如何用html和php上传图片？

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

<?php
if(isset($_FILES['image'])){
  $file_name = $_FILES['image']['name'];
  $file_tmp = $_FILES['image']['tmp_name'];
  $file_ext = strtolower(end(explode('.', $file_name)));
  
  // 检查文件类型和大小等验证步骤
  
  $upload_path = 'uploads/' . $file_name;
  
  if(move_uploaded_file($file_tmp, $upload_path)){
    echo "图片上传成功！";
  }else{
    echo "图片上传失败！";
  }
}
?>