How to implement gallery display and management in WeChat applet with PHP

With the popularity of WeChat mini programs, more and more companies and individuals have begun to pay attention to the development and application of WeChat mini programs. In WeChat mini programs, gallery display and management is a very important function. This article will introduce how to use PHP to implement gallery display and management in WeChat mini programs.

1. Overview of the WeChat Mini Program Gallery

The gallery in the WeChat Mini Program refers to a service for storing and managing pictures. It helps us upload, display and manage images quickly. In the WeChat mini program, the gallery is mainly used for the following aspects:

1. Product display: In the WeChat mini program, many merchants will use the gallery to display their product pictures, which can increase the user's Purchase desire and increase merchant sales.
2. User avatar: In the WeChat applet, the user's avatar picture is also stored and managed through the gallery. When a user uploads an avatar, the system will automatically save it to the gallery for future use.
3. News pictures: In WeChat mini programs, many news require pictures. The gallery allows users to easily upload and manage news images, improving user experience.

2. PHP implements WeChat mini program gallery

PHP is a very popular server-side scripting language that can be used to develop various websites and applications. Gallery display and management in WeChat mini programs can be easily implemented using PHP.

1. Gallery upload

In the WeChat applet, after users upload pictures, they need to save them to the gallery. PHP can be implemented through the following code:

<?php
//设置文件上传路径
$upload_path = './uploads/';
//接收上传文件
//判断文件是否上传成功
if ($_FILES["file"]["error"] > 0) {
    echo "Error: " . $_FILES["file"]["error"] . "<br />";
} else {
    //获得上传文件的名称
    $file_name = $_FILES["file"]["name"];
    //将上传的文件移动到指定目录
    move_uploaded_file($_FILES["file"]["tmp_name"], $upload_path . $file_name);
    //返回上传成功的文件路径
    echo $upload_path . $file_name;
}
?>

The above code implements file upload through the PHP file upload function move_uploaded_file(). After the upload is successful, save the file to the specified directory and return the file path of the successfully uploaded file.

2. Gallery display

In the WeChat applet, we can use PHP to implement gallery display. The implementation method is as follows:

<?php
//设置图库目录
$gallery_path = './uploads/';
//读取图库目录下的所有文件
$img_list = glob($gallery_path . '*.{jpg,gif,png}', GLOB_BRACE);
//循环读取每个文件，并输出图库展示页面
foreach ($img_list as $img) {
    echo '<img src="' . $img . '" />';
}
?>

The above code reads all image files in the specified directory and outputs the images using HTML code. In this way, basic gallery display functions can be achieved.

3. Gallery Management

In practical applications, we need to implement the gallery management function so that users can easily delete or edit pictures in the gallery. PHP can also be implemented through the following code:

<?php
//设置图库目录
$gallery_path = './uploads/';
//读取图库目录下的所有文件
$img_list = glob($gallery_path . '*.{jpg,gif,png}', GLOB_BRACE);
//循环读取每个文件，并输出图库管理页面
foreach ($img_list as $img) {
    //输出图片和删除按钮
    echo '<div><img src="' . $img . '" /><button onclick="DeleteImage('' . $img . '')">删除</button></div>';
}
//删除图片
if (isset($_GET['delete'])) {
    $delete_file = $_GET['delete'];
    if (file_exists($delete_file) && is_file($delete_file)) {
        unlink($delete_file);
        header('Location: gallery.php');
    } else {
        echo '文件不存在';
    }
}
?>
<script>
function DeleteImage(file) {
    if (confirm('确定删除该图片吗？')) {
        location.href = 'gallery.php?delete=' + encodeURIComponent(file);
    }
}
</script>

The above code reads all image files in the specified directory and uses HTML code to output the image and delete button. If the user clicks the delete button, the image will be deleted from the server. After the deletion is completed, the page will jump to the gallery management page.

3. Summary

This article introduces how to use PHP to implement gallery display and management in WeChat mini programs. By using PHP, we can easily implement basic gallery functions and improve user experience. Of course, the above code is just an example, and it needs to be modified and optimized according to specific needs in actual applications.

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