本文介绍了一段使用PHP设置Cookie并实现文件上传功能的代码示例。通过这段代码，可以了解如何在PHP中设置Cookie及如何构建一个简单的文件上传表单。
<!DOCTYPE html>
<?php
setcookie("user","ccc",time()+3600);
if (isset($_COOKIE["user"])){
echo "Welcome " . $_COOKIE["user"] . "!<br />";
}else{
echo "Welcome guest!<br />";
}
//echo $_COOKIE['user'];
?>
<html>
<meta charset="utf-8"/>
<body>
<form action="upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">文件名:</label>
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="Submit" />
</form>
</body>
<?php
setcookie("user","ccc",time()+3600);
if (isset($_COOKIE["user"])){
echo "Welcome " . $_COOKIE["user"] . "!<br />";
}else{
echo "Welcome guest!<br />";
}
//echo $_COOKIE['user'];
?>
<html>
<meta charset="utf-8"/>
<body>
<form action="upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">文件名:</label>
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="Submit" />
</form>
</body>
</html>
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