CodeIgniter框架基本增删改查操作示例

本文实例讲述了CodeIgniter框架基本增删改查操作。分享给大家供大家参考，具体如下：对于c

本文实例讲述了CodeIgniter框架基本增删改查操作。分享给大家供大家参考，具体如下：

对于codeigniter的增删改，在此我用自己的一个例子来说明一下：

创建数据库：

CREATE TABLE IF NOT EXISTS `users` (
 `id` int(10) NOT NULL AUTO_INCREMENT,
 `username` varchar(50) NOT NULL,
 `password` varchar(50) NOT NULL,
 `email` varchar(100) NOT NULL,
 `fullname` varchar(100) NOT NULL,
 PRIMARY KEY (`id`),
 UNIQUE KEY `username` (`username`),
 UNIQUE KEY `email` (`email`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Model

MTest.php

<?php
 class MTest extends CI_Model{
 public function __construct(){
 parent::__construct();
 $this->load->database();
 }
 //insert into data
 public function insert_users($arr){
 $this->db->insert('users',$arr);
 }
 //delete data
 public function delete_users($id){
 $this->db->where('id',$id);
 $this->db->delete('users');
 }
 //Alter data
 public function update_users($username,$arr){
 $this->db->where('username',$username);
 $this->db->update('users',$arr);
 }
 //select data
 public function select_users($id){
 $this->db->where('id',$id);
 $this->db->select('*');
 return $this->db->get('users');
 //注意如果你返回的是以下内容的话，他就是一个对象的结果集，这样当你返回controller中时，你就得转换；
// return $query->result();
 }
 }
?>

Controller

home.php

<?php
/**
 * xxx.php
 * ==============================================
 * Copy right 2012-2015
 * ----------------------------------------------
 * This is not a free software, without any authorization is not allowed to use and spread.
 * ==============================================
 * @Author:YeXianMing
 * @Email:LangWaiShiGe@hotmail.com
 * @Version:zend studio10.6.2 php5.4.38 apache2.2
 */
 if(!defined('BASEPATH'))exit('No direct script access allowed');
 class Home extends CI_Controller{
 public function __construct(){
 parent::__construct();
 }
 //insert data
 public function insert(){
 $this->load->model('MTest','',TRUE);
 $arr=array('username'=>'yexianming1','password'=>'admin','email'=>'11504160314qq.com','fullname'=>'luotianyexianming');
 if(!($this->MTest->insert_users($arr))){
 echo "插入数据成功";
 }else{
 echo "插入数据失败";
 }
 }
 //update data
 public function update(){
 $this->load->model('MTest','',TRUE);
 $arr=array('username'=>'Helloworld22','password'=>'root','email'=>'895787704@qq.com','fullname'=>'luotianyecong');
 if(!($this->MTest->update_users('Helloworld',$arr))){
 echo "修改成功";
 }else{
 echo "修改失败";
 }
 }
 //delete data
 public function delete(){
 $this->load->model('MTest','',TRUE);
 $query=$this->MTest->delete_users(12);
 if(!$query){
 echo "删除成功";
 }else{
 echo "删除失败";
 }
 }
 //select data
 public function select(){
 $this->load->library('table');
 $this->load->model('MTest','',TRUE);
 $arr=$this->MTest->select_users(3);
 $userinformation=$this->table->generate($arr);
 $data['userinfor']=$userinformation;
 $this->load->view('template',$data);
 }
 }
?>

view

temlate.php

<?php echo $userinfor;?>

output:

id username password email fullname
3 Helloworld22 root 1111111@qq.com luotianyecong