简单教程
提交运行
代码编辑器：
<?php echo $_SERVER['PHP_SELF']; echo "<br>"; echo $_SERVER['SERVER_NAME']; echo "<br>"; echo $_SERVER['HTTP_HOST']; echo "<br>"; echo isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '' ; echo "<br>"; echo $_SERVER['HTTP_USER_AGENT']; echo "<br>"; echo $_SERVER['SCRIPT_NAME']; echo '<p>PHP 基础教程 - 简单教程(www.twle.cn)</p>';
运行结果：