Backend Development
PHP Tutorial
html - How can php not receive the option value under the select tag?
html - How can php not receive the option value under the select tag?
Why can’t php receive the option value under the select tag?
<code><?php
//index.php
$weeks = range(1, 7);
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>test</title>
</head>
<body>
<form action="request.php" method="get">
<table border="1">
<tr>
<?php
foreach ($weeks as $row)
{
?>
<td>
<p style="color: red;">星期<?php echo $row; ?> <b>上午</b></p>
<h1>第一节</h1>
课目
<select name="kemu1"/>。
<option value="">请选课目</option>
<option value="wuli">物理</option>
<option value="lishi">历史</option>
</select>
<br/>
时间
<select name="shijian1"/>。
<option value="">请选时间</option>
<option value="10：30">10：30</option>
<option value="11：00">11：00</option>
</select>
<br/>
<h1>第二节</h1>
课目
<select name="kemu2"/>。
<option value="">请选课目</option>
<option value="yingyu">英语</option>
<option value="yuwen">语文</option>
</select>
<br/>
时间
<select name="shijian2"/>。
<option value="">请选时间</option>
<option value="10：20">10：20</option>
<option value="11：30">11：30</option>
</select>
<br/>
<h1>第三节</h1>
课目
<select name="kemu3"/>。
<option value="">请选课目</option>
<option value="shuxue">数学</option>
<option value="shengwu">生物</option>
</select>
<br/>
时间
<select name="shijian3"/>。
<option value="">请选时间</option>
<option value="12：30">12：30</option>
<option value="13：00">13：00</option>
</select>
<br/>
<h1>第四节</h1>
课目
<select name="kemu4"/>。
<option value="">请选课目</option>
<option value="c++">C++</option>
<option value="php">PHP</option>
</select>
<br/>
时间
<select name="shijian4"/>。
<option value="">请选时间</option>
<option value="14：30">14：30</option>
<option value="15：00">15：00</option>
</select>
<br/>
<hr/>
<!--下午-->
<p style="color: red;">星期<?php echo $row; ?> <b>下午</b></p>
<h1>第五节</h1>
课目
<select name="kemu5"/>。
<option value="">请选课目</option>
<option value="IOS">IOS</option>
<option value="python">python</option>
</select>
<br/>
时间
<select name="shijian5"/>。
<option value="">请选时间</option>
<option value="15：40">15：40</option>
<option value="15：50">15：50</option>
</select>
<br/>
<h1>第六节</h1>
课目
<select name="kemu6"/>。
<option value="">请选课目</option>
<option value="CSS">CSS</option>
<option value="JS">JS</option>
</select>
<br/>
时间
<select name="shijian6"/>。
<option value="">请选时间</option>
<option value="16:30">16:30</option>
<option value="16:40">16:40</option>
</select>
<br/>
<h1>第七节</h1>
课目
<select name="kemu7"/>。
<option value="">请选课目</option>
<option value="JAVA">JAVA</option>
<option value="ruby">ruby</option>
</select>
<br/>
时间
<select name="shijian7"/>。
<option value="">请选时间</option>
<option value="17：30">17：30</option>
<option value="17：10">17：10</option>
</select>
<hr style="color: #2ECC71"/>
<br/>
</td>
<?php
}
?>
</tr>
</table>
<input type="submit" value="提交">
<hr/>
</form>
</body>
</html></code><code>//request.php
<?php
header("content-type:text/html;charset=utf-8");
include '../lib.php';
var_dump($_GET);
// 这里接收不到值
![图片描述][1]
// 但是url地址栏是有值的
![图片描述][2]
// 因为在html里面我嵌套了php语法，但是不使用这个foreach就能接收到值哦?
![图片描述][3]
// 我要的效果是这样的
// 这是我最终想要的目的
$arr = array(
'monday' => $_POST,
'tuesday' => $_POST,
'wednesday' => $_POST,
'thursday' => $_POST,
'friday' => $_POST,
'saturday' => $_POST,
'sunday' => $_POST
);
// html是这样的
</code>var_dump($_GET);
//No value received here
// But the url address bar has a value 
// Because I have nested php syntax in the html, but can I receive the value without using this foreach?
// The effect I want is like this, but it’s not worth it?
// This is what I ultimately want
$arr = array(
<code>'monday' => $_POST, 'tuesday' => $_POST, 'wednesday' => $_POST, 'thursday' => $_POST, 'friday' => $_POST, 'saturday' => $_POST, 'sunday' => $_POST</code>
);
// html is like this
Reply content:
Why can’t php receive the option value under the select tag?
