php mysqli 查

<?php 

$connect=mysqli_connect('127.0.0.1','root','root1','dbname');

if(!$connect){
    exit('链接错误'.mysqli_connect_error());
}
$arr=mysqli_query($connect,'select * from user');



while ($data=mysqli_fetch_assoc($arr)) {
	$dbdata[]=$data;
}

var_dump($dbdata);

//关闭连接
mysqli_close($connect);

 ?>