php常用技术
1. 连接数据库(connect.inc.php):
$dbhost = 'localhost';//数据库服务器
$dbuser ='root';//数据库用户名
$dbpwd = '';//数据库密码
$dbname = '';//数据库名
$db=new mysqli($dbhost,$dbuser,$dbpwd,$dbname);//建立一个mysql连接对象
if(mysqli_connect_errno())//检查是否连接成功
{
echo 'Error:Could not connect to database'.$dbname.'Please try again later';
exit;
}
$db->query("set names 'utf8';"); //设定字符集
?>
在建立数据库连接后,通过引用include(“connect.inc.php”)就可以使用$db对象
2. DOMdocument建立xml文件
Xml是网络数据通信的重要形式,另一种则为json。
创建DOMdocument 对象:
$dom=new DOMdocument('1.0','iso-8859-1');
$dom->formatOutput = true;
创建根结点:
$root=$dom->appendChild($dom->createElement('root'));
为根结点添加元素:
$root>appendChild($log=$dom->createElement("log",$row['log_content']));
为节点添加属性:
$log->appendChild(new DOMAttr("id",$row['log_id']));
$log->appendChild(new DOMAttr("title",$row['log_name']));
$log->appendChild(new DOMAttr("date",$row['log_date']));

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