记录一个CI、jquery、ajax(post)的计算器小例子

来源：互联网发布：php fpm mysql长连接编辑：程序博客网时间：2024/05/17 03:45

新手，记录一下做的练习

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视图代码

<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><title>CodeIgniter jquery ajax Test</title></head><body><div id="calculators">        <form>                <input type="text" id="num1" />                <select name="operate" id="operate">                        <option value="add">+</option>                        <option value="sub">-</option>                        <option value="mul">x</option>                        <option value="div">÷</option>                </select>                <input type="text" id="num2" />=                <input type="text" id="result" disabled="disabled"/>                <input type="button" id="calculate" value="calculate" />        </form></div><script type="text/javascript" src="/js/libs/jquery-2.1.1.min.js"></script><script type="text/javascript" src="/js/calculate.js"></script></body></html>

js代码

$(document).ready(function(){    $("#calculate").click(function(){        $.post("index.php/welcome/calculate",            {                num1:$("#num1").val(),                operate:$("#operate").val(),                num2:$("#num2").val()            },            function(data,status){                $("#result").val(data);            });    });});

控制器代码

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');class Welcome extends CI_Controller{    //constructor    public function __construct()    {        parent::__construct();        $this->load->model('calculate_model');    }    //default methodpublic function index(){$this->load->view('calculate_view');}//testfunction calculate() {            $num1 = $_POST['num1'];            $op = $_POST['operate'];            $num2 = $_POST['num2'];            $result = $this->calculate_model->calculate($num1, $num2, $op);            echo $result;    }}

模型代码

<?phpclass Calculate_model extends CI_Model {        function __construct() {                parent::__construct();        }        function calculate($num1, $num2, $op) {            $num1_ = (float)$num1;            $num2_ = (float)$num2;                if ($op == "add") {                        return $num1_ + $num2_;                }else if ($op == "sub") {                        return $num1_ - $num2_;                }else if ($op == "mul") {                        return $num1_ * $num2_;                }else if ($op == "div" && $num2_ != 0) {                        return $num1_ / 1.0 / $num2_;                }else {                        return -999;                }        }}

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