我想从xml文件中读取并打印标签属性名称，并使用ajax将其打印在屏幕上。我在file_controller.php文件中编写的代码在打印属性名称时效果很好，但ajax无法获取打印出来的数据保存在数据数组中。请大家帮我解决这个问题。数据库文件，xml文件都很好。它只是问题的ajax调用。在此先感谢
这是我的index.php代码，用于接收数据
<?php
require('connect.php');
?>
<html>
<head>
<title>Bellcom Test</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-md-9" style="margin:0 auto; float:none;">
<span id="message"></span>
<div class="form-group">
<label>Upload files</label>
<input type="file" name="file" id="file">
</div>
<br>
<div class ="form-group">
<label>Search for a File Number</label>
<input type="text" id="file_name" name="file_name">
</div>
<br>
<div class="form-group">
<button type="button" name="submit" id="submit" class="btn btn-info" >Fetch</button>
</div>
<div class="table-responsive" id="display" style="display:none">
<table class="table table-bordered">
<tr>
<td width="10%" align="right"><b>Attribute Name</b></td>
<td width="90%"><span id="name"></span></td>
</tr>
<tr>
<td width="10%" align="right"><b>System ID</b></td>
<td width="90%"><span id="sysid"></span></td>
</tr>
<tr>
<td width="10%" align="right"><b>Date</b></td>
<td width="90%"><span id="date"></span></td>
</tr>
</table>
</div>
</div>
</div>
</div>
</body>
</html>
<script>
$(document).ready(function(){
$('#submit').click(function(){
var id= $('#file_name').val();
if(id != '')
{
$.ajax({
url:"file_controller.php",
type: "POST",
data:{id:id},
dataType:"JSON",
success:function(data)
{
$('#meeting_details').css("display", "block");
$('#name').text(data.name);
$('#sysid').text(data.sysid);
$('#date').text(data.date);
},
error: function (data) {
alert("data is not received");
}
})
}else{
alert("Please Select a file");
$('#meeting_details').css("display", "none");
}
});
});
</script>
这是我的用于处理数据的php文件。
<?php
require('connect.php');
$f_name = "";
if (isset($_POST['id'])) {
$f_name = strip_tags($_POST['id']);//remvove html tags
$f_name = str_replace(' ', '', $f_name);//remove spaces
$f_name = strtolower($f_name);//lower case
$arr = array('XML_','.xml');
$f_name = implode("$f_name",$arr);
$database_file = mysqli_query($conn,"SELECT * FROM xml_files WHERE file_name='$f_name'");
$row = mysqli_fetch_array($database_file);
$database_file_name=$row['file_name'];
if (file_exists("files/$database_file_name")) {
$xml=simplexml_load_file("$database_file_name") or die("Error: Cannot create object");
foreach ($xml->children() as $node) {
foreach ($node->children() as $nodechild) {
foreach ($nodechild->children() as $nodegrandchild){
$arr = $nodegrandchild->attributes(); // returns an array
if (!empty($arr["name"])) {
$data['name'] = $arr["name"]; //save the attribute name in an array format
print ("name=".$arr["name"]); // get the value of this attribute
print ("<br>");
print ("<p><hr>");
}
if (!empty($arr["sysid"])) {
$data['sysid'] = $arr["sysid"];
print ("sysid=".$arr["sysid"]);
print ("<br>");
print ("<p><hr>");
}
if (!empty($arr["date"])) {
$data['date'] = $arr["date"];
print ("date=".$arr["date"]);
print ("<br>");
print ("<p><hr>");
}
}
}
}
}
echo json_encode($data);
}
?>
event.preventDefault()：$('#submit').click(function(event){
event.preventDefault()