What is the method to implement progress bar in php
The method for php to implement the progress bar is: 1. Use ajax to request the address of the logical processing; 2. During the logical processing, use the session to save the processing progress; 3. Use ajax to request another address for querying the progress. , thereby achieving real-time feedback.
There are two main ways to implement the progress bar in php. One is to use "output buffer control" to directly output the progress bar, and the other is the ajax method.
(Learning video recommendation: java course)
First let’s talk about the “output buffer control” method:
This method mainly uses several functions of PHP Buffering function, this method can be run directly without changing the configuration file. The code is posted below:
<?php
set_time_limit(0); //设置程序执行时间
ignore_user_abort(true); //设置断开连接继续执行
header('X-Accel-Buffering: no'); //关闭buffer
header('Content-type: text/html;charset=utf-8'); //设置网页编码
ob_start(); //打开输出缓冲控制
echo str_repeat(' ',1024*4); //字符填充
$width = 1000;
$html = '<div style="margin:100px auto; padding: 8px; border: 1px solid gray; background: #EAEAEA; width: %upx"><div style="padding: 0; background-color: white; border: 1px solid navy; width: %upx"><div id="progress" style="padding: 0; background-color: #FFCC66; border: 0; width: 0px; text-align: center; height: 16px"></div></div><div id="msg" style="font-family: Tahoma; font-size: 9pt;">正在处理...</div><div id="percent" style="position: relative; top: -34px; text-align: center; font-weight: bold; font-size: 8pt">0%%</div></div>';
echo sprintf($html, $width+8, $width);
echo ob_get_clean(); //获取当前缓冲区内容并清除当前的输出缓冲
flush(); //刷新缓冲区的内容，输出
$length = 11;
for($i=0; $i<$length; $i++) {
sleep(rand(1,2));
$proportion = ($i+1)/$length;
if($i+1 == $length){
$msg = '同步完成';
}else{
$msg = '正在同步第' . ($i+1) . '个用户';
}
$script = '<script>document.getElementById("percent").innerText="%u%%";document.getElementById("progress").style.width="%upx";document.getElementById("msg").innerText="%s";</script>';
echo sprintf($script, intval($proportion*100), intval(($i+1)/$length)*$width, $msg);
echo ob_get_clean(); //获取当前缓冲区内容并清除当前的输出缓冲
flush(); //刷新缓冲区的内容，输出
}The "ajax method" is a little more troublesome. The logic of this method is to use ajax to request first (preferably It is the address of "logical processing" (asynchronous request). During the logical processing, use session or other storage media (such as memcache, redis, etc.) to save the processing progress, and use ajax to request (preferably a synchronous request) another address to query the progress. , to achieve real-time feedback.
The code is as follows:
First is the html file
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script type="text/javascript" src="./jquery-1.10.2.min.js"></script>
<title>同步</title>
</head>
<body>
<input type="button" name="syn" id="syn" value="同步" />
<div id="progressBar" style="margin: 50px auto; padding: 8px; border: 1px solid gray; background: #EAEAEA; width: 1008px;display:none">
<div style="padding: 0; background-color: white; border: 1px solid navy; width: 1000px">
<div id="progress" style="padding: 0; background-color: #FFCC66; border: 0; width: 0px; text-align: center; height: 16px"></div>
</div>
<div id="msg">正在处理...</div>
<div id="percent" style="position: relative; top: -18px; text-align: center; font-weight: bold; font-size: 8pt">0%</div>
</div>
</body>
<script>
function query(timestamp){
$.ajax({
type:'post',
url:'/test1.php', //查询进度
data:{ timestamp:timestamp},
dataType: "json",
async:false,
success: function(data){
if(data.code=='10000'){
data1 = data.data;
document.getElementById("percent").innerText= data1.percent + "%";
document.getElementById("progress").style.width=data1.progress + "px";
document.getElementById("msg").innerText=data1.msg;
if(data1.percent == 100){
$("#syn").attr('disabled', false);
return ;
}
}else{
document.getElementById("msg").innerText=data.msg;
}
setTimeout('query(' + timestamp + ')', 1000);
}
});
}
$("#syn").click(function(){
var timestamp = Date.parse(new Date());
$("#syn").attr('disabled', 'disabled');
$("#progressBar").css('display', 'block');
$.ajax({
type:'post',
url:'/test.php', //执行处理
data:{ timestamp:timestamp},
dataType: "json",
async:true,
success: function(data){
if(data.code=='10000'){
console.log('同步成功');
//data1 = data.data;
//document.getElementById("percent").innerText= data1.percent + "%";
//document.getElementById("progress").style.width=data1.progress + "px";
//document.getElementById("msg").innerText=data1.msg;
}else{
document.getElementById("msg").innerText=data1.msg;
}
}
});
setTimeout('query(' + timestamp + ')', 1000);
});
</script>
</html>test.php file
<?php
set_time_limit(0); //设置程序执行时间
ignore_user_abort(true); //设置断开连接继续执行
$timestamp = $_POST['timestamp']; //省略一切校验
$width = 1000;
$length = 11;
for($i=0; $i<$length; $i++) {
sleep(rand(1,2)); //模拟处理时间
$proportion = ($i+1)/$length;
if($i+1 == $length){
$msg = '同步完成';
}else{
$msg = '正在同步第' . ($i+1) . '个用户';
}
$data = array(
'percent' => intval($proportion*100),
'progress' => intval($width*($i+1)/$length),
'msg' => $msg
);
session_start();
$_SESSION['now_percent' . $timestamp] = $data;
session_write_close(); //释放session锁
}
echo json_encode(array(
'code' => 10000,
'data' => $data
));test1.php
<?php
//忽略所有校验，直接写主要部分
$timestamp = $_POST['timestamp']; //省略一切校验
session_start();
$now_percent = @$_SESSION['now_percent' . $timestamp];
session_write_close();
if(empty($now_percent)){
echo json_encode(array(
'code' => 10001,
'msg' => '正在处理...'
));exit;
}else{
echo json_encode(array(
'code' => 10000,
'data' => $now_percent
));exit;
}Supplement:
1. The reason why setTimeout is used instead of setinterval to check regularly is because if the set time is too short and the request response time is too long, the display will be chaotic.
2. After using the session, be careful to release it in time, otherwise the query will be waiting because the session is locked. It is best to release it after use.
Related recommendations: php training
The above is the detailed content of What is the method to implement progress bar in php. For more information, please follow other related articles on the PHP Chinese website!
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
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
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
1377
52
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
Discuss CakePHP
Sep 10, 2024 pm 05:28 PM
CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu
CakePHP File upload
Sep 10, 2024 pm 05:27 PM
To work on file upload we are going to use the form helper. Here, is an example for file upload.
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
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
CakePHP Quick Guide
Sep 10, 2024 pm 05:27 PM
CakePHP is an open source MVC framework. It makes developing, deploying and maintaining applications much easier. CakePHP has a number of libraries to reduce the overload of most common tasks.
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 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,
