我需要一些帮助来理解如何在PHP中使用OOP来执行表单提交操作。手头的任务。。。我正在尝试学习如何使用OOP编写PHP代码。到目前为止，我已经了解了类、函数、调用函数、继承等的基本概念。
我创建了一个简单的练习项目，允许用户在某个位置搜索一顿饭。到目前为止，我有一个包含2个<input>字段的表单。通常，对于表单操作，我会执行<form action="actionFileName.php">，但现在我有了一个带有处理表单的函数的类，那么操作值该用什么呢？
我想创建一个类的实例并调用处理表单的函数，但我得到了一个找不到的Object！在我提交带有hungryClass.php中else语句的echo值的表单后的第页中，地址栏中显示。
我该怎么解决这个问题？谢谢
我的代码是什么样子的：HTML表单
<?php require_once 'hungryClass.php';
$newSearch = new hungryClass();
?>
<form action="<?php $newSearch->searchMeal();?>" method="post" id="searchMealForm">
<input type="search" size="35" placeholder="What Food Are you looking for?" id="mealName" class="meal"/>
<input type="search" placeholder="City Area" id="mealLocation" class="meal">
<input type="submit" value="Satisfy Me" id="findMeal" />
</form>
处理表单的页面（hungryClass.php）
<?php
require_once('dbConnect.php');
class hungryClass{
public function searchMeal(){
//call connection function.
$connect = new dbConnect();
//validate input
if(isset($_POST['mealName'])){
$meal = $_POST['mealName'];
//ensure value is a string.
$cleanse_meal = filter_var($meal, FILTER_SANITIZE_STRING);
echo $cleanse_meal;
}
else{
echo "Please supply the meal you crave";
}
//validate location
if(isset($_POST['mealLocation'])){
$location = $_POST['mealLocation'];
//validate and sanitize input. ensure value is a string.
$cleanse_location = filter_var($location, FILTER_SANITIZE_STRING);
echo $cleanse_location;
}
else{
echo "Please supply a location";
}
}
数据库类
<?php
class dbConnect{
private $host = "localhost";
private $user = "stacey";
private $pass = "";
private $db_name = "menu_finder";
private $connect;
//private static $dbInstance;
public function __construct(){
try{
$this->connect = new mysqli($host, $user, $pass, $db_name);
if(mysqli_connect_error()){
die('connection error('.mysqli_connect_errno().')' . mysqli_connect_error());
}
}
catch(Exception $e){
echo $e->getMessage();
}
}
？>
表单的action属性用于您要提交的脚本名称。您希望将表单提交给饥饿类进行处理，但只有实例化饥饿类后才能完成。你需要在表单中使用脚本名称作为操作值。假设你想提交到temp.php，你的表单应该像这个
<form action="temp.php" method="post" id="searchMealForm">
<input type="search" size="35" placeholder="What Food Are you looking for?" id="mealName" class="meal"/>
<input type="search" placeholder="City Area" id="mealLocation" class="meal">
<input type="submit" value="Satisfy Me" id="findMeal" />
</form>
然后当这些表单提交时，它将被发送到temp.php。要让饥饿的类处理这个表单，你需要在temp.php中创建一个实例，并使用这个实例调用searchMeal。temp.php应该看起来像这个
<?php
require_once 'hungryClass.php';
$newSearch = new hungryClass();
$newSearch->searchMeal();
?>
或者将所有内容放在一个文件中
<?php
require_once 'hungryClass.php';
if($_SERVER['REQUEST_METHOD'] == 'POST') {
$newSearch = new hungryClass();
$newSearch->searchMeal();
exit();
}
?>
<form action="<? echo $_SERVER['PHP_SELF']?>" method="post" id="searchMealForm">
<input type="search" size="35" placeholder="What Food Are you looking for?" id="mealName" class="meal"/>
<input type="search" placeholder="City Area" id="mealLocation" class="meal">
<input type="submit" value="Satisfy Me" id="findMeal" />
</form>
您应该将表单提交到一个php文件，该文件将处理表单。
<form action="<?php $newSearch->searchMeal();?>" method="post" id="searchMealForm">
应该是这样的：
<form action="formaction.php" method="post" id="searchMealForm">
在formaction.php中，你可以调用你的方法，当然你需要包括所需的文件：
<?php
$newSearch->searchMeal();
希望这能有所帮助。
以下是php中最简单的OOP代码你可以按照的方式试试
form.php
<?php
require_once 'DbClass.php';
?>
<form action="formaction.php" method="post" id="searchMealForm">
<input type="search" size="35" name='search1' placeholder="What Food Are you looking for?" id="mealName" class="meal"/>
<input type="search" placeholder="City Area" name='search2' id="mealLocation" class="meal">
<input type="submit" value="Satisfy Me" id="findMeal" name='butsearch' />
</form>
formaction.php
<?php
require_once 'DbClass.php';
$obj = new DbClass();
if(isset($_REQUEST['butsearch']))
{
$ser = $_REQUEST['search1'];
$ser2 = $_REQUEST['search2'];
$inf0 = array('ser1'=>$ser,'ser2'=>$ser2)
$obj->search($info);
}
?>
DbClass.php
<?php
//if any file needs to be included, include here
class Dboper
{
public function __construct() {
//DB Connection Code here
}
function serach($params)
{
$ser1 = $params['ser1'];
$ser2 = $params['ser2'];
//write query to search here
// call the corresponding page to display the result
}
}
?>
如果您有任何进一步的查询，请告诉我
OOP！。。
1.这里必须有一个条目，另一个主条目是控制器
action.php
<?php
include 'common.inc.php'; //they are hungryClass,dbConnect etc that you need required;
$do=$_POST['do'];
$hungry=new hungryClass();
if(!empty($do)){
if(method_exists($hugry,$do)){
$hugry->$do();
}else
echo 'method not exists;'
}
}
?>
2.form.html
<form action="action.php" method="post" id="searchMealForm">
<input type="search" size="35" placeholder="What Food Are you looking for?" id="mealName" class="meal"/>
<input type="search" placeholder="City Area" id="mealLocation" class="meal">
<input type="submit" value="Satisfy Me" id="findMeal" />
</form>
你不能只学习OOP，你也必须学习MCV。。。。