我正在尝试让一些代码为 uni 分配工作，我仍在学习，但我觉得我有点疯狂地试图理解为什么类变量不起作用。
使用这样的 PHP 类
class Users {
//Variables
protected $_userName;
protected $_password;
protected $_login;
protected $_firstName;
protected $_lastName;
protected $_email;
protected $_phone;
protected $_addressStreet;
protected $_addressCity;
protected $_addressState;
protected $_company;
public function __construct() {
// gets the number of parameters
$numArgs = func_num_args();
$arg_list = func_get_args();
// make decisions based on the arguments number
switch($numArgs){
case "2":return $this->ConstructorWithTwoArgs($arg_list[0], $arg_list[1]);
case "10":return $this->ConstructorWithTenArgs($arg_list[0], $arg_list[1],$arg_list[2], $arg_list[3],$arg_list[4], $arg_list[5],$arg_list[6], $arg_list[7],$arg_list[8], $arg_list[9]);
default:
//Handle exception for method not existing with that many parrams
break;
}
}
//In order to log in we require minimum of user name and password
protected function ConstructorWithTwoArgs($userName, $password){
$this->_userName = $userName;
$this->_password = $password;
$this->_login = "false";
return $this;
}
//Checks users details and updates user details if valid
public function DoLogin(){
$result = false;
// Check if userName and password exist in the db
$query = "SELECT * FROM SIT203Users WHERE USER_NAME = :userName AND PASSWORD = :password";
// Create a new connection query
$ds = new Connection();
$ds->parse($query);
$ds->setBindValue(':userName', $this->_userName);
$ds->setBindValue(':password', $this->_password);
$ds->execute();
//User exists if rows are returned there will only be one as userName is unique
if($ds->getNextRow()){
$result = true;
$this->_login = "true";
$this->_firstName = $ds->getRowValue("FIRST_NAME");
$this->_lastName = $ds->getRowValue("LAST_NAME");
$this->_email = $ds->getRowValue("EMAIL");
$this->_phone = $ds->getRowValue("PHONE");
$this->_addressStreet = $ds->getRowValue("ADDRESS_STREET");
//Ensure all street details are obtained
if($ds->getRowValue("ADDRESS_STREET2"))
$this->_addressStreet .= $ds->getRowValue("ADDRESS_STREET2");
$this->_addressCity = $ds->getRowValue("ADDRESS_CITY");
$this->_addressState = $ds->getRowValue("ADDRESS_STATE");
$this->_company = $ds->getRowValue("COMPANY");
}
$ds->freeResources();
$ds->close();
return $result;
}
}
现在这个类可以很好地直接调用它； http://www.deakin.edu.au/~jtparker/SIT203/xyz/flower_shop2/MyAccount.php?userName=JaieP&password=jp
<?php
require_once('initialise.php');
// Need to Validate all feilds and remove unwanted text
// The feilds to be tested are the $_REQUEST values
$userName = Validation::validateString(isset($_REQUEST['userName'])?$_REQUEST['userName']:"");
$password = Validation::validateString(isset($_REQUEST['password'])?$_REQUEST['password']:"");
$remberMe = isset($_REQUEST['remberMe'])?$_REQUEST['remberMe']:"";
// Create a new user
$newUser = new Users($userName, $password);
// Try and login
$newUser->DoLogin();
if($newUser->getLogin() == "true")
{
$_SESSION['user'] = $newUser;
// Echo out the users details plus cart details for last 3 months
//test its working to here
//echo($newUser->toString());
echo("Its working!!!");
}
else
{
//echo("falseValue");
echo($userName.$password.$remberMe.$newUser->getLogin().$newUser->getUserName().$newUser->DoLogin().$newUser->toString());
}
?>
但是，当我尝试使用下面的代码通过 javascript 调用使用它时，_login 变量无法更新，而对于我的一生，我无法弄清楚为什么？从这个链接可以看出； http://www.deakin.edu.au/~jtparker/SIT203/xyz/flower_shop2/myaccount.html 每次都失败？
任何想法在此先感谢杰伊
function TryLogin(){
try{
// Get the userName and password supplied
var userName = document.getElementById( "userName" );
var password = document.getElementById( "password" );
// Get the remember me value
var rememberMe = document.getElementById( "rememberMe" );
// Get the error feild
var errorDisplay = document.getElementById( "submitError" );
// set to no error
errorDisplay.innerHTML = "";
var documentMyAccount = document.getElementById( "myAccount" );
// Submit details to server for verification if not empty
if(userName.value != "" && password.value != ""){
// Now check via DB if username and password are valid
if (window.XMLHttpRequest)
{ // code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp=new XMLHttpRequest();
}
else
{ // code for IE6, IE5
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.readyState==4 && xmlhttp.status==200)
{
// IF Response indicates a successful login
var myResponse = xmlhttp.responseText;
if(myResponse != "falseValue"){
// set to nothing
documentMyAccount.innerHTML = "";
// add php content
documentMyAccount.innerHTML = myResponse;
}
else{
// Do not advise what details are incorrect, just that some combination is incorrect
errorDisplay.innerHTML = "Sorry those details are not correct";
}
}
}
var submitString = "MyAccount.php?";
submitString +="userName="+userName.value;
submitString +="&password="+password.value;
submitString +="&rememberMe="+rememberMe.checked?"true":"false";
xmlhttp.open("GET",submitString,true);
xmlhttp.send();
}
else{
errorDisplay.innerHTML = "Not all details have been entered!";
}
}
catch(error){
alert(error.message);
}
}