我很困惑，我甚至无法解释我的问题。当我点击我的注册按钮时，它会重定向到index.php。它应该检查错误，而不是重定向或类似的东西。我尝试删除代码中的错误，更改ID，更改css属性。添加和删除JQuery。我真的不知道如何解决这个问题。
修改
在成功功能中，我尝试删除window.open()，但仍然会点击index.php重定向到#check_signup。我将在那里保留该行以显示原始代码的外观。代码不能重定向，因为代码尚未到达成功文本。
假设发生的是代码通过 check_signup.php 通过AJAX检查错误。然后该页面返回单词＆＃34; success＆＃34;如果代码全部正确执行。 script.js 中的代码然后检查单词＆＃34; success＆＃34;在重定向到index.php之前。
我尝试删除了ID #check_signup，并且页面没有重定向。当我尝试点击#check_signup时提醒页面时，它不起作用。因此，在单击元素注册之前，页面将重定向。
这是代码：
的script.js
$(document).ready(function() {
/* Sign Up Page */
$("#check_signup").click(function() {
var username_signup = $("#signup_container input[key='username_signup']").val();
var email_signup = $("#signup_container input[key='email_signup']").val();
var password_signup = $("#signup_container input[key='password_signup']").val();
$.ajax({
type: "POST",
url: "check_signup.php",
data: {username: username_signup, email: email_signup, password: password_signup},
success: function(data){
if(data.indexOf("Success")) {
window.open("index.php","_self");
} else {
$("#signup_container").html(data);
}
}
});
});
});
signup.php
<?php
require "connect.php";
?>
<!DOCTYPE html>
<html>
<head>
<title> Website </title>
<!-- CSS Files -->
<link href="https://fonts.googleapis.com/css?family=Open+Sans" rel="stylesheet">
<link href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet">
<link rel="stylesheet" href="css/styles.css">
<!-- JS Files -->
<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src='js/jquery.countdown.js'></script>
<script src='js/script.js'></script>
</head>
<body>
<!-- Navigation -->
<nav class="navbar navbar-default navbar-fixed-top">
<div class="container">
<div class="navbar-brand">
<a href="index.php"> <img src="http://logos-download.com/wp-content/uploads/2016/06/Udemy_logo.png" class="img-responsive" id="logo"> </a>
</div>
<div class="pull-right">
<a href='login.php'> <button type="button" class="btn btn-danger" id="login_button">Login</button> </a>
</div>
</div>
</nav>
<!-- End of Navigation col-md-3 portfolio-item -->
<div class="container">
<div class="row vertical-offset-100">
<div class="col-md-4 col-md-offset-4" id='login_form'>
<div class="panel panel-default">
<div class="panel-heading">
<h3 class="panel-title">Join for Free</h3>
</div>
<div class="panel-body" id='signup_container'>
<form>
<fieldset>
<div class="form-group">
<input class="form-control" placeholder="Username" name="username" type="text" key='username_signup' autocomplete="off">
</div>
<div class="form-group">
<input class="form-control" placeholder="Email" name="email" type="text" key='email_signup' autocomplete="off">
</div>
<div class="form-group">
<input class="form-control" placeholder="Password" name="password" type="password" value="" key='password_signup' autocomplete="off">
</div>
<input class="btn btn-lg btn-primary btn-block" type="button" value="Sign Up Now" id='check_signup'>
</fieldset>
</form>
</div>
</div>
</div>
</div>
</div>
<!-- End of Login Page -->
check_signup.php
<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
<script src='js/script.js'></script>
<?php
require "connect.php";
error_reporting(0);
// Variables
$username = $_POST["username"];
$email = $_POST["email"];
$password = $_POST["password"];
$md5_password = md5($password);
// Username
echo " <form>
<fieldset>";
if(strlen($username) < 3) {
echo "<div class='form-group has-error'>
<label class='control-label' for='inputError1'>Username requires 3 characters</label>
<input type='text' class='form-control' id='inputError1' key='username_signup' value='$username'>
</div>";
} else {
$username_count++;
}
if(strlen($username) > 25) {
echo "<div class='form-group has-error'>
<label class='control-label' for='inputError1'>The username is limited to 25 characters</label>
<input type='text' class='form-control' id='inputError1' value='$username' key='username_signup'>
</div>";
} else {
$username_count++;
}
$check_user = $db->query("SELECT * FROM users WHERE username='$username'");
$num_user = $check_user->num_rows;
if($num_user == 0) {
$username_count++;
} else {
echo "<div class='form-group has-error'>
<label class='control-label' for='inputError1'>Username Taken </label>
