mysql 保存头像

<?php
// 假设上传的文件通过 $_FILES['avatar'] 获取
$target_dir = "uploads/";
$target_file = $target_dir . basename($_FILES["avatar"]["name"]);
$imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));

// 检查文件是否为图片
if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["avatar"]["tmp_name"]);
    if($check !== false) {
        if (move_uploaded_file($_FILES["avatar"]["tmp_name"], $target_file)) {
            echo "The file ". htmlspecialchars( basename( $_FILES["avatar"]["name"])). " has been uploaded.";
            
            // 将文件路径保存到数据库
            $conn = new mysqli("localhost", "username", "password", "database");
            if ($conn->connect_error) {
                die("Connection failed: " . $conn->connect_error);
            }
            
            $sql = "INSERT INTO users (avatar_path) VALUES ('$target_file')";
            if ($conn->query($sql) === TRUE) {
                echo "New record created successfully";
            } else {
                echo "Error: " . $sql . "<br>" . $conn->error;
            }
            
            $conn->close();
        } else {
            echo "Sorry, there was an error uploading your file.";
        }
    } else {
        echo "File is not an image.";
    }
}
?>