php ternary operators

Basic True / False Declaration

$is_admin = ($user['permissions'] == 'admin') ? true : false;

Conditional Welcome Message

echo 'Welcome '.($user['is_logged_in'] ? $user['first_name'] : 'Guest').'!';

Conditional Items Message

echo 'Your cart contains '.$num_items.' item'.($num_items != 1 ? 's' : '').'.';

Conditional Error Reporting Level

error_reporting($WEBSITE_IS_LIVE ? 0 : E_STRICT);

Nested PHP Shorthand

echo 'Your score is:  '.($score > 10 ? ($age > 10 ? 'Average' : 'Exceptional') : ($age > 10 ? 'Horrible' : 'Average') );

Conditional PHP Redirect

header('Location: '.($valid_login ? '/members/index.php' : 'login.php?errors=1')); exit();

ref https://davidwalsh.name/php-ternary-examples