<input type='text' class='form-control' id='inputError1' value='$username' key='username_signup'>
</div>";
}
if($username_count == 3) {
echo "<div class='form-group'>
<input class='form-control' placeholder='Username' name='username' type='text' id='username_signup' value='$username' key='username_signup'>
</div>";
}
// End of Username
// Email
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
// invalid emailaddress
echo "<div class='form-group has-error'>
<label class='control-label' for='inputError1'>Invalid Email</label>
<input type='text' class='form-control' id='inputError1' value='$email' key='email_signup'>
</div>";
} else {
$email_count++;
}
$check_email = $db->query("SELECT * FROM users WHERE email='$email'");
$num_email = $check_email->num_rows;
if($num_email == 0) {
$email_count++;
} else {
echo "<div class='form-group has-error'>
<label class='control-label' for='inputError1'>Email Taken</label>
<input type='text' class='form-control' id='inputError1' value='$email' key='email_signup'>
</div>";
}
if($email_count == 2) {
echo "<div class='form-group'>
<input class='form-control' placeholder='Username' name='username' type='text' id='username_signup' value='$email' key='email_signup'>
</div>";
}
// End of Email
// Password
if(strlen($password) < 6) {
echo "<div class='form-group has-error'>
<label class='control-label' for='inputError1'>Password requires 6 characters</label>
<input type='password' class='form-control' id='inputError1' value='$password' key='password_signup'>
</div>";
} else {
$password_count++;
echo "<div class='form-group'>
<input class='form-control' placeholder='Password' name='password' type='password' id='password_signup' value='$password' key='password_signup'>
</div>";
}
echo "<input class='btn btn-lg btn-primary btn-block' type='button' value='Sign Up Now' id='check_signup'>
</fieldset>
</form>";
// End of Password
if($username_count == 3 && $email_count == 2 && $password_count == 1) {
$db->query("INSERT INTO users VALUES('','$username','$email','$md5_password')");
$findID = $db->query("SELECT * FROM users WHERE username='$username' AND password='$md5_password'");
$fetchID = $findID->fetch_object();
$real_id = $fetchID->id;
session_start();
$_SESSION["username"] = $real_id;
echo "Success";
}
?>
我知道这是很多代码。我已经尝试了所有我能想到的东西。我确定这是一个简单的错误，但我不知道如何修复此代码。我试图修复代码以检查错误，而不是重定向回index.php。
答案 0 :(得分：1)
我之前发布了这个，以帮助其他人。所以也许这会让你走上正确的道路......在你认为合适的时候修补它，我希望它有所帮助！ ： - ）
请注意以下几点： 1.我没有使用表单标签。这消除了表单提交和重定向某些浏览器问题的正常操作。这也意味着您必须自己处理重定向。 2.验证字段在PHP中完成，并且在访问任何数据库之前也完成。这有助于限制对数据库的调用并节省资源。 我正在使用mysqli和准备好的声明。这是出于安全目的，在编码ANYTHING时应该是标准做法。 我正在检查大于和小于相同if字符的字符数。保持代码清洁。 我完成这些工作后，我正在关闭我的联系。这既适用于安全性，也适用于节省服务器上的资源。这是最好的做法。 6.我在整个代码中使用异常，必要时抛出异常。这有助于通过限制必须执行的if / else if / else循环次数来保持代码清洁。
//////////////// FORM HTML ////////////////
<div class="form" id="signupform">
<fieldset>
<div class="form-group">
<input class="form-control" placeholder="Username" id="user" type="text" key='username_signup' autocomplete="off">
</div>
<div class="form-group">
<input class="form-control" placeholder="Email" id="email" type="email" key='email_signup' autocomplete="off">
</div>
<div class="form-group">
<input class="form-control" placeholder="Password" id="pass" type="password" key='password_signup' autocomplete="off">
</div>
<input class="btn btn-lg btn-primary btn-block" type="button" value="Sign Up Now" id='signupbutton'>
</fieldset>
</div>
//////////////// JQUERY/AJAX CODE ////////////////
<script>
// Call form submit from on click action
$('#signupbutton').on('click', function(e){
// Prevent onclick even from propagating
e.stopPropagation();
// Set variables from form inputs
var user = $("#user").val(),
email = $('#email').val(),
pass = $('#pass').val();
// Initiate ajax call to external script
$.ajax({
type: 'POST',
url: 'postpage.php',
data: {
user : user,
email : email,
pass : pass
},
success: function(data){
if(data.indexOf("Success")) {
// Successful response
var successmessage = data;
alert(successmessage);
}
else {
// Error response
var errormessage = data;
alert(errormessage);
}
}
});
});
</script>
//////////////// PAGE TO POST AJAX TOO ////////////////
<?
