Meaning of '??' operator in php

Question

what is the meaning of '??' operator in php? I've seen someone using it like this. I've searched many results in google. But didn't found any solution.

$this->variable = $arg['value'] ?? NULL

http://php.net/manual/de/migration70.new-features.php – tkausl Sep 30 '18 at 20:27 — tkausl, Sep 30 '18 at 20:27

score 1 · Answer 1 · answered Sep 30 '18 at 20:30

1

?? is the new (since PHP 7) NULL coalescing operator. If the first argument is set and is not null it is returned, otherwise, the second argument is returned.

answered Sep 30 '18 at 20:30

Mureinik

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Meaning of '??' operator in php

1 Answers1