W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
<!DOCTYPE html> <html> <body> <?php $x = array("a" => "red", "b" => "green"); $y = array("c" => "blue", "d" => "yellow"); print_r($x + $y); // $x 和 $y 的并集 ?> </body> </html>