How to use PHP to implement a simple online image upload and display system-PHP Tutorial-php.cn

Home

Backend Development

PHP Tutorial

How to use PHP to implement a simple online image upload and display system

PHPz

Sep 25, 2023 am 09:21 AM

phpupload pictureOnline display

How to use PHP to implement a simple online image upload and display system

The image upload and display system is one of the commonly used functions of modern websites and is used during the development process PHP can quickly implement this function. This article will introduce how to use PHP to write a simple online image upload and display system, and provide specific code examples.

1. Create database and table

First, we need to create a database and table to store the uploaded image information. Use the following SQL statement to create a table named "images" and set the id, filename, and uploaded_date columns.

CREATE DATABASE image_uploads;
USE image_uploads;
CREATE TABLE images (
    id INT AUTO_INCREMENT PRIMARY KEY,
    filename VARCHAR(255) NOT NULL,
    uploaded_date DATETIME
);

2. Create an upload form page

The next step is to create a form page for uploading images. Create a file named "upload.html" and use the following code:

<!DOCTYPE html>
<html>
<head>
    <title>图片上传</title>
</head>
<body>
    <form action="upload.php" method="POST" enctype="multipart/form-data">
        <input type="file" name="image">
        <input type="submit" value="上传">
    </form>
</body>
</html>

This form page contains a file selection box and an upload button. When the user selects an image file and clicks the upload button, the form Will be submitted to the "upload.php" page for processing.

3. Create an upload script

Create a file named "upload.php" and use the following code:

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    if (isset($_FILES["image"])) {
        $file = $_FILES["image"];
        $filename = $file["name"];
        $target = "uploads/" . basename($filename);
        $uploaded_date = date("Y-m-d H:i:s");

        if (move_uploaded_file($file["tmp_name"], $target)) {
            $con = new mysqli("localhost", "root", "password", "image_uploads");
            $stmt = $con->prepare("INSERT INTO images (filename, uploaded_date) VALUES (?, ?)");
            $stmt->bind_param("ss", $filename, $uploaded_date);
            $stmt->execute();
            $stmt->close();
            $con->close();

            echo "图片上传成功";
        } else {
            echo "图片上传失败";
        }
    }
}
?>

This script first checks whether a file has been Upload and get the file's name, destination path, and upload date. Then, the file is moved to the specified target path and the file information is stored in the database.

4. Create a picture display page

Finally, we need to create a page to display the uploaded pictures. Create a file named "gallery.php" and use the following code:

<!DOCTYPE html>
<html>
<head>
    <title>图片展示</title>
</head>
<body>
    <?php
    $con = new mysqli("localhost", "root", "password", "image_uploads");
    $result = $con->query("SELECT * FROM images ORDER BY uploaded_date DESC");

    while ($row = $result->fetch_assoc()) {
        echo '<img  src="uploads/' . $row["filename"] . '"    style="max-width:90%"  style="max-width:90%" alt="How to use PHP to implement a simple online image upload and display system" >';
    }

    $con->close();
    ?>
</body>
</html>

This page uses a database query to obtain all uploaded image information and displays each image on the page through a loop.

5. Final Notes

Please make sure to create a folder named "uploads" on the server to store uploaded images. And give the folder appropriate write permissions.

The above are the steps and code examples for using PHP to implement a simple online image upload and display system. You can modify and extend the code according to actual needs to create more powerful image uploading and display functions.

The above is the detailed content of How to use PHP to implement a simple online image upload and display system. 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

The Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedApr 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 and Python: A Deep Dive into Their HistoryApr 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.

Choosing Between PHP and Python: A GuideApr 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 Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

See all articles