php入门之连接mysql数据库的一个类

项目结构：

运行效果；

conn.php
代码如下:

<?php 
class ConnectionMySQL{ 
//主机 
private $host="localhost"; 
//数据库的username 
private $name="root"; 
//数据库的password 
private $pass=""; 
//数据库名称 
private $table="phptest"; 
//编码形式 
private $ut="utf-8"; 
//构造函数 
function __construct(){ 
$this->ut=$ut; 
$this->connect(); 
} 
//数据库的链接 
function connect(){ 
$link=mysql_connect($this->host,$this->name,$this->pass) or die ($this->error()); 
mysql_select_db($this->table,$link) or die("没该数据库：".$this->table); 
mysql_query("SET NAMES '$this->ut'"); 
} 
function query($sql, $type = '') { 
if(!($query = mysql_query($sql))) $this->show('Say:', $sql); 
return $query; 
} 
function show($message = '', $sql = '') { 
if(!$sql) echo $message; 
else echo $message.'<br>'.$sql; 
} 
function affected_rows() { 
return mysql_affected_rows(); 
} 
function result($query, $row) { 
return mysql_result($query, $row); 
} 
function num_rows($query) { 
return @mysql_num_rows($query); 
} 
function num_fields($query) { 
return mysql_num_fields($query); 
} 
function free_result($query) { 
return mysql_free_result($query); 
} 
function insert_id() { 
return mysql_insert_id(); 
} 
function fetch_row($query) { 
return mysql_fetch_row($query); 
} 
function version() { 
return mysql_get_server_info(); 
} 
function close() { 
return mysql_close(); 
} 
//向$table表中插入值 
function fn_insert($table,$name,$value){ 
$this->query("insert into $table ($name) value ($value)"); 
} 
//根据$id值删除表$table中的一条记录 
function fn_delete($table,$id,$value){ 
$this->query("delete from $table where $id=$value"); 
echo "id为". $id." 的记录被成功删除!"; 
} 
} 
$db = new ConnectionMySQL(); 
$db->fn_insert('test','id,name,sex',"'','hongtenzone','M'"); 
$db->fn_delete('test', 'id', 1); 
?>