我已经给出了演示链接
http://exposureroom.biz/upload.aspx 这里我在我的网站上实现了ajax文件上传进程条，所以在这里我要添加删除按钮以删除上传的文件。
js file：
// common variables
var iBytesUploaded = 0;
var iBytesTotal = 0;
var iPreviousBytesLoaded = 0;
var iMaxFilesize = 1048576; // 1MB
var oTimer = 0;
var sResultFileSize = '';
function secondsToTime(secs) { // we will use this function to convert seconds in normal time format
var hr = Math.floor(secs / 3600);
var min = Math.floor((secs - (hr * 3600))/60);
var sec = Math.floor(secs - (hr * 3600) - (min * 60));
if (hr < 10) {hr = "0" + hr; }
if (min < 10) {min = "0" + min;}
if (sec < 10) {sec = "0" + sec;}
if (hr) {hr = "00";}
return hr + ':' + min + ':' + sec;
};
function bytesToSize(bytes) {
var sizes = ['Bytes', 'KB', 'MB'];
if (bytes == 0) return 'n/a';
var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
return (bytes / Math.pow(1024, i)).toFixed(1) + ' ' + sizes[i];
};
function fileSelected() {
// hide different warnings
document.getElementById('upload_response').style.display = 'none';
document.getElementById('error').style.display = 'none';
document.getElementById('error2').style.display = 'none';
document.getElementById('abort').style.display = 'none';
document.getElementById('warnsize').style.display = 'none';
// get selected file element
var oFile = document.getElementById('image_file').files[0];
// filter for image files
var rFilter = /^(image\/bmp|image\/gif|image\/jpeg|image\/png|image\/tiff)$/i;
if (! rFilter.test(oFile.type)) {
document.getElementById('error').style.display = 'block';
return;
}
// little test for filesize
if (oFile.size > iMaxFilesize) {
document.getElementById('warnsize').style.display = 'block';
return;
}
// get preview element
var oImage = document.getElementById('preview');
// prepare HTML5 FileReader
var oReader = new FileReader();
oReader.onload = function(e){
// e.target.result contains the DataURL which we will use as a source of the image
oImage.src = e.target.result;
oImage.onload = function () { // binding onload event
// we are going to display some custom image information here
sResultFileSize = bytesToSize(oFile.size);
document.getElementById('fileinfo').style.display = 'block';
document.getElementById('filename').innerHTML = 'Name: ' + oFile.name;
document.getElementById('filesize').innerHTML = 'Size: ' + sResultFileSize;
document.getElementById('filetype').innerHTML = 'Type: ' + oFile.type;
document.getElementById('filedim').innerHTML = 'Dimension: ' + oImage.naturalWidth + ' x ' + oImage.naturalHeight;
};
};
// read selected file as DataURL
oReader.readAsDataURL(oFile);
}
function startUploading() {
// cleanup all temp states
iPreviousBytesLoaded = 0;
document.getElementById('upload_response').style.display = 'none';
document.getElementById('error').style.display = 'none';
document.getElementById('error2').style.display = 'none';
document.getElementById('abort').style.display = 'none';
document.getElementById('warnsize').style.display = 'none';
document.getElementById('progress_percent').innerHTML = '';
var oProgress = document.getElementById('progress');
oProgress.style.display = 'block';
oProgress.style.width = '0px';
// get form data for POSTing
//var vFD = document.getElementById('upload_form').getFormData(); // for FF3
var vFD = new FormData(document.getElementById('upload_form'));
// create XMLHttpRequest object, adding few event listeners, and POSTing our data
var oXHR = new XMLHttpRequest();
oXHR.upload.addEventListener('progress', uploadProgress, false);
oXHR.addEventListener('load', uploadFinish, false);
oXHR.addEventListener('error', uploadError, false);
oXHR.addEventListener('abort', uploadAbort, false);
oXHR.open('POST', 'upload.php');
oXHR.send(vFD);
// set inner timer
oTimer = setInterval(doInnerUpdates, 300);
}
function doInnerUpdates() { // we will use this function to display upload speed
var iCB = iBytesUploaded;
var iDiff = iCB - iPreviousBytesLoaded;
// if nothing new loaded - exit
if (iDiff == 0)
return;
iPreviousBytesLoaded = iCB;
iDiff = iDiff * 2;
var iBytesRem = iBytesTotal - iPreviousBytesLoaded;
var secondsRemaining = iBytesRem / iDiff;
// update speed info
var iSpeed = iDiff.toString() + 'B/s';
if (iDiff > 1024 * 1024) {
iSpeed = (Math.round(iDiff * 100/(1024*1024))/100).toString() + 'MB/s';
} else if (iDiff > 1024) {
iSpeed = (Math.round(iDiff * 100/1024)/100).toString() + 'KB/s';
}
document.getElementById('speed').innerHTML = iSpeed;
document.getElementById('remaining').innerHTML = '| ' + secondsToTime(secondsRemaining);
}
function uploadProgress(e) { // upload process in progress
if (e.lengthComputable) {
iBytesUploaded = e.loaded;
iBytesTotal = e.total;
var iPercentComplete = Math.round(e.loaded * 100 / e.total);
var iBytesTransfered = bytesToSize(iBytesUploaded);
document.getElementById('progress_percent').innerHTML = iPercentComplete.toString() + '%';
