我正在尝试使用ajax进行OOP登录，但是当我运行它时，我无法启动会话或将其重定向到“ Directivo.php”页面，我没有任何输出，我应该从哪里开始寻找吗？
bdcon.php这是我的数据库连接代码
<?php
class Conexion extends mysqli{
private $DB_HOST = 'localhost';
private $DB_USER = 'root';
private $DB_PASS = '';
private $DB_NAME = 'bdhtav2';
public function __construct(){
parent:: __construct($this->DB_HOST, $this->DB_USER, $this->DB_PASS, $this->DB_NAME);
$this->set_charset('utf-8');
$this->connect_errno ? die('Error en la conexion'. mysqli_connect_errno()) :
$M = 'Conectado Correctamente';
echo $M;
}
}
?>
classuser.php在这里，我执行定义登录操作的类
<?php
require "bdcon.php";
session_start();
class Users
{
public $user;
public $pass;
public function __construct($usuario, $contraseña)
{
$this->user=$usuario;
$this->pass=$contraseña;
}
public function login()
{
$db = new Conexion();
$sql = "SELECT * from user where username = ".$this->user." and password = ".$this->pass; $query = $db->prepare($sql);
$stmt = $db->prepare($sql);
$stmt->execute();
$count = $stmt->rowCount();
$row = $stmt->fetch(PDO::FETCH_ASSOC);
if($count == 1 && !empty($row)){
$_SESSION["USERNAME"] = $row["username"];
header('location: directivo.php');
}else{
echo"Error";
}
}
}
?>
acceso.php此处输入被填充，并通过AJAX发送到“ logeo.php”
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title> Log-In </title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
</head>
<body>
<!--Insentar navbar -->
<div class="container" style="margin-top:15%;">
<div class="row">
<div class="col">
</div>
<div class="col-md-7">
<H1 align="center">Inicio de Sesión</H1>
<h4 align="center">Directivos</h4>
<div class="input-group mb-3">
<div class="input-group-prepend">
<span class="input-group-text" id="inputGroup-sizing-default">Nombre de Usuario</span>
</div>
<input type="text" id="user1" class="form-control" aria-label="Default" aria-describedby="inputGroup-sizing-default">
</div>
<div class="input-group mb-3">
<div class="input-group-prepend">
<span class="input-group-text" id="inputGroup-sizing-default">Contraseña</span>
</div>
<input type="text" id="pass1" class="form-control" aria-label="Default" aria-describedby="inputGroup-sizing-default">
</div>
</div>
<button type="button" id="enviar" class="btn btn-primary btn-lg">Iniciar Sesión</button>
<span id="Mensaje"></span>
<div class="col"></div>
</div>
</div>
<script>
$(document).ready(function(){
function getErrorMessage(jqXHR, exception) {
var msg = '';
if (jqXHR.status === 0) {
msg = 'Not connect.\n Verify Network.';
} else if (jqXHR.status == 404) {
msg = 'Requested page not found. [404]';
} else if (jqXHR.status == 500) {
msg = 'Internal Server Error [500].';
} else if (exception === 'parsererror') {
msg = 'Requested JSON parse failed.';
} else if (exception === 'timeout') {
msg = 'Time out error.';
} else if (exception === 'abort') {
msg = 'Ajax request aborted.';
} else {
msg = 'Uncaught Error.\n' + jqXHR.responseText;
}
$('#Mensaje').html(msg);
}
$('#enviar').click(function(){
var user1 = $('#user1').val();
var pass1 = $('#pass1').val();
$.ajax({
type:"POST",
url:"logeo.php",
data:{user:user1,pass:pass1},
dataType:"html",
success: function(response){
$("#Mensaje").val(response.responseText);
alert("Ya puedes dormir");
},
error: function(jqXHR, exception){
getErrorMessage(jqXHR, exception);
}
});
});
});
</script>
</body>
</html>
logeo.php在这里，我调用login（）类并使用AJAX数据
<?php
require 'classuser.php';
$usuario = $_POST["user"];
$contraseña = $_POST["pass"];
echo $usuario;
$logeo=new Users($usuario, $contraseña);
$logeo->login();
?>
答案 0 :(得分：1)
几件事。看来您在开始会话之前回显了mysqli错误。必须先设置会话，然后才能将任何内容输出到浏览器。
这是我为您解决问题的建议。
Users类应该扩展Conexion类。session_start()应该始终是初始PHP脚本的第一行。您的情况是logeo.php脚本。logeo.php
<?php
session_start(); //Always first line. Has to be set before anything is sent out to the browser.
require 'bdcon.php';
require 'classuser.php';
$usuario = $_POST["user"];
$contraseña = $_POST["pass"];
echo $usuario;
$logeo=new Users($usuario, $contraseña);
$logeo->login();
?>
classuser.php
class Users extends Conexion
{
public $user;
public $pass;
public function __construct($usuario, $contraseña)
{
$this->user=$usuario;
$this->pass=$contraseña;
}
public function login()
{
$db = new Conexion(); //By extending the class you would not need to make a new instance of the Conexion class.
$sql = "SELECT * from user where username = ".$this->user." and password = ".$this->pass;
$stmt = $db->prepare($sql); ////By extending your class this could be something like "$this->db->prepare($sql);"
$stmt->execute();
$count = $stmt->rowCount();
$row = $stmt->fetch(PDO::FETCH_ASSOC);
if($count == 1 && !empty($row)){
$_SESSION["USERNAME"] = $row["username"];
header('location: directivo.php');
}else{
echo"Error";
}
}
}
?>
这应该使您朝正确的方向前进。您可能需要修改Conexion类，才能使其正常工作。