| |
基于PHP的AJAX技术实现文件异步上传源码 |
|
时间: 2007-01-12 来自：天极yesky |
 |
|
|
源代码
＜?php
$upload_dir = "/var/www/anyexample/aeu"; //
文件存储的路径
$web_upload_dir = "/aeu"; // 文件在Web目录下的路径
$tf =
$upload_dir.'/'.md5(rand()).".test";
$f = @fopen($tf, "w");
if ($f
== false)
die("Fatal error! {$upload_dir} is not writable. Set 'chmod
777 {$upload_dir}'
or something like
this");
fclose($f);
unlink($tf);
//处理上传的文件
if
(isset($_POST['fileframe']))
{
$result = 'ERROR';
$result_msg
= 'No FILE field found';
if (isset($_FILES['file'])) //
从浏览器接受文件
{
if ($_FILES['file']['error'] == UPLOAD_ERR_OK) //
没有错误
{
$filename = $_FILES['file']['name']; // 文件名
move_uploaded_file($_FILES['file']['tmp_name'],
$upload_dir.'/'.$filename);
// 处理的主过程-转移文件到 $upload_dir
$result = 'OK';
}
elseif ($_FILES['file']['error'] ==
UPLOAD_ERR_INI_SIZE)
$result_msg = 'The uploaded file exceeds the
upload_max_filesize directive in php.ini';
else
$result_msg =
'Unknown error';
}
echo
'＜html＞＜head＞＜title＞-＜/title＞＜/head＞＜body＞';
echo '＜script
language="JavaScript" type="text/javascript"＞'."\n";
echo 'var parDoc
= window.parent.document;';
'
if ($result == 'OK')
{
echo
'parDoc.getElementById("upload_status").value = "file successfully
uploaded";';
echo 'parDoc.getElementById("filename").value =
"'.$filename.'";';
echo 'parDoc.getElementById("filenamei").value =
"'.$filename.'";';
echo
'parDoc.getElementById("upload_button").disabled =
false;';
}
else
{
echo
'parDoc.getElementById("upload_status").value = "ERROR:
'.$result_msg.'";';
}
echo
"\n".'＜/script＞＜/body＞＜/html＞';
exit();
}
function
safehtml($s)
{
$s=str_replace("&", "&",
$s);
$s=str_replace("＜", "<", $s);
$s=str_replace("＞",
">", $s);
$s=str_replace("'", "'",
$s);
$s=str_replace(""", """, $s);
return
$s;
}
if (isset($_POST['description']))
{
$filename =
$_POST['filename'];
$size =
filesize($upload_dir.'/'.$filename);
$date = date('r',
filemtime($upload_dir.'/'.$filename));
$description =
safehtml($_POST['description']);
$html
=＜＜＜END
＜html＞＜head＞＜title＞{$filename} [uploaded by IFRAME Async file
uploader]＜/title＞＜/head＞
＜body＞
＜h1＞{$filename}＜/h1＞
＜p＞This
is a file information page for your uploaded file. Bookmark it, or send to
anyone...＜/p＞
＜p＞Date: {$date}＜/p＞
＜p＞Size: {$size}
bytes＜/p＞
＜p＞Description:
＜pre＞{$description}＜/pre＞
＜/p＞
＜p＞＜a
href="{$web_upload_dir}/{$filename}" style="font-size: large;"＞download
file＜/a＞＜br＞
＜a href="{$PHP_SELF}" style="font-size: small;"＞back to
file uploading＜/a＞＜br＞
＜a href="{$web_upload_dir}/upload-log.html"
style="font-size: small;"＞upload-log＜/a＞＜/p＞
＜br＞＜br＞Example by ＜a
href="http://www.anyexample.com/"＞AnyExample＜/a＞
＜/body＞＜/html＞
END;
$f
= fopen($upload_dir.'/'.$filename.'-desc.html', "w");
fwrite($f,
$html);
fclose($f);
$msg = "File {$filename} uploaded,
＜a
href='{$web_upload_dir}/{$filename}-desc.html'＞see file information
page＜/a＞";
$f = fopen($upload_dir."/upload-log.html",
