Tutorial on how to upload images without refreshing using php html5,

Table of Contents

php html5 tutorial for uploading images without refreshing,

Articles you may be interested in:

Home

Backend Development

PHP Tutorial

Tutorial on how to upload images without refreshing using php html5, _PHP tutorial

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jul 12, 2016 am 09:00 AM

html5 php upload picture No refresh

php html5 tutorial for uploading images without refreshing,

This article introduces you to a new way to upload images, using HTML5's FileReader to read image files, and then convert the data Transmitted to the server and processed using PHP. The implementation process is as follows (with picture preview function)
Front-end html code upload,html

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>上传</title>
<script type="text/javascript" src="js/jquery.min.js"></script>
<style>
.upload{
  width:300px;
  height:200px;
  position:relative;
}
.upload input[type='file']{
  position:absolute;
  width:70px;
  top:0;
  left:0;
  z-index:10;
  opacity:0;
  filter:alpha(opacity=0);
}
.upload input.selbutton{
  width:70px;
  height:30px;
  background:#cf001b;
  color:#FFF;
  font-size:14px;
  position:absolute;
  top:0;left:0;
  z-index:9;
  border:none;
  cursor:pointer;
}
.upload input.upbutton{
  width:70px;
  height:30px;
  background:#cf001b;
  color:#FFF;
  font-size:14px;
  position:absolute;
  top:50px;left:0;
  z-index:10;
  border:none;
  cursor:pointer;
}
</style>
</head>
<body>
<div class='upload'>
  <input type="file" name="file" />
  <input type="button" name="selbutton" class="selbutton" value="选择文件" />
  <input type="button" name="upbutton" class="upbutton" value="上传" />
</div>
<div class='previews'>
  <img src="#" class="image_thumb" alt="图片预览"/>
</div>
</body>
</html>

Copy after login

The style is as shown below

Next is the js code

<script type="text/javascript">
  $(".upbutton").click(function(){
    //定义允许上传的图片格式 在前台就可以直接判断，不合法的格式将不会上传
   var filetype = ['jpg','jpeg','png','gif'];
   if($('.image').get(0).files){
      fi = $('.image').get(0).files[0]; //得到文件信息
      //判断文件格式是否是图片 如果不是图片则返回false
      var fname = fi.name.split('.');
      if(filetype.indexOf(fname[1].toLowerCase()) == -1){
        alert('文件格式不支持');
        return ;
      }
      //实例化h5的fileReader
      var fr = new FileReader();
      fr.readAsDataURL(fi); //以base64编码格式读取图片文件
      fr.onload = function(frev){
        pic = frev.target.result; //得到结果数据
      //开始上传之前，预览图片
 $('.image_thumb').attr('src',pic);
//使用ajax 利用post方式提交数据
        $.post(
          'handle.php',
          {
             message:pic,
            filename:fname[0],
            filetype:fname[1],
            filesize:fi.size
          },
          function(data){
            data = eval('('+data+')');
            if(data.code == 1 || data.code == 2){
              console.log('上传失败')
            }else if(data.code == 0){
              console.log('上传成功')
            }
          }
        );
      }
    }
  })
</script>

Copy after login

Next is the PHP processing code handle.php

$imgtype = array(
  'gif'=>'gif',
  'png'=>'png',
  'jpg'=>'jpeg',
  'jpeg'=>'jpeg'
); //图片类型在传输过程中对应的头信息
$message = $_POST['message']; //接收以base64编码的图片数据
$filename = $_POST['filename']; //接收文件名称
$ftype = $_POST['filetype']; //接收文件类型
//首先将头信息去掉，然后解码剩余的base64编码的数据
$message = base64_decode(substr($message,strlen('data:image/'.$imgtype[strtolower($ftype)].';base64,')));
$filename = $filename.".".$ftype;
$furl = "D:/now/";
//开始写文件
$file = fopen($furl.$filename,"w");
if(fwrite($file,$message) === false){
  echo json_encode(array('code'=>1,'con'=>'failed'));
  exit;
}
echo json_encode(array('code'=>0,'con'=>$filename));

Copy after login

The effect of selecting a file and clicking upload is as shown below

The above is the code for uploading the entire image. Of course, there are many areas that can be optimized for the PHP part, such as the file name part, which can be renamed to ensure that the file name after uploading with the same file name is different, etc. I just started using this upload method. I was inspired by Node.js for uploading, and then I tried to apply it to PHP. I didn't expect that the upload could be successful.

I hope you can also upload images according to this method.

Articles you may be interested in:

PHP image upload class with image display
Simple PHP image upload program
php ajax upload image without refresh Example code
php image upload class code
thinkphp implements image upload function sharing
Using PHP and HTML5 FormData to implement refresh-free file upload tutorial
ThinkPHP combination AjaxFileUploader method to implement refresh-free file upload
Detailed explanation of multiple file and image upload examples in php

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Assassin's Creed Shadows: Seashell Riddle Solution

3 weeks ago By DDD

What's New in Windows 11 KB5054979 & How to Fix Update Issues

2 weeks ago By DDD

Where to find the Crane Control Keycard in Atomfall

3 weeks ago By DDD

Roblox: Dead Rails - How To Complete Every Challenge

4 weeks ago By DDD

Atomfall guide: item locations, quest guides, and tips

1 months ago By DDD

Hot Tools

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Where is the login entrance for gmail email?

7682

Java Tutorial

1639

CakePHP Tutorial

1393

Laravel Tutorial

1286

PHP Tutorial

1229

Related knowledge

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

Explain the match expression (PHP 8 ) and how it differs from switch. Apr 06, 2025 am 12:03 AM

In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.

See all articles