代码展示：
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-cn"> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> 5 <title>网页标题</title> 6 <meta name="keywords" content="关键字列表" /> 7 <meta name="description" content="网页描述" /> 8 <link rel="stylesheet" type="text/css" href="" /> 9 <style type="text/css"></style> 10 <script type="text/javascript"></script> 11 </head> 12 <body> 13 <?php 14 $v1 = 1; //全局变量 15 $v2 = 2; 16 function f1(){ 17 $v3 = 3; //局部变量 18 $v4 = 4; 19 echo "<br />函数f1被调用！"; 20 } 21 f1(); 22 echo "<pre>GLOBALS数组内容为：<BR />"; 23 var_dump($GLOBALS); 24 echo "</pre>"; 25 ?> 26 </body> 27 </html>