more than what the kids use to describe MapQuest. They have to deal with garbage collecting and memory management. Let’s first look at what a weak reference is. Weak References are used to reference an object while being eligible for garbage collection. Garbage collection occurs on objects that have no more references pointing to them. Weak Maps are collections of Weak References that do not prevent garbage collection on an object and will also be freed once the object is ...