# Start your try/catch statement to check for thrown exceptions (error messages)
try {
# Check for $_POST to initiate script
if( !empty($_POST) ){
# Loop through each post value
foreach( $_POST as $key => $val ){
# Check if each post value is empty and throw and exception and if not set it as a variable
if( !empty($val) ){
${$key} = trim($val);
}
else {
# Throw Exception (error message)
throw new Exception("Error, missing fields.");
}
}
# Check if $user is alphanumeric and is at least 3 to 25 characters
if( !ctype_alnum($user) || strlen($user) < 3 || strlen($user) > 25 ){
# Throw Exception (error message)
throw new Exception("Error, username must be alphanumeric and at least 3 to 20 characters.");
}
# Check if $email is valid
if( filter_var($email, FILTER_VALIDATE_EMAIL) ){
# Throw Exception (error message)
throw new Exception("Error, invalid email.");
}
# Check if $pass is at least 6 to 25 characters
if( strlen($pass) < 6 || strlen($pass) > 25 ){
# Throw Exception (error message)
throw new Exception("Error, password must be at least 6 to 25 characters.");
}
# Connection data
$servername = "";
$username = "";
$password = "";
$dbname = "";
# Make MYSQLI Connection
$mysqli = new mysqli($servername, $username, $password, $dbname);
if ( $mysqli->connect_errno ) {
# Throw connections error message
throw new Exception("Error, could not connect to database.");
}
# Prepare your query for execution
$stmt = $mysqli->prepare("SELECT `username`,`email` FROM `users` WHERE `username` = ? OR `email` = ?");
# Bind the two parameters to your statement
$stmt->bind_param("ss", $user, $email);
if ( $stmt === false ) {
# Throw Exception (error message)
throw new Exception("Error, could not process data submitted.");
}
# Excecute your query
$stmt->execute();
if ( $stmt === false ) {
# Throw Exception (error message)
throw new Exception("Error, count not execute database query.");
}
# Bind the results to a variable
$stmt->bind_result($users);
# Fetch your data from results
while($stmt->fetch()){
$foundusers = $users;
}
if ( $stmt === false ) {
# Throw Exception (error message)
throw new Exception("Error, could not get results from database.");
}
# Set counters for username and emails found
$usernames = 0;
$emails = 0;
# Loop through each database entry retrieved and check for matching usernames and emails
foreach( $foundusers as $thisuser ){
if( !empty($thisuser["email"]) && $thisuser["email"] == $email ){
# Add 1 to the $emails counter
$emails++;
}
if( !empty($thisuser["username"]) && $thisuser["username"] == $user ){
# Add 1 to the $usernames counter
$usernames++;
}
}
# close your statement
$stmt->close();
$thread = $mysqli->thread_id;
$mysqli->kill($thread);
#Check if matching usernames OR emails were found
if( $usernames > 0 || $emails > 0 ){
# Check if $usernames and $emails counter is great than 0
if( $usernames >= 1 && $emails >= 1 ){
# Throw Exception (error message)
throw new Exception("Error, username & email are taken.");
}
# Check if $usernames counter is great than 0
if( $usernames >= 1 ) {
# Throw Exception (error message)
throw new Exception("Error, username is taken.");
}
# Check if $emails counter is great than 0
if( $emails >= 1 ) {
# Throw Exception (error message)
throw new Exception("Error, email is taken.");
}
}
# Make MYSQLI Connection
$mysqli = new mysqli($servername, $username, $password, $dbname);
if ( $mysqli->connect_errno ) {
# Throw connections error message
throw new Exception("Error, could not connect to database.");
}
# Prepare your query for execution
$stmt = $mysqli->prepare("INSERT INTO `users` ( `username`, `email`, `password`) VALUES (?, ?, ?)");
# Bind the two parameters to your statement
$stmt->bind_param("sss", $user, $email, $pass);
if ( $stmt === false ) {
# Throw Exception (error message)
throw new Exception("Error, could not process data submitted.");
}
# Excecute your query
$stmt->execute();
if ( $stmt === false ) {
# Throw Exception (error message)
throw new Exception("Error, count not execute database query.");
}
# close your statement
$stmt->close();
$thread = $mysqli->thread_id;
$mysqli->kill($thread);
# Echo success message
echo "Success, account hase been created!";
}
else {
# Throw Exception (error message)
throw new Exception("Error, could not initiate script.");
}
}
# Catch any exceptions thrown and output the error
catch( Exception $e ) {
# Check if statement is still open and close it
if($stmt){
$stmt->close();
$thread = $mysqli->thread_id;
$mysqli->kill($thread);
}
# Echo success message
echo $e->getMessage();
}