Nullsafe

A nullsafe operator is able to carry a function or fail graciously to null. In particular, it won’t stop the execution with a fatal error.

There are two PHP operators that are nullsafe:

• nullsafe object operator ?->

• nullsafe-coalesce ??.

<?php

$a = foo();

$b = $a?->method();

$b = $a?->chain1?->chain2?->method();

// foo may return null
function foo() : ?A { }

?>

See also https://medium.com/@prevailexcellent/mastering-null-safety-in-php-8-a-comprehensive-guide-to-using-the-null-safe-operator-47835ba1140b, https://php.watch/versions/8.0/null-safe-operator

Related : Object Operator ->, Coalesce Operator

Added in PHP 8.0