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。
【说明】：本文章由站长整理发布，文章内容不代表本站观点，如文中有侵权行为，请与本站客服联系(QQ:)！