php中的require-once，phprequire-once
php中的require-once，phprequire-once
require_once语句和require语句完全相同，唯一区别是 PHP 会检查该文件是否已经被包含过，如果是则不会再次包含。
参见include_once的文档来理解_once的含义，并理解与没有_once时候有什么不同。
使用方法
define('__ROOT__',dirname(dirname(__FILE__)));
require_once(__ROOT__.'/config.php');
?>
方法二:
2例如：编辑
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
require_once('sys/config.php'); require_once('header.php'); ?>
系统平台一个简单的留言板系统平台 一个简单的留言板。
require_once('footer.php'); ?> |
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