"a");
fwrite($f,
"＜p＞$msg＜/p＞\n");
fclose($f);
setcookie('msg', $msg);
header("Location: http://".$_SERVER['HTTP_HOST'].$PHP_SELF);
exit();
}
if (isset($_COOKIE['msg']) &&
$_COOKIE['msg'] != '')
{
if (get_magic_quotes_gpc())
$msg =
stripslashes($_COOKIE['msg']);
else
$msg =
$_COOKIE['msg'];
setcookie('msg', '');
}
?＞
＜!-- Beginning
of main page --＞
＜html＞＜head＞
＜title＞IFRAME Async file uploader
example＜/title＞
＜/head＞
＜body＞
＜?php
if (isset($msg))
echo '＜p style="font-weight: bold;"＞'.$msg.'＜/p＞';
?＞
＜h1＞Upload file:＜/h1＞
＜p＞File will begin to upload just after
selection. ＜/p＞
＜p＞You may write file description, while you file is
being uploaded.＜/p＞
＜form action="＜?=$PHP_SELF?＞"
target="upload_iframe" method="post"
enctype="multipart/form-data"＞
＜input type="hidden" name="fileframe"
value="true"＞
＜!-- Target of the form is set to hidden iframe
--＞
＜!-- From will send its post data to fileframe section of this PHP
script (see above) --＞
＜label for="file"＞text file
uploader:＜/label＞＜br＞
＜!-- JavaScript is called by OnChange attribute
--＞
＜input type="file" name="file" id="file"
onChange="jsUpload(this)"＞
＜/form＞
＜script
type="text/javascript"＞
/* This function is called when user selects
file in file dialog */
function jsUpload(upload_field)
{
// this
is just an example of checking file extensions
// if you do not need
extension checking, remove
// everything down to line
//
upload_field.form.submit();
var re_text =
/\.txt|\.xml|\.zip/i;
var filename = upload_field.value;
/*
Checking file type */
if (filename.search(re_text) ==
-1)
{
alert("File does not have text(txt, xml, zip)
extension");
upload_field.form.reset();
return
false;
}
upload_field.form.submit();
document.getElementById('upload_status').value
= "uploading file...";
upload_field.disabled = true;
return
true;
}
＜/script＞
＜iframe name="upload_iframe" style="width:
400px; height: 100px; display: none;"＞
＜/iframe＞
＜!-- For debugging
purposes, it's often useful to remove
"display: none" from style=""
attribute --＞
＜br＞
Upload status:＜br＞
＜input type="text"
name="upload_status" id="upload_status"
value="not uploaded" size="64"
disabled＞
＜br＞＜br＞
File name:＜br＞
＜input type="text"
name="filenamei" id="filenamei" value="none" disabled＞
＜form
action="＜?=$PHP_SELF?＞" method="POST"＞
＜!-- one field is "disabled"
for displaying-only. Other, hidden one is for sending data --＞
＜input
type="hidden" name="filename" id="filename"＞
＜br＞＜br＞
＜label
for="photo"＞File description:＜/label＞＜br＞
＜textarea rows="5" cols="50"
name="description"＞＜/textarea＞
＜br＞＜br＞
＜input type="submit"
id="upload_button" value="save file"
disabled＞
＜/form＞
＜br＞＜br＞
＜a
href="＜?=$web_upload_dir?＞/upload-log.html"＞upload-log＜/a＞
＜br＞＜br＞＜br＞
Example
by ＜a
href="http://www.anyexample.com/"＞AnyExample＜/a＞
＜/body＞
＜/html＞ |
以上的讲解就是提供一种思路供大家参考。大家也可以根据自己的需求进行相应的优化。
|
|
|
|
|
|
|
|
