有关php数据库接口技术的内容总结

<?php
//数据库操作
//1.导入数据库
require("../../public/dbconfig.php");
//2.连接数据库
$link=mysql_connect(HOST,USER,PASS) or die("数据库连接失败");
//3.选择数据库，设置字符集
mysql_select_db(DBNAME,$link);
mysql_set_charset("utf8");
//4.编写sql语句，发送sql语句到数据库
$sql="select * from users";
$res=mysql_query($sql,$link);
//5.解析结果集
while($user=mysql_fetch_assoc($res)){
echo "<tr align=&#39;center&#39;>";
echo "<td>{$userstate[$user[&#39;state&#39;]]}</td>";
echo "<td>{$user[&#39;username&#39;]}</td>";
echo "<td>".date("Y-m-d",$user[&#39;addtime&#39;])."</td>";
echo "<td>
<a href=&#39;edit.php?id={$user[&#39;id&#39;]}&#39;>修改</a> 
<a href=&#39;action.php?a=del&id={$user[&#39;id&#39;]}&#39;>删除</a>
</td>";
echo "</tr>";
}
mysql_free_result($res);
mysql_close($link);
?>

<?php>
//在advanced\common\config\main-local.php的conponents中配置好db；
//连接数据库
$connection = Yii::$app->db;
//编写预处理查询语句
$command = $connection->createCommand(&#39;SELECT * FROM post&#39;);
//执行操作
$posts = $command->queryAll();
$post = $command->queryOne();
$titles = $command->queryColumn();
<?php>

//数据表customer对象实例化
$customer = new Customer();
$customer->name = 'Qiang';
$customer->save(); // 一行新数据插入 customer 表