document.getElementById('progress').style.width = (iPercentComplete * 4).toString() + 'px';
document.getElementById('b_transfered').innerHTML = iBytesTransfered;
if (iPercentComplete == 100) {
var oUploadResponse = document.getElementById('upload_response');
oUploadResponse.innerHTML = '<h1>Please wait...processing</h1>';
oUploadResponse.style.display = 'block';
}
} else {
document.getElementById('progress').innerHTML = 'unable to compute';
}
}
function uploadFinish(e) { // upload successfully finished
var oUploadResponse = document.getElementById('upload_response');
oUploadResponse.innerHTML = e.target.responseText;
oUploadResponse.style.display = 'block';
document.getElementById('progress_percent').innerHTML = '100%';
document.getElementById('progress').style.width = '400px';
document.getElementById('filesize').innerHTML = sResultFileSize;
document.getElementById('remaining').innerHTML = '| 00:00:00';
clearInterval(oTimer);
}
function uploadError(e) { // upload error
document.getElementById('error2').style.display = 'block';
clearInterval(oTimer);
}
function uploadAbort(e) { // upload abort
document.getElementById('abort').style.display = 'block';
clearInterval(oTimer);
}
html文件：
<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="utf-8" />
<title>Pure HTML5 file upload | Script Tutorials</title>
<link href="css/main.css" rel="stylesheet" type="text/css" />
<script src="js/script.js"></script>
</head>
<body>
<header>
<h2>Pure HTML5 file upload</h2>
<a href="http://www.script-tutorials.com/pure-html5-file-upload/" class="stuts">Back to original tutorial on <span>Script Tutorials</span></a>
</header>
<div class="container">
<div class="contr"><h2>You can select the file (image) and click Upload button</h2></div>
<div class="upload_form_cont">
<form id="upload_form" enctype="multipart/form-data" method="post" action="upload.php">
<div>
<div><label for="image_file">Please select image file</label></div>
<div><input type="file" name="image_file" id="image_file" onchange="fileSelected();" /></div>
</div>
<div>
<input type="button" value="Upload" onclick="startUploading()" />
</div>
<div id="fileinfo">
<div id="filename"></div>
<div id="filesize"></div>
<div id="filetype"></div>
<div id="filedim"></div>
</div>
<div id="error">You should select valid image files only!</div>
<div id="error2">An error occurred while uploading the file</div>
<div id="abort">The upload has been canceled by the user or the browser dropped the connection</div>
<div id="warnsize">Your file is very big. We can't accept it. Please select more small file</div>
<div id="progress_info">
<div id="progress"></div>
<div id="progress_percent"> </div>
<div class="clear_both"></div>
<div>
<div id="speed"> </div>
<div id="remaining"> </div>
<div id="b_transfered"> </div>
<div class="clear_both"></div>
</div>
<div id="upload_response"></div>
</div>
</form>
<img id="preview" />
</div>
</div>
</body>
</html>
upload.php的
<?php
if($_FILES["image_file"]){
$uploads_dir = 'files/';
$sFileName = $_FILES['file_name']['name'];
$sFileType = $_FILES['file_name']['type'];
function bytesToSize1024($bytes, $precision = 2) {
$unit = array('B','KB','MB');
return @round($bytes / pow(1024, ($i = floor(log($bytes, 1024)))), $precision).' '.$unit[$i];
}
move_uploaded_file($_FILES['file_name']['tmp_name'], "$uploads_dir/$sFileName");
exit;
}
?>
答案 0 :(得分：0)
将PHP脚本更改为
<?php
function bytesToSize1024($bytes, $precision = 2) {
$unit = array('B','KB','MB');
return @round($bytes / pow(1024, ($i = floor(log($bytes, 1024)))), $precision).' '.$unit[$i];
}
$uploads_dir = 'files/';
$sFileName = $_FILES['image_file']['name'];
$sFileType = $_FILES['image_file']['type'];
$sFileSize = bytesToSize1024($_FILES['image_file']['size'], 1);
move_uploaded_file($_FILES['image_file']['tmp_name'],$uploads_dir.$sFileName);
echo <<<EOF
<p>Your file: {$sFileName} has been successfully received.</p>
<p>Type: {$sFileType}</p>
<p>Size: {$sFileSize}</p>
EOF;
?>
创建一个删除上传文件的文件
<?php
unlink($_POST['filename']);
echo 'Deleted';
?>
添加另一个文件以显示您上传的文件，您可以根据需要进行更改
<script type="text/javascript" src="js/jquery.min.js"></script>
<script>
function deleteFile(file) {
$('#delFile').hide();
var order = 'filename='+file;
$.post("delfilephp.php", order, function(response,status, xhr){
if (status == "success") {
alert(response);
}
else if (status == "error") {
alert('Something went wrong, we are working to fix it');
}
});
}
</script>
<div id="delFile">
<?php
//path to directory to scan
$directory = "files/";
//get all image files with a .jpg extension.
$images = glob($directory . "*.*");
//print each file name
foreach($images as $image)
{
echo '<pre>';
echo $image;
?>
<a href="javascript:;" onclick="deleteFile('<?php echo $image; ?>')">Delete File</a>
<?php
}
?>
</div>