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require_once
require
include
include_once
\n
\n
\n
require
<h1>我是头部</h1>
require 'header.php';
require 'header.php';
require 'header.php';
require 'header.php';
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require_once
require_once 'header.php';
require_once 'header.php';
require_once 'header.php';
require_once 'header.php';
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test.php
<?php
$username = 'king';
$age = 12;
echo __LINE__;
function test()
{
echo __FILE__;
}
?>
<?php
require_once 'test.php';
echo $username;
echo "<br/>";
test();
?>
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