Was*_* A. 19 javascript php ajax upload progress-bar
<form enctype="multipart/form-data" action="upload.php" method="POST">
<input name="uploaded" type="file" />
<input type="submit" value="Upload" />
</form>
<?php
if(isset($_REQUEST['submit'])){
$target = "data/".basename( $_FILES['uploaded']['name']) ;
move_uploaded_file($_FILES['uploaded']['tmp_name'], $target);
}
?>
Run Code Online (Sandbox Code Playgroud)
我非常了解Javascript,AJAX和JQuery等,我相信可以使用PHP,AJAX和Javascript等创建上传进度条.
我很惊讶如何在上传过程中获取上传的大小(意味着我想知道的每一秒,上传了多少文件以及剩余多少,我认为应该可以使用AJAX等)文件.
这是PHP手册的链接,但我不明白:http: //php.net/manual/en/session.upload-progress.php
有没有其他方法使用PHP和AJAX显示上传进度条但不使用PHP的任何外部扩展?我无权访问php.ini
Bab*_*aba 37
它说,PHP Doc非常详细
当上载正在进行时,以及当将session.upload_progress.name INI设置的同名变量设置为POST时,上传进度将在$ _SESSION超全局中可用.当PHP检测到此类POST请求时,它将填充$ _SESSION中的数组,其中索引是session.upload_progress.prefix和session.upload_progress.name INI选项的连接值.通常通过读取这些INI设置来检索密钥,即
您需要的所有信息都已准备好在PHP会话命名中
您只需要提取此信息并将其显示在HTML表单中即可.
<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css"
rel="stylesheet" type="text/css" />
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<script type="text/javascript">
var intval = null;
var percentage = 0 ;
function startMonitor() {
$.getJSON('b.php',
function (data) {
if (data) {
percentage = Math.round((data.bytes_processed / data.content_length) * 100);
$("#progressbar").progressbar({value: percentage});
$('#progress-txt').html('Uploading ' + percentage + '%');
}
if(!data || percentage == 100){
$('#progress-txt').html('Complete');
stopInterval();
}
});
}
function startInterval() {
if (intval == null) {
intval = window.setInterval(function () {startMonitor()}, 200)
} else {
stopInterval()
}
}
function stopInterval() {
if (intval != null) {
window.clearInterval(intval)
intval = null;
$("#progressbar").hide();
$('#progress-txt').html('Complete');
}
}
startInterval();
</script>
Run Code Online (Sandbox Code Playgroud)
session_start();
header('Content-type: application/json');
echo json_encode($_SESSION["upload_progress_upload"]);
Run Code Online (Sandbox Code Playgroud)
这是PHP Session Upload Progress中更好的优化版本
$('#fileupload').bind('fileuploadsend', function (e, data) {
// This feature is only useful for browsers which rely on the iframe transport:
if (data.dataType.substr(0, 6) === 'iframe') {
// Set PHP's session.upload_progress.name value:
var progressObj = {
name: 'PHP_SESSION_UPLOAD_PROGRESS',
value: (new Date()).getTime() // pseudo unique ID
};
data.formData.push(progressObj);
// Start the progress polling:
data.context.data('interval', setInterval(function () {
$.get('progress.php', $.param([progressObj]), function (result) {
// Trigger a fileupload progress event,
// using the result as progress data:
e = document.createEvent('Event');
e.initEvent('progress', false, true);
$.extend(e, result);
$('#fileupload').data('fileupload')._onProgress(e, data);
}, 'json');
}, 1000)); // poll every second
}
}).bind('fileuploadalways', function (e, data) {
clearInterval(data.context.data('interval'));
});
Run Code Online (Sandbox Code Playgroud)
$s = $_SESSION['upload_progress_'.intval($_GET['PHP_SESSION_UPLOAD_PROGRESS'])];
$progress = array(
'lengthComputable' => true,
'loaded' => $s['bytes_processed'],
'total' => $s['content_length']
);
echo json_encode($progress);
Run Code Online (Sandbox Code Playgroud)
归档时间: |
|
查看次数: |
19694 次 |
最近记录: |