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Example of how php and ajaxForm implement asynchronous file upload with progress bar

黄舟
黄舟Original
2017-08-13 09:10:142068browse

Before using the ajaxForm method, you first need to install the form.js plug-in, which is available online;

1. First, let’s talk about usage. AjaxForm can receive 0 or 1 parameter, which can be a variable, a Object or callback function. This object mainly has the following parameters: 

var object= {
                     url:url,　　　　　　//form提交数据的地址
　　　　　　  type:type,　　　  //form提交的方式(method:post/get)
　　　　　　  target:target,　　//服务器返回的响应数据显示的元素(Id)号
                      beforeSerialize:function(){} //序列化提交数据之前的回调函数
　　　　　　  beforeSubmit:function(){},　　//提交前执行的回调函数
　　　　　　  success:function(){},　　　　   //提交成功后执行的回调函数
                      error:function(){},             //提交失败执行的函数
　　　　　　  dataType:null,　　　　　　　//服务器返回数据类型
　　　　　　  clearForm:true,　　　　　　 //提交成功后是否清空表单中的字段值
　　　　　　  restForm:true,　　　　　　  //提交成功后是否重置表单中的字段值，即恢复到页面加载时的状态
　　　　　　  timeout:6000 　　　　　 　 //设置请求时间，超过该时间后，自动退出请求，单位(毫秒)。　　
}
ajaxForm js的code


$(function(){
   $("form").ajaxForm(object)；
})

Instance specific code code

htmlcode


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="X-UA-Compatible" content="IE=7" /><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta name="ROBOTS" content="NOODP"><title>PHP+Ajax异步带进度条上传文件实例_php</title><meta http-equiv="X-UA-Compatible" content="IE=EDGE" /><meta name="keywords" content="php,ajax异步上传文件,ajax,异步加载,进度条,php,ajax上传进度条" /><meta name="description" content="这篇文章主要介绍了PHP+Ajax异步带进度条上传文件实例代码。" /><!--默认的进度条样式文件
添加一个带有 class .progress 的 <p>。
接着，在上面的 <p> 内，添加一个带有 class .progress-bar 的空的 <p>。
添加一个带有百分比表示的宽度的 style 属性，例如 style="60%"; 表示进度条在 60% 的位置--><link rel="stylesheet" href="public/css/bootstrap.min.css"> <script src="public/js/jquery.min.js"></script><script src="public/js/jquery.form.js"></script> <!--ajaxForm 提交form表单数据无刷新处理数据--></head><body><p class="uk-container uk-container-center">
    <p class="pk-system-messages"></p>
    <h1 class="uk-h2 uk-text-center" style="margin-top:-100px;">文件上传</h1>
    <p class="pk-system-messages"></p>
    <p class="container-main">
        <h1>文件上传</h1>
        <p>这里只是一个ajax+php+ajaxForm上传文件word文档例子</p>
        <form id=&#39;myupload&#39; action=&#39;upload.php&#39; method=&#39;post&#39; enctype=&#39;multipart/form-data&#39;>
            <label for="file">选择上传文件名:</label>
            <input type="file" name="mypic" id="file"><br>
            <input type="submit" name="upload" class="btn btn-success" value="upload">
            <input type=&#39;text&#39; name="list" value="555"/>
        </form>
        <p class="progress">
            <p class="progress-bar progress-bar-success progress-bar-striped" role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100" style="width: 0%;color:red;">
                   <span class="sr-only">10% Complete</span>
           </p>
        </p>
       <p class="files"></p>
       <p class="showimg"></p>     </p>          </p></body><script type="text/javascript">$(function () {
   $("#myupload").ajaxForm({
     dataType:&#39;json&#39;,
     beforeSend:function(){ 
         $(".progress").show();
     },
     uploadProgress:function(event,position,total,percentComplete){
         var percentVal = percentComplete + &#39;%&#39;;
         $(".progress-bar").width(percentComplete + &#39;%&#39;);
         $(".progress-bar").html(percentVal);
         $(".sr-only").html(percentComplete + &#39;%&#39;);
     },
     success:function(data){
         $(".progress").hide();
       
         if(data.error == "empty_name"){
             alert("文件上传非法,上传失败!");
             exit();
         };
         if(data.error == "large"){
             alert("图片上传不能大于2M,上传失败!");
             exit();
         };
   
         if(data.error == "format"){
             alert("图片格式错误,上传失败");
             exit();
         };
   
