Im使用脚本来输出上传的图像预览。它运行良好。我只想在一个div中显示图像,在另一个div显示错误或成功消息。有机会这样做吗?这是代码。
Java脚本
<script type="text/javascript">
$(document).ready(function(){
$('#photoimg').live('change', function(){
$("#preview").html('');
$("#preview").html('<img src="loader.gif" alt="Uploading...."/>');
$("#imageform").ajaxForm(
{
target: '#preview'
}).submit();
});
});
</script>
HTML代码
<?php
include('db.php');
session_start();
$session_id='1'; // User login session value
?>
<div id="output"></div>
<form id="imageform" method="post" enctype="multipart/form-data" action='ajaximage.php'>
Upload image <input type="file" name="photoimg" id="photoimg" />
</form>
<div id='preview'>
</div>
PHP代码
include('db.php');
session_start();
$session_id='1'; // User session id
$path = "uploads/";
$valid_formats = array("jpg", "png", "gif", "bmp","jpeg");
if(isset($_POST) and $_SERVER['REQUEST_METHOD'] == "POST")
{
$name = $_FILES['photoimg']['name'];
$size = $_FILES['photoimg']['size'];
if(strlen($name))
{
list($txt, $ext) = explode(".", $name);
if(in_array($ext,$valid_formats))
{
if($size<(1024*1024)) // Image size max 1 MB
{
$actual_image_name = time().$session_id.".".$ext;
$tmp = $_FILES['photoimg']['tmp_name'];
if(move_uploaded_file($tmp, $path.$actual_image_name))
{
mysql_query("UPDATE users SET profile_image='$actual_image_name' WHERE uid='$session_id'");
echo "<img src='uploads/".$actual_image_name."' class='preview'>";
echo "<span class=ok-msg">Image has been uploaded..!</span>";
}
else
echo "<span class=error-msg">failed<span>";
}
else
echo "<span class=error-msg">Image file size max 1 MB</span>";
}
else
echo "<span class=error-msg">Invalid file format..</span>";
}
else
echo "<span class=error-msg">Please select image..!</span>";
exit;
}
我喜欢在div输出和图像的同一位置显示所有的按摩(error msg,ok msg)和div预览。有人能告诉我怎么做吗。提前谢谢。
使用类似json dataType
和success callback function
的
$("#imageform").ajaxForm(
{
dataType:'json',
success:function(json){
$('#output').html(json.img);
$('#preview').html(json.msg);
}
}).submit();
在PHP中
返回数据,如
echo json_encode(array('img'=>"<img src='...' />",'msg'=>"Message goes here"));
return;
您可以使用-成功和错误:eventListner
$("#imageform").ajaxForm(
{
dataType:'json',
success:function(json){
write the success msg
}
error: function() {
write the error msg
}
}).submit();