我正在开发一个 REST api，人们可以下载并扔到他们的服务器上，并在几乎没有编程知识的情况下使用它。 https://github.com/evanstoddard/REST-Easy。
我在设置页面使用 ajax，php 返回一个字符串供 ajax 查看并决定是继续下一步还是告诉用户修复错误。它似乎工作正常，然后突然之间它不会超过第一步。
在我的 javascript 中，我的日志中打印了来自 php 的返回值。第一步是让用户输入mysql服务器信息，如服务器url、用户名和密码。如果创建连接，则返回“成功”。我似乎正在获得“成功”。里面有空格或缩进。
在发生此错误之前，我注释掉了我正在处理的许多代码，并且错误仍然存在。我还在 if 块中添加了一个额外的缩进来检查返回，并且脚本成功了，所以在某处添加了额外的位。
我真的不想在这里发布我的代码，因为它有很多，而且有一堆移动部件可能不是最好的方法。
以下是其工作原理的简要说明：
用户输入（html 表单）->ajax-> 数据处理 php 脚本->class_database.php（打印success->ajax->html
适用代码：
html:
<form onsubmit="stepTwo('#stepOneForm'); return false;" id="stepOneForm">
<input type="hidden" name="task" value="1" />
<input type="text" class="inputText" id="serverURL" name="serverURL" placeholder="MySQL Server:" /><br />
<input type="text" class="inputText" id="serverUsername" name="serverUsername" placeholder="Username:" /><br />
<input type="text" class="inputText" id="serverPassword" name="serverPassword" placeholder="Password:" /><br />
<input type="submit" class="blueButton" value="Connect" />
</form>
Javascript（AJAX）：
function setupForm(form){
//console.log('Form function called.');
var formData = $(form).serialize();
$.ajax({
type: "POST",
url: "data/data_setup.php",
data: formData,
success: function(result) {
console.log(result)
function showAndTell(hide, show){
$(show).slideDown(600);
$(hide).delay(300).slideUp(600);
}
function showMessage(message, type, holdMessage){
var messageContainer = "#messageContainer";
var messageText = "#messageText";
var messageImage = "#messageImage";
var errorImage = "<img src='images/error.png' alt='Error' height='60px' width='60px' />";
var successImage = "<img src='images/success.png' alt='Error' height='60px' width='60px' />";
if (type === 'error'){
$(messageText).empty()
$(messageImage).empty()
$(messageText).append(message)
$(messageImage).append(errorImage)
$(messageContainer).slideDown(500)
if (!holdMessage) {
$(messageContainer).delay(7000).slideUp(500)
}
}
else if(type === 'success'){
$(messageText).empty()
$(messageImage).empty()
$(messageText).append(message)
$(messageImage).append(successImage)
$(messageContainer).slideDown(500)
if (!holdMessage) {
$(messageContainer).delay(7000).slideUp(500)
}
}
}
if(result === 'success'){
showAndTell('#stepOne', '#stepTwo');
showMessage('Successfully connected to MySQL database.', 'success');
}
else if (result === 'badaccess') {
showMessage('Unsuccessful. Please recheck information.', 'error');
}
else if (result === 'nserver') {
showMessage('Please enter a server URL.', 'error');
$('#serverURL').css('background', '#ffdadb');
}
else if (result === 'nserverusername') {
showMessage('Please enter a server username.', 'error');
$('#serverUsername').css('background', '#ffdadb');
}
else if (result === 'ndatabase') {
showMessage('No database with that name. Create it? <a href="#" onclick="createDatabase();">Yes</a> | <a href="#" onclick="cancelLink();">No</a>', 'error', true);
}
else if (result === 'database') {
showMessage('Successfully connected to that database.');
showAndTell('#stepTwo', '#stepThree');
}
else {
showMessage('Unknown error. Please try again later.', 'error');
}
}
});
}
PHP数据处理脚本：
<?php
//Include rest class
require_once('../../classes/class_rest.php');
//Get variables
$task = $_POST['task'];
$database_server = $_POST['serverURL'];
$database_username = $_POST['serverUsername'];
$database_password = $_POST['serverPassword'];
$rest_name = $_POST['restName'];
$username = $_POST['username'];
$password = $_POST['password'];
$confPassword = $_POST['confirm'];
$emailAddress = $_POST['emailAddress'];
$api_name = $_POST['apiName'];
$database_name = $_POST['databaseName'];
$table_prefix = $_POST['tablePrefix'];
if ($task == 1){
if($database_server == ''){
print('nserver');
}
else if($database_username == ''){
print('nserverusername');
}
else{
connectSQL($database_server, $database_username, $database_password);
}
}
else if ($task == 2){
if($rest_name == ''){
print('nrest');
}
else{
databaseDoesExist($rest_name);
}
}
else if ($task == 3){
if($username == ''){
print('nuser');
die();
}
if($emailAddress == ''){
print('nemail');
die();
}
if(!$confPassword == $password){
print('nconf');
die();
}
insertUser($username, $emailAddress, $password);
}
else if ($task == 4){
}
else if ($task == 5){
}
else if ($task == 6){
}
else if($task == 9){
createInitialDatabase();
}
else if($task == 10){
createConfigFile();
}
?>
功能class_database.php：
//Validates sql information
function connectSQL($server, $username, $password){
//Create sql connection
$con = mysqli_connect($server, $username, $password);
//Checks if connection was successful
if (mysqli_connect_errno($con)){
//Print 'badaccess' for ajax
print('badaccess');
}
//Run if connection successful
else{
//Print 'success' for ajax
print('success');
//Adds session variables for other sql commands later on
$_SESSION['server'] = $server;
$_SESSION['username'] = $username;
$_SESSION['password'] = $password;
}
}