PHP7 - New Feature! Null coalescing operator. Quickly do isset check and defines.

php-isset-ternary.php

<?php

/**
 * The new null coalescing operator! 🎉
 * @see http://php.net/manual/en/migration70.new-features.php#migration70.new-features.null-coalesce-op
 */
$username = $_GET['user'] ?? 'nobody';

// The old way. 🙅
$username = isset( $_GET['user'] ) ? $_GET['user'] : 'nobody';

// The _really_ old way. 🙅
if ( isset( $_GET['user'] ) ) {
	$username = $_GET['user'];
} else {
	$username = 'nobody';
}