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User interface design and optimization of PHP online voting system

王林Original: 2023-08-09 20:45:051560browse

Introduction:
With the development of the Internet, various online voting systems are becoming more and more widely used . As an open source, feature-rich server-side scripting language, PHP has become one of the preferred languages for building online voting systems. In this article, we will explore how to design and optimize the user interface of an online voting system in PHP.

1. Interface design

Simple and clear layout design
Good user interface design can provide a user-friendly experience. When designing the user interface of the voting system, we should pay attention to the simplicity and clarity of the layout. A typical voting system should include the following core parts:
Question title
Option list
Voting button

<html>
<head>
<title>投票系统</title>
</head>
<body>
<h2>问题标题</h2>
<form method="post" action="">
  <ul>
    <li><input type="radio" name="option" value="option1">选项1</li>
    <li><input type="radio" name="option" value="option2">选项2</li>
    <li><input type="radio" name="option" value="option3">选项3</li>
  </ul>
  <input type="submit" value="投票">
</form>
</body>
</html>

Visual data display
In the voting system, users not only vote, but also need to understand the current voting situation. Therefore, it is necessary to add visual data display to the user interface.

<html>
<head>
<title>投票系统</title>
<style>
.chart {
  display: inline-block;
  width: 200px;
  height: 20px;
  background-color: #ccc;
}
.option1 {
  background-color: green;
}
.option2 {
  background-color: orange;
}
.option3 {
  background-color: blue;
}
</style>
</head>
<body>
<h2>问题标题</h2>
<form method="post" action="">
  <ul>
    <li><input type="radio" name="option" value="option1">选项1</li>
    <li><input type="radio" name="option" value="option2">选项2</li>
    <li><input type="radio" name="option" value="option3">选项3</li>
  </ul>
  <input type="submit" value="投票">
</form>
<h3>投票结果</h3>
<div class="chart option1" style="width: 60%"></div>
<div class="chart option2" style="width: 30%"></div>
<div class="chart option3" style="width: 10%"></div>
</body>
</html>

2. Interface optimization

Responsive design
Given that users now use a variety of different devices to access web pages, we need to apply responsiveness to the voting system Designed to fit devices of different screen sizes.

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>投票系统</title>
<style>
/* 布局样式 */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f1f1f1;
}
.container {
  max-width: 600px;
  margin: 0 auto;
  padding: 20px;
}
/* 表单样式 */
form {
  background-color: #fff;
  border-radius: 10px;
  padding: 20px;
}
/* 图表样式 */
.chart {
  display: inline-block;
  height: 20px;
  background-color: #ccc;
  margin-bottom: 10px;
}
.option1 {
  background-color: green;
}
.option2 {
  background-color: orange;
}
.option3 {
  background-color: blue;
}
</style>
</head>
<body>
<div class="container">
  <h2>问题标题</h2>
  <form method="post" action="">
    <ul>
      <li><input type="radio" name="option" value="option1">选项1</li>
      <li><input type="radio" name="option" value="option2">选项2</li>
      <li><input type="radio" name="option" value="option3">选项3</li>
    </ul>
    <input type="submit" value="投票">
  </form>
  <h3>投票结果</h3>
  <div class="chart option1" style="width: 60%"></div>
  <div class="chart option2" style="width: 30%"></div>
  <div class="chart option3" style="width: 10%"></div>
</div>
</body>
</html>

Prevent repeated voting
In order to ensure the accuracy of voting results, we need to limit users’ voting to prevent users from voting repeatedly. This can be achieved by adding the following logic to the PHP code:

<?php
session_start();

// 检查用户是否已经投过票
if (isset($_SESSION['hasVoted']) && $_SESSION['hasVoted']) {
  die('您已经投过票了！');
}

// 用户点击投票按钮时执行的逻辑
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
  // 处理投票逻辑
  // ...

  // 标记用户已经投过票
  $_SESSION['hasVoted'] = true;
}
?>

Summary:
Through reasonable user interface design and optimization, we can improve the user experience of the PHP online voting system. This article introduces technologies such as concise and clear layout design, visual data display, and responsive design. At the same time, we also added PHP code to prevent users from voting repeatedly. I hope these sample codes will be helpful for you to build the user interface of your PHP online voting system!

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