PHP AJAXFORM提交图片上传并显示图片源代码

PHP dofile.php 文件上传源代码

<?

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";
    }
}

?>

HTML例如以下

<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("&nbsp;&nbsp;<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>