php与mysql建立连接并执行SQL语句的代码_PHP教程

$conn = mysql_connect("localhost","root","") or die ("wrong!");
$sel=mysql_select_db("mydb",$conn);
$sql="INSERT INTO `mydb`.`test` (
`id` ,
`uid` ,
`regdate` ,
`remark`
)
VALUES (
'', 'php200', now( ) , 'dddd'
) ";
$que=mysql_query($sql,$conn);
if($que)
echo"true";
else
echo "wrong";
?>