代码在这:
<?php
$connect = mysqli_connect(*localhost*,*root*,**,*dz*) or die(*Unale to connect*);
$sql = "INSERT INTO `catalog` (`name`) VALUES (*cc*);";
echo "1 record added"
mysqli_close($connect)
?>
数据库密码是空的, 数据库 名是dz.
用mysql 是可以的, 是mysqli, 就不行, 是代码错了吗? 请指教.

你query了吗？

mysqli的东西，可以参考http://git.oschina.net/sy/php-demo/blob/master/action/user-register/demo.php

谢谢, 是要用qurey.
我看这个例子好了.
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
mysqli_query($con,"INSERT INTO Persons (FirstName, LastName, Age)
VALUES (*Peter*, *Griffin*,35)");
mysqli_query($con,"INSERT INTO Persons (FirstName, LastName, Age)
VALUES (*Glenn*, *Quagmire*,33)");
mysqli_close($con);
?>
http://www.w3cschool.cc/php/php-mysql-insert.html

为什么有i？？？