PHP AJAXFORM提交图片上传并显示图片源代码

<?

php
$file_upload = "upload/";
$file_allow_ext='gif|jpg|jpeg|png|gif|zip|rar|ppt|xls|pdf|pptx|xlsx|docx';
$file_allow_size = 5*1024*1024;
if($_POST['submit']=="上传"){
if(is_uploaded_file($_FILES['file']['tmp_name'])){
$file_name  = $_FILES['file']['name'];
$file_error = $_FILES['file']['error'];
$file_type  = $_FILES['file']['type'];
$file_tmp_name	 = $_FILES['file']['tmp_name'];
$file_size  = $_FILES['file']['size'];
$file_ext   = substr($file_name, strrpos($file_name, '.')+1);
switch($file_error){
case 0:
$data['status'] = 0;
$data['msg']   = "文件上传成功!";
break;

case 1:
$data['status'] = 1;
$data['msg']	= "文件上传失败，文件大小".$file_size."超过限制,同意上传大小".sizeFormat($file_allow_size)."!";
break;

case 3:
$data['status'] = 1;
$data['msg']   = "上传失败，文件仅仅有部份上传!";
break;

case 4:
$data['status'] = 1;
$data['msg']   = "上传失败，文件没有被上传!";
break;

case 5:
$data['status'] = 1;
$data['msg']   = "文件上传失败，文件大小为0!";
break;
}
if(stripos($file_allow_ext,$file_ext)===false){
$data['status'] = 1;
$data['msg'] = "该文件扩展名不同意上传";
}
if($file_size>$file_allow_size){
$data['status'] = 1;
$data['msg']	= "文件大小超过限制,仅仅能上传".sizeFormat($file_allow_size)."的文件!";
}
if($data['status']==1){
$data['status'] = 1;
$data['msg'] = $data['msg'];
exit(json_encode($data));
}
if($data['status']==0){
if(file_exists($file_upload)){
$file_new_name = date("YmdHis").'_'.rand(10000,99999).'.'.$file_ext;
$file_save_path = $file_upload.$file_new_name;
$data['status'] = 0;
$data['url'] = $file_save_path;
move_uploaded_file($file_tmp_name,$file_save_path);
exit(json_encode($data));
}else{
exit(json_encode($data));
}

}
}
}

function sizeFormat($size)
{
$sizeStr='';
if($size<1024)
{
return $size."bytes";
}
else if($size<(1024*1024))
{
$size=round($size/1024,1);
return $size."KB";
}
else if($size<(1024*1024*1024))
{
$size=round($size/(1024*1024),1);
return $size."MB";
}
else
{
$size=round($size/(1024*1024*1024),1);
return $size."GB";
}
}

?>

<script type="text/javascript" src="http://lib.sinaapp.com/js/jquery/1.9.1/jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="http://files.cnblogs.com/files/china-li/jquery.form.js"></script>

<form action="dofile.php" method="post" enctype="multipart/form-data" id="upfileimage">
<input type="hidden" name="image[]"  />
<label for="file">文件:</label><input type="file" name="file" id="file" />
<input type="submit" name="submit" value="上传" />
</form>

<script type="text/javascript">
$("#upfileimage").submit(function(){
if($("input[type=file]").val()==""){
alert("请选择要上传的文件");
return false;
}
})
$(function(){
var options = {
type:"POST",
dataType:"json",
resetForm:true,
success:function(o){
if(o.status==1){
alert(o.msg);
}else{
$("body").append("  <img src='"+o.url+"' alt='' width='100' /><input type='hidden' name='image[]' value='"+o.url+"'  />");
}
},
error:function(o){
alert(o.message);
}
}
$("#upfileimage").ajaxForm(options).submit(function(){return false;});

})
</script>