What is the null coalescing operator in PHP7?

PHP: What is the null coalescing operator in PHP7?

The null coalescing operator is two question marks: ??. It is used to replace some ternary operations. Here is an example:

  1. // old way
  2. $var = isset($_GET['variable']) ? $_GET['variable'] : "default_val";
  3.  
  4. // new way - null coalescing:
  5. $var = $_GET["variable"] ?? "default_val";

Both of the above lines do the same thing: they set $var to $_GET['variable'] if it is set (if it passes isset()), but if not then it sets $var to 'default_val'.

webdevetc profile pic
webdevetc

I am a 29 year old backend web developer from London, mostly focusing on PHP and Laravel lately. This (webdevetc.com) is my blog where I write about some web development topics (PHP, Laravel, Javascript, and some server stuff). contact me here.



More...


Comments and discussion about What is the null coalescing operator in PHP7?

Found this interesting? Maybe you want to read some more in this series?

Or see other topics in the PHP language

Or see other languages/frameworks:
PHP Laravel Composer Apache CentOS and Linux Stuff WordPress General Webdev and Programming Stuff JavaScript
Or see random questions

How to eager load multiple levels of relationships in Eloquent?

What is the null coalescing operator in PHP7?

What is the difference between var, let and const in Javascript?

How to prevent Eloquent from adding created_at or updated_at timestamps?

How to Enable Directory Listings in Apache with .htaccess

How to return JSON data to the user in Laravel?

How to autoload helper files with composer?

How to find out which php.ini file PHP is using?

What is Bubble sort, and how to write an implementation of it in PHP

What is the difference between empty(), isset(), != null, is_null() in PHP