php图片本地化 加后缀

<?php
if ($_FILES['file']['error'] == UPLOAD_ERR_OK) {
    $tmp_name = $_FILES['file']['tmp_name'];
    $name = basename($_FILES['file']['name']);
    $ext = pathinfo($name, PATHINFO_EXTENSION);
    
    if (empty($ext)) {
        // 如果没有后缀名，可以根据MIME类型添加
        $finfo = finfo_open(FILEINFO_MIME_TYPE);
        $mime = finfo_file($finfo, $tmp_name);
        finfo_close($finfo);
        
        switch ($mime) {
            case 'image/jpeg':
                $ext = 'jpg';
                break;
            case 'image/png':
                $ext = 'png';
                break;
            case 'image/gif':
                $ext = 'gif';
                break;
            // 可以添加更多MIME类型
        }
    }
    
    $new_name = uniqid() . '.' . $ext;
    $save_path = 'uploads/' . $new_name;
    
    if (move_uploaded_file($tmp_name, $save_path)) {
        echo "图片上传成功，保存路径：" . $save_path;
    } else {
        echo "图片上传失败";
    }
} else {
    echo "上传错误：" . $_FILES['file']['error'];
}
?>