PHP mysqli 数据库连接，查询

<?php

$link = mysqli_connect('127.0.0.1','root','admin');
mysqli_select_db($link,'dbdata');
mysqli_query($link,$sql);
mysql_query("set character set 'utf8'");//编码
mysql_query("set names 'utf8'"); //编码
//读库
$query = 'SELECT * FROM ABC';
$result = mysqli_query($link,$query);
// var_dump($result);
echo "<table border=1 width=300><tr><td>A</td><td>B</td></tr>";
$datanum = mysqli_num_rows($result);  //总数据数目
while($info = mysqli_fetch_array($result))
echo "<tr><td>".$info['a']."</td>";
echo "<td>".$info['b']."</td></tr>";
}
echo "</table>";
mysqli_close($link);

?>