最近项目中要做一个带进度条的上传文件的功能,学习了Ajax,使用起来比较方便,将几个方法实现就行。

前端引入文件

前端上传HTML

    <div class="pk-system-messages"&gt;</div>

    <h1 class="uk-h2 uk-text-center" style="margin-top:-100px;"&gt;<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a><a href="https://www.jb51.cc/tag/shangchuan/" target="_blank" class="keywords">上传</a></h1>
    <div class="pk-system-messages"&gt;</div>

     <div class="container-main"&gt;
      <h1>Ajax Image Uploader</h1>
      <p>A simple tutorial to explain image uploading using jquery ajax and <a href="https://www.jb51.cc/tag/PHP/" target="_blank" class="keywords">PHP</a></p>

       <form id='myupload' action='new_upload.php' method='post' enctype='multipart/form-data'>
        <label for="file"&gt;Filename:</label>
       <input type="file" name="mypic" id="file"&gt;<br>
       <input type="submit" name="upload" class="btn btn-success" value="upload"&gt;
      </form>

        <div class="progress"&gt;
         <div class="progress-bar progress-bar-success progress-bar-striped" role="progressbar" aria-valuenow="45" aria-valuemin="0" aria-valuemax="100" style="width: 0%"&gt;
          <span class="sr-only"&gt;0% Complete</span>
       </div>
       </div>
      <div class="files"&gt;</div>
      <div class="showimg"&gt;</div>
     </div>

   </div>

PHP 文件上传类

PHP;"> protected $file_path = "files"; //当前files存储文件夹

protected $file_size = 1024000;

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";
$arr = array('error'=>'empty_name','type'=>$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" )) {

$types = $get_type;

}else{
$type = "check_type";
$arr = array('error'=>'format','type'=>$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 ) {
$arr = array('error'=>'large');
echo json_encode($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("YmdHis") . $rand . $file_type;
$path = $this->file_path."/".$pics;
$result = move_uploaded_file($file_tmp_name,$path);
if($result){
return $pics;
}else{
return false;
exit();
}

return $pics;

}

}
PHP 文件上传处理
<?php
include("upload.class.php");
$up_obj = new upload();

$get_fileName = $_FILES['mypic']['name'];
$get_fileSize = $_FILES['mypic']['size'];
$get_TmpFiles = $_FILES['mypic']['tmp_name'];

$get_fileType = strstr($get_fileName,'.');

$check_result = $up_obj->check_file($get_fileName);

if($check_result){

//检查文件类型
$result_type = $up_obj->check_type($get_fileType);

//检查文件大小
if($result_type){

$result_size = $up_obj->check_size($get_fileSize);

if($result_size){
  //<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a><a href="https://www.jb51.cc/tag/shangchuan/" target="_blank" class="keywords">上传</a>保存  
  $pics = $up_obj->save_file($get_fileType,$get_TmpFiles);   
  $size = round($get_fileSize/1024,2);
      $arr = array(
        'name' => $get_fileName,'pic' => $pics,'size'=> $size,'error' => 2
     );

   //检查<a href="https://www.jb51.cc/tag/wenjian/" target="_blank" class="keywords">文件</a><a href="https://www.jb51.cc/tag/shangchuan/" target="_blank" class="keywords">上传</a>状态
   if($pics){
     echo json_encode($arr);
     /*
     执行<a href="https://www.jb51.cc/tag/shangchuan/" target="_blank" class="keywords">上传</a>完成逻辑.....
     */
  }   
}

}

文件上传效果如图：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程之家。

原文链接：https://www.f2er.com/php/18650.html

PHP+Ajax异步带进度条上传文件实例

protected $file_size = 1024000;

$types = $get_type;

return $pics;

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