封装一套自己的model类(增 删 查 改)
select * from news where 1 :默认子查询查询所有的条件 ,如果有其他的条件可以覆盖默认查询所有的条件
mysqli_insert_id //返回添加的id
mysqli_affected_rows();//返回删除的行数
例子:
header("Content-type:text/html;charset=utf-8");
class Model{ //封装一套自己的model类 //链接池 public $link = NULL; //链接表 public $tablename; //链接数据库配置 public function __construct($tablename) { $this->tablename = $tablename; //获取表名 $this->link = mysqli_connect(HOST,USER,PASS) or die("链接数据库失败"); mysqli_select_db($this->link,DB); mysqli_set_charset($this->link,"utf8"); } //查询单行语句 public function dbgetone($where="1") { $sql = "select * from {$this->tablename} where {$where}"; echo ($sql); $res = mysqli_query($this->link,$sql); $row = mysqli_fetch_assoc($res); return $row; } //查询多行语句 public function dbgetlist($where="1",$order="order by id desc",$limit="0,5") { $sql = "select * from {$this->tablename} where {$where} {$order} limit {$limit}"; $res =mysqli_query($this->link,$sql); $data = array(); while($row = mysqli_fetch_assoc($res)) { $data[] = $row; } return $data; } //添加语句 public function dbinsert($data=array()) { $str_key = ""; // `id`,`title`,`content` $str_val = ""; // 'asda','asd','asdas' foreach($data as $k=>$v) { $str_key .= $k.","; // `id`,`title`,`content`, $str_val .= "'".$v."'," ;//'asda','asd','asdas', } $str_key = substr($str_key,0,-1); //echo ($str_key)."<br>"; $str_val = substr($str_val,0,-1); //echo ($str_val);die; $sql = "insert into {$this->tablename} ({$str_key}) VALUES ({$str_val})"; //echo ($sql); $res = mysqli_query($this->link,$sql); return mysqli_insert_id($this->link);//返回添加的id } //修改语句 public function dbgetupdate($where,$data=array()) { $key_value_str = ""; //`title`="哈哈哈",`content`="嘻嘻嘻" foreach($data as $k=>$v) { $key_value_str .= $k."='".$v."',";//`title`="哈哈哈哈",`content`="嘻嘻嘻", } $key_value_str = substr($key_value_str,0,-1); //echo ($key_value_str);die; $sql = "update {$this->tablename} set {$key_value_str} where {$where}"; echo ($sql); $res = mysqli_query($this->link,$sql); } //删除语句 public function dbdelete($where) { $sql="delete from {$this->tablename} where {$where}"; //echo ($sql);die; $res = mysqli_query($this->link,$sql); return mysqli_affected_rows($this->link);//返回删除的行数 }public function dbcount()
{ //统计总条数 ceil(总条数 / 固定的条数) 得到总页数 $sql = "select count(*) as count from `{$this->tablename}`"; $res = mysqli_query($this->link,$sql); $row = mysqli_fetch_assoc($res); //print_r($row);die; $pageNum = $row['count'];//得到总条数 return $pageNum; } } define("HOST","127.0.0.1"); define("USER","root"); define("PASS","root"); define("DB","xiexie"); $m = new Model("news"); $id = 1; $b = $m->dbgetone("id=".$id); //print_r($b); $m = new Model("news"); $a = $m->dbgetlist(); print_r($a); $m = new Model("news"); $arr = ["title"=>"sadsa","content"=>"asdasda","time"=>"11-8","category_id"=>2]; $m->dbinsert($arr); $m = new Model("admin"); $m->dbdelete("id=6"); $m = new Model("admin"); $data = ["username"=>"aaaaaa","password"=>"bbbbbbbbbbb"]; $m->dbgetupdate("id=2",$data);
smarty
(1) : Smarty : 模板引擎 (视图分离(php 和 html 分离)) 用Smarty模板引擎mvc模式,Smarty模板写了自己的一套模板语法,且比较简单.
(2):Smarty版本 Smarty2版本 Smarty3版本Smarty用于ecshop框架比较多, ecshop做购物商城 (二次开发 )
头次开发 (自己封装低层代码) mvc 框架
libs:核心文件Smarty.class.php :Smarty核心文件
(3):安装
拷贝libs文件 加载libs文件下的Smarty.class.php存放视图文件 template: 视图 view:视图$smarty->template_dir = "template/"; //设置smarty视图分离中的模板的路径,以后所有的视图文件都放在template文件夹下面.存放程序编译文件
$smarty->compile_dir = "templates_c/";//设置smarty编译文件的路径html文件后缀名可以用:tpl后缀 html
参数传递:
$smarty->assign(‘标签名’,‘值');
加载视图文件:
$smarty->display("文件路径");
$smarty->display("1.tpl"); : 加载视图文件 页面循环输出值:循环列表 Smarty2版本:<{foreach from=$result key=k item=v}><{$k}><{/foreach}>Smarty3版本:
{foreach 标签名 as $k=>$v} {$k} {/foreach} {foreach $data as $k=>$v} {$k} {/foreach}设置两个备用属性 (为了防止页面里面的语法和Smarty语法起冲突)
如果没有设置备用属性,默认就是 {开始 结束} ; 如果设置了备用属性,那就必须按照备用属性使用 $smarty->left_delimiter = "<{"; $smarty->right_delimiter = "}>"; 输出单个值:<{标签名}> <{$name}>传入session的值$smarty->assign("username",$_SESSION['username']);$smarty语法可以传入数据类型的值,也可以传入超级数组的值.
模板的注释 <{*欢迎谢燕*}>//加载模板文件
<{include file="文件路径"}>设置缓存文件: (缓存开发时不启用,项目上线了之后启用)
$smarty->caching = true; //默认设置为1,默认为1个小时的周期,1个小时周期已过自动会清除缓存$smarty->caching = 2; //缓存各自的缓存(模板生成各自的缓存) 有各自的缓存周期
$smarty->cache_lifetime = 300; //执行代码之后.
设置缓存存放的文件
$smarty->cache_dir="缓存文件夹";
例子:
header("Content-type:text/html;charset=utf-8");
//加载核心文件
session_start(); require_once("libs/Smarty.class.php"); $smarty = new Smarty();//实例化得到Smarty类 //定义一个视图文件,存放html文件 $smarty->template_dir = "template/"; //程序编译文件 $smarty->compile_dir = "templates_c/";//设置smarty编译文件的路径 //设置缓存文件 $smarty->cache_dir = "cache/";//设置缓存文件 $smarty->caching = 2; //缓存各自的缓存(模板生成各自的缓存) 有各自的缓存周期 $smarty->cache_lifetime = 300; //执行代码之后. $arr = ["可爱","宝宝","贝贝"]; //设置定界符 $smarty->left_delimiter = "<{"; $smarty->right_delimiter = "}>"; $name = "哈哈"; $_SESSION['username'] = "aaa"; /*foreach($arr as $k=>$v) { print_r($v); } */ $smarty->assign("data",$arr); $smarty->assign("name",$name); $smarty->assign("username",$_SESSION['username']);$smarty->display("1.tpl"); $smarty->display("2.html");
1.tpl
2.html