Second-hand recycling website developed using PHP supports batch upload of images

The second-hand recycling website developed using PHP supports batch uploading of images

With the changes in the social environment and the improvement of people's awareness of environmental protection, the second-hand recycling industry is gradually emerging. In order to make it easier for everyone to recycle unused items, we decided to develop a second-hand recycling website. This website supports users to upload pictures in batches to better display the condition of the items and increase users' understanding and interest in the items.

Before implementing the image batch upload function, we need to ensure that the basic structure of the website has been completed. This includes the design and construction of databases, user account registration and login functions, etc. Next, we will introduce in detail how to implement the image batch upload function through PHP code.

First, we need to create a page for uploading images in the website. This page contains a file selection box and a submit button. Users can select multiple image files through the file selection box and then click the submit button to upload these images.

HTML code example:

<form action="upload.php" method="post" enctype="multipart/form-data">
  <input type="file" name="images[]" multiple>
  <input type="submit" value="上传">
</form>

Next, we need to create a PHP script that handles image uploads. We will save this script as a file called upload.php. In this script, we will process each image file uploaded by the user and save them to a specified directory on the server.

PHP code example:

<?php
$targetDir = "uploads/";  // 指定图片保存的目录
$allowedTypes = array('jpg', 'jpeg', 'png', 'gif');  // 允许上传的图片类型

if (!empty($_FILES['images']['name'][0])) {
    foreach ($_FILES['images']['name'] as $key => $name) {
        $tempFile = $_FILES['images']['tmp_name'][$key];
        $fileSize = $_FILES['images']['size'][$key];
        $fileType = $_FILES['images']['type'][$key];
        $extension = pathinfo($_FILES['images']['name'][$key], PATHINFO_EXTENSION);

        if (in_array(strtolower($extension), $allowedTypes)) {
            $targetFile = $targetDir . md5(uniqid()) . '.' . $extension;
            move_uploaded_file($tempFile, $targetFile);
            // 在这里可以将图片信息保存到数据库中，例如保存图片路径、用户ID等信息
            echo "图片上传成功：" . $targetFile . "<br>";
        } else {
            echo "不支持上传的图片类型：" . $name . "<br>";
        }
    }
} else {
    echo "请先选择图片";
}
?>

In the above code, we first specify the directory where the images are saved. Here we will use a folder named "uploads". Then, we define an array of image types that are allowed to be uploaded. Here we support images of jpg, jpeg, png and gif types.

In the following code, we use a loop to loop through each image file uploaded by the user. We first obtain the temporary file name, file size, file type, and file extension of each file. We then use the pathinfo function to get the extension of the file and check if the extension is in the array of types allowed to be uploaded.

If the file extension is legal, we will generate a unique name for the file and move the file to the specified directory. You can modify the way unique names are generated when moving files according to your needs. Finally, we can save the image information to the database here, such as saving image path, user ID and other information.

If the file extension is illegal, we will give the user a prompt telling him that the uploaded image type is not supported.

Finally, we give the user a corresponding prompt when the upload is successful or the image is not selected.

After completing the development of the above code, we can implement the image batch upload function in the second-hand recycling website. Through this function, users can easily upload multiple pictures to make items more intuitively displayed on the website. This will help increase users’ knowledge and interest in items and improve the efficiency and quality of the entire recycling process.

I hope this article can provide some reference and help to PHP developers who need to develop a second-hand recycling website and support the image batch upload function.

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