<code><?php
//index.php
$weeks = range(1, 7);
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>test</title>
</head>
<body>
<form action="request.php" method="get">
<table border="1">
<tr>
<?php
foreach ($weeks as $row)
{
?>
<td>
<p style="color: red;">星期<?php echo $row; ?> <b>上午</b></p>
<h1>第一节</h1>
课目
<select name="kemu1"/>。
<option value="">请选课目</option>
<option value="wuli">物理</option>
<option value="lishi">历史</option>
</select>
<br/>
时间
<select name="shijian1"/>。
<option value="">请选时间</option>
<option value="10：30">10：30</option>
<option value="11：00">11：00</option>
</select>
<br/>
<h1>第二节</h1>
课目
<select name="kemu2"/>。
<option value="">请选课目</option>
<option value="yingyu">英语</option>
<option value="yuwen">语文</option>
</select>
<br/>
时间
<select name="shijian2"/>。
<option value="">请选时间</option>
<option value="10：20">10：20</option>
<option value="11：30">11：30</option>
</select>
<br/>
<h1>第三节</h1>
课目
<select name="kemu3"/>。
<option value="">请选课目</option>
<option value="shuxue">数学</option>
<option value="shengwu">生物</option>
</select>
<br/>
时间
<select name="shijian3"/>。
<option value="">请选时间</option>
<option value="12：30">12：30</option>
<option value="13：00">13：00</option>
</select>
<br/>
<h1>第四节</h1>
课目
<select name="kemu4"/>。
<option value="">请选课目</option>
<option value="c++">C++</option>
<option value="php">PHP</option>
</select>
<br/>
时间
<select name="shijian4"/>。
<option value="">请选时间</option>
<option value="14：30">14：30</option>
<option value="15：00">15：00</option>
</select>
<br/>
<hr/>
<!--下午-->
<p style="color: red;">星期<?php echo $row; ?> <b>下午</b></p>
<h1>第五节</h1>
课目
<select name="kemu5"/>。
<option value="">请选课目</option>
<option value="IOS">IOS</option>
<option value="python">python</option>
</select>
<br/>
时间
<select name="shijian5"/>。
<option value="">请选时间</option>
<option value="15：40">15：40</option>
<option value="15：50">15：50</option>
</select>
<br/>
<h1>第六节</h1>
课目
<select name="kemu6"/>。
<option value="">请选课目</option>
<option value="CSS">CSS</option>
<option value="JS">JS</option>
</select>
<br/>
时间
<select name="shijian6"/>。
<option value="">请选时间</option>
<option value="16:30">16:30</option>
<option value="16:40">16:40</option>
</select>
<br/>
<h1>第七节</h1>
课目
<select name="kemu7"/>。
<option value="">请选课目</option>
<option value="JAVA">JAVA</option>
<option value="ruby">ruby</option>
</select>
<br/>
时间
<select name="shijian7"/>。
<option value="">请选时间</option>
<option value="17：30">17：30</option>
<option value="17：10">17：10</option>
</select>
<hr style="color: #2ECC71"/>
<br/>
</td>
<?php
}
?>
</tr>
</table>
<input type="submit" value="提交">
<hr/>
</form>
</body>
</html></code><code>//request.php
<?php
header("content-type:text/html;charset=utf-8");
include '../lib.php';
var_dump($_GET);
// 这里接收不到值
![图片描述][1]
// 但是url地址栏是有值的
![图片描述][2]
// 因为在html里面我嵌套了php语法，但是不使用这个foreach就能接收到值哦?
![图片描述][3]
// 我要的效果是这样的
// 这是我最终想要的目的
$arr = array(
'monday' => $_POST,
'tuesday' => $_POST,
'wednesday' => $_POST,
'thursday' => $_POST,
'friday' => $_POST,
'saturday' => $_POST,
'sunday' => $_POST
);
// html是这样的
</code>var_dump($_GET);
//No value received here
// But the url address bar has a value
// Because I have nested php syntax in the html, but can I receive the value without using this foreach?
// The effect I want is like this, but it’s not worth it?
// This is what I ultimately want
$arr = array(
<code>'monday' => $_POST, 'tuesday' => $_POST, 'wednesday' => $_POST, 'thursday' => $_POST, 'friday' => $_POST, 'saturday' => $_POST, 'sunday' => $_POST</code>
);
// html is like this
select Do not write self-closing
Thanks for the invitation.
If you follow RESTful, you should still use POST to transmit data
Then if you need to get it, just use $_POST['key'] to get it.
If you cannot get the value, it is recommended that you use the js console to check whether your key is correct to avoid duplication.
Your $_GET is empty. If I guessed correctly, the key value is duplicated. why?
You see, foreach is traversing to the end, and what you get must be empty at the end.
So, the conclusion is:
<code>检查一下你的key值，避免重复。</code>
Such an obvious mistake, when you use foreach, HTML pages similar to kemu1 have a total of 7. When you submit, the value received by the backend php In fact, it will be the value of the last name selection box in the HTML page, so the value currently received by the backend will only be week 7. There are two ways to fix this bug, as follows
- Change the
- name
values of
selectinto arrays, such askemu1intokemu1[]When - foreach
loops, put the value of
$rowinto thenameofselect, such as{$row}-kemu1, so that there is no duplicatenamevalue and it will beok
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
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
1676
14
1429
52
1333
25
1278
29
1257
24
PHP and Python: Different Paradigms Explained
Apr 18, 2025 am 12:26 AM
PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.
PHP: Handling Databases and Server-Side Logic
Apr 15, 2025 am 12:15 AM
PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.
PHP's Purpose: Building Dynamic Websites
Apr 15, 2025 am 12:18 AM
PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.
HTML: The Structure, CSS: The Style, JavaScript: The Behavior
Apr 18, 2025 am 12:09 AM
The roles of HTML, CSS and JavaScript in web development are: 1. HTML defines the web page structure, 2. CSS controls the web page style, and 3. JavaScript adds dynamic behavior. Together, they build the framework, aesthetics and interactivity of modern websites.
Choosing Between PHP and Python: A Guide
Apr 18, 2025 am 12:24 AM
PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.
PHP and Python: A Deep Dive into Their History
Apr 18, 2025 am 12:25 AM
PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.
Why Use PHP? Advantages and Benefits Explained
Apr 16, 2025 am 12:16 AM
The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.
PHP's Impact: Web Development and Beyond
Apr 18, 2025 am 12:10 AM
PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip
