重命名和覆盖上传的文件 [英] Rename and overwrite uploaded files

问题描述

我使用以下代码将图片上传到 Wordpress

I use the following code to upload images to Wordpress

function custom_upload_name($filename)
{
  $info = pathinfo($filename);

 $item_id = $_POST['item_id'];    
  $filename  =  $item_id . '.jpg';
     return $filename;
 }

add_filter('sanitize_file_name', 'custom_upload_name', 10);

if ( ! function_exists( 'wp_handle_upload' ) ) require_once( ABSPATH . 'wp-admin/includes/file.php' );
 $item_id = $_POST['item_id'];
$uploadedfile = $_FILES['file'];
  $image_name = $item_id;
$upload_overrides = array( 'test_form' => false );
$movefile = wp_handle_upload( $uploadedfile, $upload_overrides );
if ( $movefile ) {
    //file is uploaded successfully. do next steps here.
      echo $location_home .'/images/' .$image_name . '.jpg';  
}

文件的重命名工作正常.但是我选择同一张图片两次上传一切都很好，但是如果我选择了不同的图片来上传，Wordpress 会自动在文件中添加一个数字:

The renaming of the files works correctly. But I select the same image twice to upload everything is fine, but if I select a different image to upload, Wordpress automatically adds an number to the file:

• 第一次上传的结果:10000.jpg
• 第二次上传的结果(相同的文件，相同的 ID):100001.jpg
• 第三次上传的结果(相同的文件，相同的 ID):1000012.jpg

如何让 Wordpress 自动覆盖具有相同 id 的文件，而不会给文件添加额外的数字?

How to let Wordpress automatically overwrite the files with the same id, without adding extra numbers to the file?

推荐答案

使用这段代码，unique_filename_callback是回调函数，这个函数是wordpress自动调用的.所以我们可以覆盖同名的文件.

Use this code, unique_filename_callback is call back function, this function automatically called by wordpress. So we can overwrite the files with same name.

$upload_overrides = array( 'test_form' => false,'unique_filename_callback' => 'my_cust_filename' );

// You codes

function my_cust_filename($dir, $name, $ext){
    return $name.$ext;
}

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