php+ajax实现带进度条的上传图片功能【附demo源码下载】


            本文实例讲述了php+ajax实现带进度条的上传图片功能。分享给大家供大家参考，具体如下：

运行效果图如下：



代码如下：





<?php

if(isset($_FILES["FileInput"]) && $_FILES["FileInput"]["error"]== UPLOAD_ERR_OK)

{

  ############ Edit settings ##############

  $UploadDirectory  = 'F:/Websites/file_upload/uploads/'; //specify upload directory ends with / (slash)

  ##########################################

  /*

  Note : You will run into errors or blank page if "memory_limit" or "upload_max_filesize" is set to low in "php.ini".

  Open "php.ini" file, and search for "memory_limit" or "upload_max_filesize" limit

  and set them adequately, also check "post_max_size".

  */

  //check if this is an ajax request

  if (!isset($_SERVER['HTTP_X_REQUESTED_WITH'])){

    die();

  }

  //Is file size is less than allowed size.

  if ($_FILES["FileInput"]["size"] > 5242880) {

    die("File size is too big!");

  }

  //allowed file type Server side check

  switch(strtolower($_FILES['FileInput']['type']))

    {

      //allowed file types

      case 'image/png':

      case 'image/gif':

      case 'image/jpeg':

      case 'image/pjpeg':

      case 'text/plain':

      case 'text/html': //html file

      case 'application/x-zip-compressed':

      case 'application/pdf':

      case 'application/msword':

      case 'application/vnd.ms-excel':

      case 'video/mp4':

        break;

      default:

        die('Unsupported File!'); //output error

  }

  $File_Name     = strtolower($_FILES['FileInput']['name']);

  $File_Ext      = substr($File_Name, strrpos($File_Name, '.')); //get file extention

  $Random_Number   = rand(0, 9999999999); //Random number to be added to name.

  $NewFileName    = $Random_Number.$File_Ext; //new file name

  if(move_uploaded_file($_FILES['FileInput']['tmp_name'], $UploadDirectory.$NewFileName ))

    {

    die('Success! File Uploaded.');

  }else{

    die('error uploading File!');

  }

}

else

{

  die('Something wrong with upload! Is "upload_max_filesize" set correctly?');

}







完整实例代码点击此处本站下载。

更多关于PHP相关内容感兴趣的读者可查看本站专题：《php文件操作总结》、《PHP运算与运算符用法总结》、《PHP网络编程技巧总结》、《PHP基本语法入门教程》、《php操作office文档技巧总结(包括word,excel,access,ppt)》、《php日期与时间用法总结》、《php面向对象程序设计入门教程》、《php字符串(string)用法总结》、《php+mysql数据库操作入门教程》及《php常见数据库操作技巧汇总》

希望本文所述对大家PHP程序设计有所帮助。