使用js實現ajax，PHP上傳圖片成功以後返回圖片的路徑（彈窗出來）。
代碼資源下載地址：http://download.csdn.net/detail/u014175572/9481351
效果如下：
1、上傳界面：
2、上傳成功以後
3、後臺接收到的文件
代碼很簡單：
1、html與js部分：
<!DOCTYPE html>
<html>
<head>
<title>Html5 Ajax 上傳文件</title>
<meta charset="utf-8">
<script type="text/javascript">
var xhr;
function createXMLHttpRequest() {
if (window.ActiveXObject) {
xhr = new ActiveXObject("Microsoft.XMLHTTP");
} else if (window.XMLHttpRequest) {
xhr = new XMLHttpRequest();
}
}
function UpladFile() {
var fileObj = document.getElementById("file").files[0];
var FileController = 'doajaxfileupload.php';
var form = new FormData();
form.append("myfile", fileObj);
createXMLHttpRequest();
xhr.onreadystatechange = handleStateChange;
xhr.open("post", FileController, true);
xhr.send(form);
}
function handleStateChange() {
if (xhr.readyState == 4) {
if (xhr.status == 200 || xhr.status == 0) {
var result = xhr.responseText;
var json = eval("(" + result + ")");
alert('圖片鏈接:\n' + json.file);
}
}
}
</script>
<!--<style>
.txt{ height:28px; border:1px solid #cdcdcd; width:670px;}
.mybtn{ background-color:#FFF; line-height:14px;vertical-align:middle;border:1px solid #CDCDCD;height:30px; width:70px;}
.file{ position:absolute; top:0; right:80px; height:24px; filter:alpha(opacity:0);opacity: 0;width:260px }
</style>-->
</head>
<body>
<div class="form-group">
<label class="control-label">圖片</label>
<br/>
<input type='text' name='textfield' id='textfield' class='txt' />
<span οnclick="file.click()" class="mybtn">瀏覽...</span>
<input type="file" name="file" class="file" id="file" size="28" οnchange="document.getElementById('textfield').value=this.value" />
<span οnclick="UpladFile()" class="mybtn">上傳</span>
</div>
</body>
</html>
<?php
if(isset($_FILES["myfile"]))
{
$ret = array();
//$uploadDir = 'images'.DIRECTORY_SEPARATOR.date("Ymd").DIRECTORY_SEPARATOR;
$uploadDir = 'uploads'.DIRECTORY_SEPARATOR;
$dir = dirname(__FILE__).DIRECTORY_SEPARATOR.$uploadDir;
file_exists($dir) || (mkdir($dir,0777,true) && chmod($dir,0777));
if(!is_array($_FILES["myfile"]["name"])) //single file
{
//$fileName = time().uniqid().'.'.pathinfo($_FILES["myfile"]["name"])['extension'];
$fileName = $_FILES["myfile"]["name"];
move_uploaded_file($_FILES["myfile"]["tmp_name"],$dir.$fileName);
$ret['file'] = DIRECTORY_SEPARATOR.$uploadDir.$fileName;
}
echo json_encode($ret);
}
?>代碼資源下載地址：http://download.csdn.net/detail/u014175572/9481351
