Overview of PHP shorthand

Question

I\'ve been programming in PHP for years now, but I\'ve never learned how to use any shorthand. I come across it from time to time in code and have a hard time reading it, s

Answer 1

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// Example usage for: Null Coalesce Operator
$action = $_POST['action'] ?? 'default';

// The above is identical to this if/else statement
if (isset($_POST['action'])) {
    $action = $_POST['action'];
} else {
    $action = 'default';
}