第 1 页链接到第 2 页。第 2 页使用以下代码提供下载：
header("Content-disposition: attachment; filename= '$filename'");
header('Content-type: application/pdf');
readfile($file);
header("location: mainpage.php");
结果是用户“停留”在第 1 页上，但提供了下载服务。
如何进行设置，以便用户保留在第 1 页上，但在提供下载后它会刷新。
我不懂 javascript，所以我希望有一个纯粹的 PHP 解决方案。
【问题讨论】：
标签： php javascript header download refresh
在我看来，我认为您根本不需要刷新 page1。您应该能够通过 page1 中的链接强制下载。见下文：
带有链接的Page1.php
<a href="http://www.domain.com/page2.php?pdf=name-of-pdf">Download PDF</a>
Page2.php
$filename = $_GET['pdf'] . '.pdf';
header('Content-type: application/pdf');
header("Content-disposition: attachment; filename= '$filename'");
header("location: $filename");
这将允许在您停留在第 1 页时开始下载。
希望这是你的想法。
【讨论】：
以前不知道这个，但它只是很好的 HTTP 标头之一，我们大多数人已经从 HTML 中知道它：Refresh。
只需添加以下header 调用：
header('Refresh: 0; url=http://stackoverflow.com/');
【讨论】：
您可以通过 $_SERVER['HTTP_REFERER'] 来查看引用者是什么。所以你应该可以把它放在你的page1.php中：
if($_SERVER['HTTP_REFERER'] == page2.php) {
echo "<meta http-equiv=\"refresh\" content=\"0;url=http://www.yourdomain.com/page1.php\">";
exit();
}
这样，您可以检查您的访问者是否来自 page2.php，如果是，您只需解析一个刷新浏览器的元标记。当它刷新时，它不会再次刷新，因为 HTTP_REFERER 现在是 page1.php。
【讨论】：
不知道你是否得到了这个答案，但我遇到了同样的问题， 这是我的解决方案 AJAX jquery
$(function(){
$("#itemList").on("click", "a.downloadLink", function(){ //this binds a click event handler on the itemList container that will listen out for any a with class of downloadLink inside it being clicked
var link = $(this);
var item = link.parent();
var forId = item.data("itemid");
var started = new Date(); //the alternative to tracking time elapsed is to just use a simple counter you increment - "poll 5 times" etc. if your doing .5 second intervals, then 5 times = 2.5 seconds for example. Time elapsed may result in less polls, if a poll takes a long time to return, for example. Use whichever approach feels better.
var maxTime = 5000; //5 seconds
function poll(){
$.ajax({
type: "POST",
url: "Watergetstatus.php",
data: {FID: forId}, //this will be turned into a request for page1?forId=1&oldValue=2 - I expect it in this example to return a json-encoded response of {"changed":true|false, "newHtml":"replacementContent on success"}
datatype :'json',
success: function(data){
if (data.changed=true)
{
window.location.reload(true);
}
else {
var elapsed = (new Date())-started;
//window.location.reload(true);
if (elapsed <= maxTime) setTimeout(poll, 500); // Poll again in .5 seconds
//else you can assume the link didn't open / work / the database never changed etc - handle or ignore as needed
}
},
error: function() {
alert("borken"); //the request to the server bombed out; up to you if you want to simply re-queue for another try like above until the expiry time or if you want to show an error or just simply ignore it.
}
});
}
setTimeout(poll, 500); //wait 0.5 seconds before polling
});
});
HTML 包含大量动态链接
<div data-itemid="<?php echo $row_Files['FID']; ?> " >
<a class="downloadLink" href="PLC_FILES/WaterCheckOut.php?FID=<?php echo $row_Files['FID']; ?> " target=""><img src="PLCImages/download.fw.png"></a>
</div>
Poling 文件 watergetstatus.php
mysql_select_db($database_PLC, $PLC);
$query_files = "SELECT * FROM files WHERE FID = '{$_POST['FID']}'";
$files = mysql_query($query_files, $PLC) or die(mysql_error());
$row_files = mysql_fetch_assoc($files);
$totalRows_files = mysql_num_rows($files);
if($row_files['Status'] ==2)
{
$data= array("changed"=>true);
echo json_encode($data);
}
else
{
$data= array("changed"=>false);
echo json_encode($data);
}
下载文件链接watercheckout.php
if ( $row_files['Status']==1 ) {
$file_path = $row_files['FileName'];;
$path_parts = pathinfo($file_path);
$file_name = $path_parts['basename'];
$file_ext = $path_parts['extension'];
$content_types = array(
"exe" => "application/octet-stream",
"zip" => "application/zip",
"mp3" => "audio/mpeg",
"mpg" => "video/mpeg",
"avi" => "video/x-msvideo",
);
$ctype = isset($content_types[$file_ext]) ? $content_types[$file_ext] : $ctype_default;
$file = $row_files['FileName'];
$path = "Historical/".date('Y-m-d-His');
$newfile = $path."_".$file;
$today = date('Y-m-d H:i:s');
header('Content-disposition: attachment; filename='.$file);
header("Content-Type: " . $ctype);
header('Content-Length: ' . filesize($file));
header('Content-Transfer-Encoding: binary');
header('Cache-Control: must-revalidate');
header('Pragma: public');
mysql_select_db($database_PLC, $PLC);
mysql_query("UPDATE files SET Status = '2'");
ob_clean();
flush();
readfile($file);
rename($file, $newfile);
我已经简化了我的代码并删减了很多，所以它可能会遗漏一些东西，但这是我使用的通用框架，它适用于我
希望这对某人有所帮助，因为那里没有太多内容
【讨论】：
//----------------- TOP OF DOWNLOAD_PAGE.PHP ----------------------
$download_code = mysql_real_escape_string(urldecode($_GET['code']));
$download = mysql_real_escape_string(urldecode($_GET['download']));
$self = $_SERVER["PHP_SELF"]."?code=$download_code";
//refresh page after download...
echo"
<script type=\"text/javascript\">
function downloadRedirect(){
var redirect_url = \"$self\";
setTimeout(\"DoTheRedirect('\"+redirect_url+\"')\",
parseInt(0.5*1000));
}
function DoTheRedirect(url) { window.location=url; }
</script>
";
...
$filepath = "/var/www/vhosts/YOUR_DOMAIN.com/digital_downloads/";
if (isset($_GET['download'])) {
$file = $_GET['download'];
if (file_exists($filepath.$download) &&
is_readable($filepath.$download) && (preg_match('/\.zip$/',$download) || preg_match('/\.zipx$/',$download) )) {
...
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: public");
header("Content-Description: File Transfer");
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"".$download."\"");
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize($filepath.$download));
ob_end_flush();
readfile($filepath.$download);
}//end if file_exists
}//end if isset
//----------------- BOTTOM HALF OF DOWNLOAD_PAGE.PHP ----------------------
//link generated to download and call JS to refresh page
echo "<a href=\"".$_SERVER["PHP_SELF"]."?download=$download_id.zipx&code=$download_code\" target=\"_top\" onclick=\"javascript:downloadRedirect()\">Click to Download</a>
【讨论】：