Spaceship Operator¶
Spaceship operator is an operator which reports if a value is larger, equal or smaller than another value. It return 1, 0 or -1 in each case, respectively.
The spaceship operator may be replace by a - (minus) sign, if the compared values are correct. It may also be replace with !=, since -1 and 1 are both cast to true.
The spaceship operator got its name from its resemblance to an flying saucer. Battleship operator, or death star operator do not exist.
<?php
$a = 1;
$b = 3;
print $a <=> $b;
?>
See also https://www.exakat.io/en/weird-operators-in-php/, https://www.designcise.com/web/tutorial/what-is-the-php-spaceship-operator
Related : Comparison
Added in PHP 7.0
