php multiple null coalescing operator code example

Example: null coalescing operator php

// The null coalescing operator (??) is used to replace the ternary operation
// in conjunction with isset() function and returns its first operand if it
// exists and is NOT NULL; otherwise it returns its second operand.
$username = $_GET['username'] ?? 'not passed';

// Equivalent code using ternary operator
$username = isset($_GET['username']) ? $_GET['username'] : 'not passed';

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