php利用iframe实现无刷新文件上传功能的代码

作者：bea

代码如下:

<html>

　<head>

　<title>无刷新上传文件</title>

　<meta Content-type="text/html" charset="utf-8" />

　<script type="text/网页特效">

　function startUpload() {

　document.getElementById('processing').innerHTML = 'loding...';

　return true;

　}

　function stopUpload(rel){

　var msg;

　switch (rel) {

　case 0:

　msg = "上传成功";

　break;

　case 1:

　msg = "上传的文件超过限制";

　break;

　case 2:

　msg = "只能上传图片文件";

　break;

　default:

　msg = "上传文件失败";

　}

　document.getElementById('processing').innerHTML = msg;

　}

　</script>

　</head>

　<body>

　<div style="text-align:center">

　<div id="processing"></div>

　<form action="upload.php教程" method="post" enctype="multipart/form-data" target="form-target" onsubmit="startUpload();">

　<input type="hidden" name="MAX_FILE_SIZE" value="1000000" />

　<input type="file" name="myfile" />

　<input type="submit" name="sub" value="upload" />

　</form>

　<iframe style="width:0; height:0; border:0;" name="form-target"></iframe>

　</div>

　</body>

　</html>

　php代码

　<?php

　sleep(2);

　$fileTypes = array('jpg','png','gif','bmp');

　$result = null;

　$uploadDir = './upfiles';

　$maxSize = 1 * pow(2,20);

　if ($_SERVER['REQUEST_METHOD'] == 'POST' && isset($_POST['sub'])) {

　$myfile = $_FILES['myfile'];

　$myfileType = substr($myfile['name'], strrpos($myfile['name'], ".") + 1);

　if ($myfile['size'] > $maxSize) {

　$result = 1;

　} else if (!in_array($myfileType, $fileTypes)) {

　$result = 2;

　} elseif (is_uploaded_file($myfile['tmp_name'])) {

　$toFile = $uploadDir . '/' . $myfile['name'];

　if (@move_uploaded_file($myfile['tmp_name'], $toFile)) {

　$result = 0;

　} else {

　$result = -1;

　}

　} else {

　$result = 1;

　}

　}

　?>

　<script type="text/javascript">

　window.top.window.stopUpload(<?php echo $result; ?>);

　</script>

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php利用iframe实现无刷新文件上传功能的代码

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