php判断当前域名是否指定域名

admin

1. <?php
   
2. if($_SERVER['HTTP_HOST']!='www.51digit.com')
   
3. {
   
4.         header("Location: [url]http://www.51digit.com[/url]",TRUE,301);
   
5. }
   
6. ?>

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当前域名不等于www.51digit.com就跳转到www.51digit.com