我正在尝试搜索一些数据，然后将其下载为CSV文件，但是当我单击“下载”按钮下载找到的数据时，它将在文件的开头写入所有HTML代码，然后将其写入数据在下载的文件中。那么，如何在不编写html代码的情况下仅获取数据呢？
代码
<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "CNG492";
$message = "";
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
?>
<html>
<head>
<title>Search By Keyword</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title> Upload Data Page</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />
<style>
table {
font-family: Raleway;
border-collapse: collapse;
width: 100%;
}
td, th {
border: 1px solid #dddddd;
text-align: left;
padding: 8px;
}
body
{
background-color: #722f37;
}
.btn{
background-color: #722f37;
color: #ffffff;
border: none;
padding: 10px 20px;
font-size: 17px;
font-family: Raleway;
cursor: pointer;
}
.box
{
background-color: #ffffff;
margin: 100px auto;
font-family: Raleway;
padding: 40px;
width: 80%;
min-width: 300px;
}
.has-error
{
border-color:#cc0000;
background-color:#ffff99;
}
.form{display:block;width:100%;height:34px;padding:6px 12px;font-size:14px;line-height:1.42857143;color:#555;background-color:#fff;background-image:none;border:1px solid #ccc;border-radius:4px;-webkit-box-shadow:inset 0 1px 1px rgba(0,0,0,.075);box-shadow:inset 0 1px 1px rgba(0,0,0,.075);-webkit-transition:border-color ease-in-out .15s,-webkit-box-shadow ease-in-out .15s;-o-transition:border-color ease-in-out .15s,box-shadow ease-in-out .15s;transition:border-color ease-in-out .15s,box-shadow ease-in-out .15s}
</style>
</head>
<body>
<div class="container box">
<br />
<h1 align="center">Search</h1><br />
<form method="post" id="search_form">
<div class="form-group">
<label>Keyword:</label>
<input type="text" name="keyword" id="keyword" class="form-control"/>
<span id="error_keyword" class="text-danger"></span>
</div>
<div align="inline">
<button type="button" name="find_keyword" id="find_keyword" class="btn btn-dark btn-lg">Find</button>
<a href="advanced_search.php"><button type="button" name="adv_search" id="adv_search" class="btn btn-dark btn-lg">Advance Search</button></a>
</div>
<br>
<?php
if(isset($_POST["keyword"])){
$keyword = mysqli_real_escape_string($conn,$_POST["keyword"]);
$dataset_result = -1;
//Search for keyword inside tables
$search_query = "SELECT dataset_id,title,description FROM dataset WHERE dataset_id IN (SELECT dataset_id FROM dataset WHERE title LIKE '%{$keyword}%' OR collector LIKE '%{$keyword}%' OR description LIKE '%{$keyword}%' OR d_procedure LIKE '%{$keyword}%'
UNION DISTINCT
SELECT dataset_id FROM group_table WHERE group_desc LIKE '%{$keyword}%'
UNION DISTINCT
SELECT dataset_id FROM material WHERE m_type LIKE '%{$keyword}%' OR URI LIKE '%{$keyword}%'
UNION DISTINCT
SELECT dataset_id FROM task WHERE type LIKE '%{$keyword}%' OR description LIKE '%{$keyword}%'
UNION DISTINCT
SELECT dataset_id FROM dataset WHERE eq_id IN (SELECT e.eq_id FROM tracker t,equipment e WHERE t.tracker_id=e.tracker_id AND (t.brand LIKE '%{$keyword}%' OR t.model LIKE '%{$keyword}%')))";
$search_result = $conn->query($search_query);
$dataset_result = mysqli_num_rows($search_result);
if ($dataset_result == 0) {
echo '
<div class="alert alert-success">
No reasults found.
</div>
';
}else{
echo '
<h4>Results</h4>
<table>
<tr>
<th>Title</th>
<th>Description</th>
<th>Dowload Link</th>
</tr>';
while ($row = mysqli_fetch_assoc($search_result)) {
echo '<tr>
<td>'.$row["title"].'</td>
<td>'.$row["description"].'</td>
<td><button type="submit" name="download" id="download" value="'.$row["dataset_id"].'">Dowload</button></td>
</tr>';
}
echo '</table>
';
if (isset($_POST["download"])) {
$d_id = $_POST["download"];
include 'download.php';
}
}
}
mysqli_close($conn);
?>
</form>
</div>
</body>
</html>
<script>
$(document).ready(function() {
$('#find_keyword').click(function(){
var error_keyword = '';
if($.trim($('#keyword').val()).length == 0){
error_keyword = 'Enter a keyword please.'
$('#error_keyword').text(error_keyword);
$('#keyword').addClass('has-error');
}else
{
error_keyword = '';
$('#error_keyword').text(error_keyword);
$('#keyword').removeClass('has-error');
}
if(error_keyword != ''){
return false;
}else{
$('#find_keyword').attr("disabled", "disabled");
$(document).css('cursor', 'prgress');
$("#search_form").submit();
}
});
})
</script>
Download.php
<?php
//include database configuration file
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "CNG492";
$message = "";
// Create connection
$connect = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($connect->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
//get records from database
$query = $connect->query("SELECT * FROM dataset");
if($query->num_rows > 0){
$delimiter = ",";
$filename = "members_" . date('Y-m-d') . ".csv";
//create a file pointer
$f = fopen('php://memory', 'w');
//set column headers
$fields = array('title', 'description');
fputcsv($f, $fields, $delimiter);
//output each row of the data, format line as csv and write to file pointer
while($row = $query->fetch_assoc()){
$lineData = array($row['title'], $row['description']);
fputcsv($f, $lineData, $delimiter);
}
//move back to beginning of file
fseek($f, 0);
//set headers to download file rather than displayed
header('Content-Type: text/csv');
header('Content-Disposition: attachment; filename="' . $filename . '";');
//output all remaining data on a file pointer
fpassthru($f);
}
exit;
?>
答案 0 :(得分：0)
然后整个问题是，您回显了一些html，并且其中包含download.php
echo '
<h4>Results</h4>
<table>
<tr>
<th>Title</th>
<th>Description</th>
<th>Dowload Link</th>
</tr>';
while ($row = mysqli_fetch_assoc($search_result)) {
echo '<tr>
<td>'.$row["title"].'</td>
<td>'.$row["description"].'</td>
<td><button type="submit" name="download" id="download" value="'.$row["dataset_id"].'">Dowload</button></td>
</tr>';
}
echo '</table>
';
if (isset($_POST["download"])) {
$d_id = $_POST["download"];
include 'download.php';
}
只需放置一个指向download.php的链接，而不要包含它。
echo '
<h4>Results</h4>
<table>
<tr>
<th>Title</th>
<th>Description</th>
<th>Dowload Link</th>
</tr>';
while ($row = mysqli_fetch_assoc($search_result)) {
echo '<tr>
<td>'.$row["title"].'</td>
<td>'.$row["description"].'</td>
<td><button type="submit" name="download" id="download" value="'.$row["dataset_id"].'">Dowload</button></td>
</tr>';
}
echo '</table>
';
if (isset($_POST["download"])) {
$d_id = $_POST["download"];
echo '<a href="download.php">Download File</a>';
}
如果要在将表单自动提交到download.php之后重定向用户，则可以在表单中使用属性action。
查看如何完成HTML Attribute，其中将重定向设置到页面/action_page.php。