怎样样能够获取服务器和浏览器变量?
<html> <head> <title> 服务器和浏览器变量获取示例 </title> </head> <meta http-equiv=content-type content="text/html; charset=gb2312"> <body> <? echo "<h2 align=center >服务器和浏览器的信息</h2>/n"; echo "<hr color=red>"; echo "<p>"; echo "<table align=center width=80% border=1>/n"; echo "<tr><td>REMOTE_HOST</td><td>$REMOTE_HOST</td></tr>/n"; echo "<tr><td>SERVER_SOFTWARE </td><td> $SERVER_SOFTWARE</td></tr>/n"; echo "<tr><td>DOCUMENT_ROOT </td><td> $DOCUMENT_ROOT</td></tr>/n"; echo "<tr><td>REMOTE_ADDR </td><td> $REMOTE_ADDR</td></tr>/n"; echo "<tr><td>SERVER_PROTOCOL </td><td> $SERVER_PROTOCOL</td></tr>/n"; echo "<tr><td>REQUEST_METHOD </td><td> $REQUEST_METHOD</td></tr>/n"; echo "<tr><td>HTTP_USER_AGENT </td><td> $HTTP_USER_AGENT</td></tr>/n"; echo "</table>/n" ?> </body> </html>