【发布时间】：2017-03-14 19:08:05
【问题描述】：
我正在尝试创建管理面板。 我在同一页面上创建了 2 个表单，我正在使用 Ajax 和 PHP 处理它们。
我已经编写了代码，但数据没有保存在数据库中。
Data_entry.php
这是我创建选项卡及其内容的前端代码文件。
<ul class="nav nav-tabs">
<li class="active"><a data-toggle="tab" href="#course">Course Entry</a></li>
<li><a data-toggle="tab" href="#exam">Exam Entry</a></li>
<li><a data-toggle="tab" href="#topic">Topic/Section Entry</a></li>
</ul>
<br>
<div class="tab-content">
<!-- Course Entry -->
<div id="course" class="tab-pane fade in active tab_wrapper">
<h3>Course Entry:</h3><hr>
<div id="message_course"></div>
<div id="message_course_success"></div>
<div class="form_entry">
<form>
<div class="form-group">
<label for="course_name">Course Name:</label>
<input type="text" class="form-control" id="course_name">
</div>
<button type="submit" name="course_submit" id="course_submit" class="btn btn-primary">Submit</button>
</form>
</div>
</div>
<!-- Exam Entry -->
<div id="exam" class="tab-pane fade in tab_wrapper">
<h3>Exam Entry</h3><hr>
<div id="message_exam"></div>
<div id="message_exam_success"></div>
<div class="form_entry">
<form>
<div class="form-group">
<label for="course_name">Exam Name:</label>
<input type="text" class="form-control" id="exam_name">
</div>
<div class="form-group">
<label for="exam_course_name">Course Name:</label>
<input type="text" class="form-control" id="exam_course_name">
</div>
<button type="submit" name="exam_submit" id="exam_submit" class="btn btn-primary">Submit</button>
</form>
</div>
</div>
<!-- Topic/Section Entry -->
<div id="topic" class="tab-pane fade tab_wrapper">
<h3>Topic Entry</h3>
<p>Some content in menu 2.</p>
</div>
</div>
Data_entry.js
这里我写了 javascript/Ajax 部分来处理表单数据。
$(document).ready(function(){
$("#course_submit").click(function(){
var cname = $("#course_name").val();
$.ajax({
type: "POST",
url: "data_entry_backend.php",
data: {coursename: cname, action: "course_submit"},
success: function(result){
if(result == 'true'){
$("#message_course_success").html("Successfully entered the data.");
$("#message_course").hide();
$("#message_course_success").fadeIn(700);
}else{
$("#message_course").html(result);
$("#message_course_success").hide();
$("#message_course").fadeIn(700);
}
}
});
return false;
});
$("#exam_submit").click(function(){
var ename = $("#exam_name").val();
var ecname = $("#exam_course_name").val();
$.ajax({
type: "POST",
url: "data_entry_backend.php",
data: {examname: ename, examcoursename: ecname, action: "exam_submit"},
success: function(result){
if(result == 'true'){
$("#message_exam_success").html("Successfully entered the data.");
$("#message_exam").hide();
$("#message_exam_success").fadeIn(700);
}else{
$("#message_exam").html(result);
$("#message_exam_success").hide();
$("#message_exam").fadeIn(700);
}
}
});
return false;
});
});
data_entry_backend.php
这是我编写后端代码以将数据存储在数据库中的地方
<?php
include 'core/init.php';
$con = $GLOBALS['con']; //$GLOBALS NOT $GLOBAL
$errors = array();
if(isset($_POST) === true && empty($_POST) === false){
if(isset($_POST['action']) && $_POST['action'] === "course_submit"){
$coursename = strtolower(sanitize($_POST['coursename']));
if(course_exists($coursename) === true){
echo "Course already exists!";
}
if(empty($coursename) === false){
echo "Please enter a value!";
}
$count_err = count($errors);
if(!empty($errors)){ // if there are errors then return them one by one to login.js and print them
for($i=0;$i<$count_err;$i++){ // else set the session by crosschecking username and password with database
echo $errors[$i].'<br>';
}
}
else{
mysqli_query($con,"INSERT INTO `courses` (`course_name`) VALUES('$coursename')");
$query_run = mysqli_query($con,"SELECT `course_id` FROM `courses` WHERE `course_name` = '$coursename'");
$query_result = mysqli_num_rows($query_run);
if($query_result == 1){
echo 'true';
}else{
echo 'Could not enter the data';
}
}
}
else if(isset($_POST['action']) && $_POST['action'] === "exam_submit"){
$examname = strtolower(sanitize($_POST['examname']));
$examcoursename = strtolower(sanitize($_POST['examcoursename']));
if(exam_exists($examname) === true){
$errors[] = "Course already exists!";
}
$count_err = count($errors);
if(!empty($errors)){ // if there are errors then return them one by one to login.js and print them
for($i=0;$i<$count_err;$i++){ // else set the session by crosschecking username and password with database
echo $errors[$i].'<br>';
}
}
else{
$result = mysqli_fetch_assoc(mysqli_query($con,"SELECT `course_id` FROM `courses` WHERE `course_name` = '$examcoursename'"));
$course_id =$result['course_id']
mysqli_query($con,"INSERT INTO `exams` (`exam_name`,`course_id`) VALUES('$coursename','$course_id')");
$query_run = mysqli_query($con,"SELECT `exam_id` FROM `exams` WHERE `exam_name` = '$examname'");
$query_result = mysqli_num_rows($query_run);
if($query_result == 1){
echo 'true';
}else{
echo 'Could not enter the data';
}
}
}
}
?>
【问题讨论】：
-
有什么错误吗？ PHP 是否返回任何内容？
-
那么到底是什么问题
-
他已经告诉问题“我已经写了代码，但是数据没有保存在数据库中。”
-
我会使用多个 php 文件，而不仅仅是
data_entry_backend.php。而是使用exam_form.php和course_form.php