关于readfile的问题_PHP
有代码如下：
$DOCUMENT_ROOT=$_SERVER['DOCUMENT_ROOT'];
readfile("$DOCUMENT_ROOT/fopen.txt");
fclose($fp);
?>
为什么除了正常显示文本信息，还显示Warning: fclose(): supplied argument is not a valid stream resource in D:\php\test_fgets.php on line 4
如果去掉fclose($fp);这行就没有任何错误提示，请问这是为什么？[PHP]
readfile
file
fpassthru
这些函数不需要用fclose关闭
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