W3School TIY Editor
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暗黑模式
<!DOCTYPE html> <html> <body> <?php // 如果 empty($user) 为 TRUE，设置 $status = "anonymous" echo $status = (empty($user)) ? "anonymous" : "logged in"; echo("<br>"); $user = "Bill Gates"; // 如果 empty($user) 为 FALSE，设置 $status = "logged in" echo $status = (empty($user)) ? "anonymous" : "logged in"; ?> </body> </html>