What is the spaceship operator (<=>) in PHP?

PHP: What is the spaceship operator (<=>) in PHP?

The spaceship operator was a new feature in PHP 7. It looks like this: <==>

It will return 0 if both sides are equal. 1 if left is greater. -1 if right is greater.

  1.     var_dump( [
  2.  
  3.         "1 <=> 1" => 1 <=> 1,
  4.         "1 <=> 0" => 1 <=> 0,
  5.         "0 <=> 1" => 0 <=> 1,
  6.         "1 <=> \"1\"" => 1 <=> "1",
  7.         "\"abc\" <=> \"abc\"" => "abc" <=> "abc",
  8.         "\"zzz\" <=> \"abc\"" => "zzz" <=> "abc",
  9.  
  10.         ]);
array(6) {
  ["1 <=> 1"]=> 0
  ["1 <=> 0"]=> 1
  ["0 <=> 1"]=> -1
  ["1 <=> "1""]=> 0
  [""abc" <=> "abc""]=> 0
  [""zzz" <=> "abc""]=> 1
}
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 spaceship operator (<=>) in PHP?

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 force SSL in Apache's .htaccess?

How to block IP addresses in Apache by using regular expressions (regex) in .htaccess

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

How to disable file hotlinking in Apache with .htaccess

What are the SPL Iterators in PHP?

How to get the first row that matches some where queries, or create it if it doesn't exist (in Laravel's Eloquent)?

How to exclude URLs from the Laravel CSRF protection?

How to find the 2nd most common item in an array?

How to check if a object has a static variable defined?

How to replace whitespace with a single space