例子：建立本身的mysql數據庫操做類

思路，通過前面面向對象的開發，考慮能夠把PHP對MYSQL數據庫的操做封裝到一個類中，經過面向對象的方式開發。

首先創建 mysql_class.php

<?
class mysql {
private $name;
private $pass;
private $host;
private $table;
function __construct($host,$name,$pass,$table){
    $this->host=$host;
    $this->name=$name;
    $this->pass=$pass;
    $this->table=$table;
    $this->connect();
    }
function connect(){
    $db=mysql_connect($this->host,$this->name,$this->paass) or die (mysql_error());
    mysql_select_db($this->table,$db) or die ("沒有該數據庫".$this->table);
    }
function query($v)
{
    $query = mysql_query($v) ;
    return $query;
}
function fn_select($table,$num){
    return $this->query("select * from $table limit $num ");
}
function fn_insert($table,$name,$value){
    $this->query("insert into $table ($name)value($value)");
}
function error(){
    return mysql_error();
    }
function __call($n,$v){
    echo "錯誤的方法爲".$n;
    echo "錯誤的值爲".print_r($v);
    }
}
?>

二，在須要的頁面用自動加載函數加載實例化對象的方式來輸出

<?
header("Content-Type:text/html; charset=utf-8");
function __autoload($name){
    include ($name."_class.php");
    }
    $db = new mysql("localhost","root","","youbaopaidakuo");
    $db->query("set names utf8");
    $query = $db->fn_select("ecm_article",20);

    while($arr=mysql_fetch_array($query))
    {
        echo $arr[title]."<br>";
    }
?>