search
HomeBackend DevelopmentPHP TutorialTable data processing skills in PHP

Table data processing skills in PHP

May 25, 2023 am 08:12 AM
php form processingData processing skillsTable data processing

In website development, tables are a common element used to display data, perform data entry and data processing, etc. In PHP, processing table data is also a relatively common operation. In this article, we will introduce some commonly used PHP table data processing techniques.

  1. Get data from the form

In PHP, form data can be obtained through $_POST or $_GET. $_POST is when the form is submitted using the POST method, $_GET is when the form is submitted using the GET method. When there are multiple controls with the same name in the form, you can use an array to save the values ​​of these controls. Such as the following form:

<form method="post" action="">
  <label for="name">姓名:</label>
  <input type="text" name="name"><br>
  <label for="email">邮箱:</label>
  <input type="text" name="email"><br>
  <input type="submit" value="提交">
</form>

In PHP, you can get the form data in the following ways:

$name = $_POST['name'];
$email = $_POST['email'];
  1. Sort the table data

If you want To sort the data in the table, you can use PHP's built-in functions sort() and rsort(). Among them, sort() is ascending sort and rsort() is descending sort. Both functions change the key values ​​of the array.

For example, sort the following array in ascending order:

$numbers = array(10, 5, 8, 3, 6);
sort($numbers);
print_r($numbers);

The output result is:

Array ( [0] => 3 [1] => 5 [2] => 6 [3] => 8 [4] => 10 )
  1. Paging table data

When there is a lot of table data, in order to facilitate users to browse and process, the data needs to be paginated. In PHP, we can use the LIMIT keyword to implement paging. LIMIT can receive two parameters, the first parameter is the offset, and the second parameter is the number of records returned.

For example, if we have a students table with 100 records, we want to display 10 records per page. We can use the following code to achieve this:

$page = isset($_GET['page']) ? $_GET['page'] : 1;
$limit = 10;
$offset = ($page - 1) * $limit;

$query = "SELECT * FROM `students` LIMIT $offset, $limit";

Among them, $page represents the current page number, $limit represents the number of records displayed on each page, and $offset represents the offset.

  1. Search table data

When there is a lot of table data, we may need to search the data to quickly find the information we need. In PHP, you can use the LIKE keyword of the SELECT statement to implement fuzzy search.

For example, if we want to search for students whose name contains "Zhang" in the students table, we can use the following code:

$name = isset($_GET['name']) ? $_GET['name'] : '';
$query = "SELECT * FROM `students` WHERE `name` LIKE '%$name%'";

Where, $name represents the search keyword, in the SQL statement Use % to represent the wildcard character.

  1. Summary tabular data

When there is a large amount of tabular data, we may need to summarize, count and calculate the data. In PHP, you can use the SUM, AVG, COUNT, MIN and MAX functions of the SELECT statement to achieve this.

For example, if we want to calculate the average score of all students in the students table, we can use the following code:

$query = "SELECT AVG(`score`) FROM `students`";

Where, the AVG function is used to calculate the average.

  1. Export table data

When table data needs to be uploaded or saved, we may need to export the data in CSV, Excel or other formats. In PHP, you can use the fputcsv function to save data to a file in CSV format. In Excel, CSV files can be imported into workbooks.

For example, if we want to save the following array as a CSV file:

$students = array(
  array('id', 'name', 'score'),
  array(1, '张三', 80),
  array(2, '李四', 90),
  array(3, '王五', 85),
);

We can use the following code to save it as a CSV file:

$fp = fopen('students.csv', 'w');
foreach ($students as $student) {
    fputcsv($fp, $student);
}
fclose($fp);

The above is what is commonly used in PHP Table data processing skills. Mastering these skills can make it easier for us to process tabular data and improve work efficiency.

The above is the detailed content of Table data processing skills in PHP. For more information, please follow other related articles on the PHP Chinese website!

Statement
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
PHP's Current Status: A Look at Web Development TrendsPHP's Current Status: A Look at Web Development TrendsApr 13, 2025 am 12:20 AM

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP vs. Other Languages: A ComparisonPHP vs. Other Languages: A ComparisonApr 13, 2025 am 12:19 AM

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP vs. Python: Core Features and FunctionalityPHP vs. Python: Core Features and FunctionalityApr 13, 2025 am 12:16 AM

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

PHP: A Key Language for Web DevelopmentPHP: A Key Language for Web DevelopmentApr 13, 2025 am 12:08 AM

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP: The Foundation of Many WebsitesPHP: The Foundation of Many WebsitesApr 13, 2025 am 12:07 AM

The reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.

Beyond the Hype: Assessing PHP's Role TodayBeyond the Hype: Assessing PHP's Role TodayApr 12, 2025 am 12:17 AM

PHP remains a powerful and widely used tool in modern programming, especially in the field of web development. 1) PHP is easy to use and seamlessly integrated with databases, and is the first choice for many developers. 2) It supports dynamic content generation and object-oriented programming, suitable for quickly creating and maintaining websites. 3) PHP's performance can be improved by caching and optimizing database queries, and its extensive community and rich ecosystem make it still important in today's technology stack.

What are Weak References in PHP and when are they useful?What are Weak References in PHP and when are they useful?Apr 12, 2025 am 12:13 AM

In PHP, weak references are implemented through the WeakReference class and will not prevent the garbage collector from reclaiming objects. Weak references are suitable for scenarios such as caching systems and event listeners. It should be noted that it cannot guarantee the survival of objects and that garbage collection may be delayed.

Explain the __invoke magic method in PHP.Explain the __invoke magic method in PHP.Apr 12, 2025 am 12:07 AM

The \_\_invoke method allows objects to be called like functions. 1. Define the \_\_invoke method so that the object can be called. 2. When using the $obj(...) syntax, PHP will execute the \_\_invoke method. 3. Suitable for scenarios such as logging and calculator, improving code flexibility and readability.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.