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
}
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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.



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