How to use PHP to develop simple online navigation functions
How to use PHP to develop simple online navigation functions
Navigation websites are very common in modern society. They help users quickly find the information they need and provide quick links. to other useful websites. Using PHP to develop simple online navigation functions can help us build a customizable and easy-to-maintain navigation website. This article will introduce how to use PHP to write a simple online navigation website and provide specific code examples.
Step 1: Create a database table
First, we need to create a database to store navigation links. Create a database named "navigation" in MySQL, and then create a table named "links" in the database. The table should contain the following fields: id (auto-incrementing primary key), title (link title), url (link address), order (sort).
CREATE DATABASE navigation;
USE navigation;
CREATE TABLE links (
id INT PRIMARY KEY AUTO_INCREMENT,
title VARCHAR(50) NOT NULL,
url VARCHAR(100) NOT NULL,
order INT NOT NULL
);Step 2: Connect to the database
At the beginning of the PHP file, we need to connect to the database. Create a file called "db_connect.php" and add the following code:
<?php
$servername = "localhost";
$username = "root";
$password = "password";
$dbname = "navigation";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
}
?>Make sure to change "root" and "password" to your database username and password.
Step 3: Add a link to the database
Now we can write a form to add a new link to the database. Create a file called "add_link.php" and add the following code:
<?php
include 'db_connect.php';
if ($_SERVER["REQUEST_METHOD"] == "POST") {
$title = $_POST["title"];
$url = $_POST["url"];
$order = $_POST["order"];
$sql = "INSERT INTO links (title, url, order) VALUES ('$title', '$url', '$order')";
if ($conn->query($sql) === TRUE) {
echo "Link added successfully";
} else {
echo "Error adding link: " . $conn->error;
}
}
$conn->close();
?>
<!DOCTYPE html>
<html>
<head>
<title>Add Link</title>
</head>
<body>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
Title: <input type="text" name="title" required><br>
URL: <input type="text" name="url" required><br>
Order: <input type="number" name="order" required><br>
<input type="submit" value="Add Link">
</form>
</body>
</html>This file will create a form where the user can enter the link's title, URL, and sequence number. When the user submits the form, a new link record is added to the database.
Step 4: Display the linked list
Finally, we need to write a file to display the linked list in the database. Create a file called "index.php" and add the following code:
<?php
include 'db_connect.php';
$sql = "SELECT * FROM links ORDER BY order";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
while($row = $result->fetch_assoc()) {
echo "<a href='" . $row["url"] . "'>" . $row["title"] . "</a><br>";
}
} else {
echo "No links found";
}
$conn->close();
?>This file will retrieve all links from the database and display them as a list of hyperlinks.
After completing the above steps, you can organize these files into a folder and upload them to your web server. When users visit "index.php" they will see a list of all links in the database. Users can also add new links by visiting "add_link.php".
During development, you can extend and customize the code according to your needs. You can add the ability to edit and delete links, or design a prettier interface. By developing in PHP, you can easily extend and maintain this simple online navigation functionality.
The above is the detailed content of How to use PHP to develop simple online navigation functions. For more information, please follow other related articles on the PHP Chinese website!
PHP Email: Step-by-Step Sending GuideMay 09, 2025 am 12:14 AMPHPisusedforsendingemailsduetoitsintegrationwithservermailservicesandexternalSMTPproviders,automatingnotificationsandmarketingcampaigns.1)SetupyourPHPenvironmentwithawebserverandPHP,ensuringthemailfunctionisenabled.2)UseabasicscriptwithPHP'smailfunct
How to Send Email via PHP: Examples & CodeMay 09, 2025 am 12:13 AMThe best way to send emails is to use the PHPMailer library. 1) Using the mail() function is simple but unreliable, which may cause emails to enter spam or cannot be delivered. 2) PHPMailer provides better control and reliability, and supports HTML mail, attachments and SMTP authentication. 3) Make sure SMTP settings are configured correctly and encryption (such as STARTTLS or SSL/TLS) is used to enhance security. 4) For large amounts of emails, consider using a mail queue system to optimize performance.
Advanced PHP Email: Custom Headers & FeaturesMay 09, 2025 am 12:13 AMCustomheadersandadvancedfeaturesinPHPemailenhancefunctionalityandreliability.1)Customheadersaddmetadatafortrackingandcategorization.2)HTMLemailsallowformattingandinteractivity.3)AttachmentscanbesentusinglibrarieslikePHPMailer.4)SMTPauthenticationimpr
Guide to Sending Emails with PHP & SMTPMay 09, 2025 am 12:06 AMSending mail using PHP and SMTP can be achieved through the PHPMailer library. 1) Install and configure PHPMailer, 2) Set SMTP server details, 3) Define the email content, 4) Send emails and handle errors. Use this method to ensure the reliability and security of emails.
What is the best way to send an email using PHP?May 08, 2025 am 12:21 AMThebestapproachforsendingemailsinPHPisusingthePHPMailerlibraryduetoitsreliability,featurerichness,andeaseofuse.PHPMailersupportsSMTP,providesdetailederrorhandling,allowssendingHTMLandplaintextemails,supportsattachments,andenhancessecurity.Foroptimalu
Best Practices for Dependency Injection in PHPMay 08, 2025 am 12:21 AMThe reason for using Dependency Injection (DI) is that it promotes loose coupling, testability, and maintainability of the code. 1) Use constructor to inject dependencies, 2) Avoid using service locators, 3) Use dependency injection containers to manage dependencies, 4) Improve testability through injecting dependencies, 5) Avoid over-injection dependencies, 6) Consider the impact of DI on performance.
PHP performance tuning tips and tricksMay 08, 2025 am 12:20 AMPHPperformancetuningiscrucialbecauseitenhancesspeedandefficiency,whicharevitalforwebapplications.1)CachingwithAPCureducesdatabaseloadandimprovesresponsetimes.2)Optimizingdatabasequeriesbyselectingnecessarycolumnsandusingindexingspeedsupdataretrieval.
PHP Email Security: Best Practices for Sending EmailsMay 08, 2025 am 12:16 AMThebestpracticesforsendingemailssecurelyinPHPinclude:1)UsingsecureconfigurationswithSMTPandSTARTTLSencryption,2)Validatingandsanitizinginputstopreventinjectionattacks,3)EncryptingsensitivedatawithinemailsusingOpenSSL,4)Properlyhandlingemailheaderstoa
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
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
SublimeText3 Mac version
God-level code editing software (SublimeText3)
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),
Notepad++7.3.1
Easy-to-use and free code editor
WebStorm Mac version
Useful JavaScript development tools
