Difference between PHP ??, ?:, and ??= - Stack Overflow

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Sun Jun 04 2023 15:23:16 GMT+0000 (Coordinated Universal Time)

Saved by @leninzapata #php

$user = $_POST['user'] ?? $_SESSION['user'] ?? $_COOKIE['user'] ?? '';
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https://stackoverflow.com/questions/72266190/difference-between-php-and