PHP：从base64字符串中获取图像并将其存储在路径中

Question

Here's the PHP function that adds a new data into the MySQL database.

** I want to upload the image in the web server. **

public function addNewCategory($category_title, $strImage) {

    // get the image from the base64 string.
    $strImage = base64_decode($strImage);
    $image = imagecreatefromstring($strImage);
    if($image !== false) {
        header('Content-Type: image/png');
        imagepng($image);
        imagedestroy($image);
    }

    // set the path name of where the image is to be stored.
    $path = $_SERVER['SERVER_NAME']."/uploads/".$category_title.".png";

    // save the image in the path.
    file_put_contents($path, $image);

    // insert category and the image path into the MySQL database.
    $result = mysqli_query($this->db->connect(), "INSERT INTO category(category_title, path, created_at) VALUES ('$category_title', '$path', NOW())");

    if ($result) {
        return mysqli_fetch_array($result);
    } else {
        return false;
    }
}

With that function, the path variable is stored in the database, but the image is not actually stored in the path. What is wrong with the code above?

Edited I changed the path name into $path = $_SERVER['SERVER_NAME']."/MyProject/uploads/".$category_title.".png"; . Now the path value in the database turns out to be what I expected, but it seems like the image itself is not actually put in the path.

I added a new row to the database, manually typed the path in the browser to check if the image I sent is properly stored in the path, but the web server returns error 404.

Answer 1

To write file on server you need to set path, relative to your folder system on server. To store data in DB you need web path to your image:

//__DIR__ - path to your current script folder
$server_path = __DIR__."/uploads/".$category_title.".png";

// save the image in the server path.
file_put_contents($server_path, $image);

//Web path to your image
$web_path = $_SERVER['SERVER_NAME']."/uploads/".$category_title.".png";

//Write to DB web path of the image
$result = mysqli_query($this->db->connect(), "INSERT INTO category(category_title, path, created_at) VALUES ('$category_title', '$web_path', NOW())");