         //$(".files").html("<b>"+data.name+"("+data.size+"k)</b> <span class=&#39;delimg&#39; rel=&#39;"+data.pic+"&#39;>删除</span>");         $(".files").html("文件名: "+data.name+"<span class=&#39;delimg&#39; rel=&#39;"+data.pic+"&#39;>  del  </span>大小："+data.size);
         var img = "files/"+data.pic;
         $(".showimg").html("<img src=&#39;"+img+"&#39;>");
         alert("上传成功!");
     },
     error:function(){
         alert("上传失败");
     }
       
   });
   $(".progress").hide();
});</script></html>

php upload upload class upload.class.php file


<?php
date_default_timezone_set("PRC"); //设置时间区域
//上传类class upload{  protected $file_path = "files"; //当前files存储文件夹
  protected $file_size = 5120000; //5M 用户上传
 /**
  *检测文件是否为空  */
 public function check_file($get_file)
 {    if (empty($get_file))
    {        $type = "check_file";        $arr = array(&#39;error&#39;=>&#39;empty_name&#39;,&#39;type&#39;=>$type);        echo json_encode($arr);        exit();
    }  return true;
 } /**
  *检测文件类型  */
 public function check_type($get_type)
 {   if (( $get_type == ".docx" ) || ( $get_type == ".doc" )) {      //这里只是判断上传word文档可以自己添加
   }else{      $type = "check_type";      $arr = array(&#39;error&#39;=>&#39;format&#39;,&#39;type&#39;=>$type);        echo json_encode($arr);        exit(); 
  
   }  return true;
 } /**
  *检测文件大小  */
 public function check_size($get_file)
 {   if ( $get_file != "" ) {      if ( $get_file > $this->file_size ) {          $arr = array(&#39;error&#39;=>&#39;large&#39;);          echo json_encode($arr);          exit();
      }
  }else{    return false;    exit();
  } return true;
 } /**
  *文件保存  */
 public function save_file($file_type,$file_tmp_name)
 {  $rand = rand(1000, 9999);  $pics =date(&#39;YmdHis&#39;) . $rand . $file_type;  $path = $this->file_path."/".$pics;  $result = move_uploaded_file($file_tmp_name, $path);  if($result){    return $pics;
  }else{    return false;    exit();
  }
 }
}?>

ajax submit php processing file upload.php


<?phpinclude("upload.class.php");$up_obj = new upload();//获取上传文件名$get_fileName = $_FILES[&#39;mypic&#39;][&#39;name&#39;]; 
$get_fileSize = $_FILES[&#39;mypic&#39;][&#39;size&#39;];$get_TmpFiles = $_FILES[&#39;mypic&#39;][&#39;tmp_name&#39;];$get_fileType = strstr($get_fileName, &#39;.&#39;);$check_result = $up_obj->check_file($get_fileName);if($check_result){  $result_type = $up_obj->check_type($get_fileType);//检查文件类型
  if($result_type){    $result_size = $up_obj->check_size($get_fileSize);//检查文件大小
    if($result_size){      $pics = $up_obj->save_file($get_fileType,$get_TmpFiles); //文件上传保存     
      $size = round($get_fileSize/1024,2);          $arr = array(            &#39;name&#39; => $get_fileName,
             &#39;pic&#39; => $pics,
             &#39;size&#39;=> $size,
             &#39;error&#39; => 2,
             &#39;list&#39;  =>$_POST[&#39;list&#39;]
         );       if($pics){ //检查文件上传状态
         echo json_encode($arr);
      }   
    }
  }
  
}?>

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