案例：PHP案例     状态：不可编辑再运行    进入竖版
 运行结果　
​x
 
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<!DOCTYPE html>
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<html>
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<body>
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​
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<?php
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echo $_SERVER['PHP_SELF'];
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echo "<br>";
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echo $_SERVER['SERVER_NAME'];
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echo "<br>";
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echo $_SERVER['HTTP_HOST'];
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echo "<br>";
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echo $_SERVER['HTTP_REFERER'];
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echo "<br>";
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echo $_SERVER['HTTP_USER_AGENT'];
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echo "<br>";
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echo $_SERVER['SCRIPT_NAME'];
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?>
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​
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</body>
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</html>