<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
</head>
<body>
{dede:name runphp='yes'}
$str = "hello ";
@me = $str;
@me .= "world";
{/dede:name}
<br>
--------------------------------
<br>
{dede:field runphp='yes'}
$str = "world";
$DedeMeValue="hello ";
$DedeMeValue .= $str;
{/dede:field}
<br>
--------------------------------
<br>
{dede:sql sql="select * From dede_archives limit 2"}
<p>·<a href="/plus/view.php?aid=[field:id/]">[field:title/]</a></p>
{/dede:sql}
--------------------------------
<br>
</body>
</html>
效果图：