php如何实现文件上传

1、创建表单和file类型的input并将表单属性“enctype”设置为“multipart/form-data”；

<form action="./upload_file.php" method="post" enctype="multipart/form-data">    <input type="file" name="upfile">    <button type="submit">上传</button></form>

2、在php程序中通过“move_uploaded_file”函数将提交的文件进行保存即可。

$filename = $file_tmp = $_FILES['upfile']['name'];$file_tmp = $_FILES['upfile']['tmp_name'];move_uploaded_file($file_tmp, 'Uploads/' . $filename);