WordPress 添加媒体自动重命名方法(函数)

添加媒体自动按日期重命名：

function rename_wp_handle_upload_prefilter($file){
$time=date("Y-m-d");
$file['name'] = $time."".mt_rand(1,100).".".pathinfo($file['name'] , PATHINFO_EXTENSION);
return $file;
}
add_filter('wp_handle_upload_prefilter', 'rename_wp_handle_upload_prefilter');

添加媒体自动按 Hash 重命名：

function make_filename_hash($filename) {
    $info = pathinfo($filename);
    $ext  = empty($info['extension']) ? '' : '.' . $info['extension'];
    $name = basename($filename, $ext);
    return md5($name) . $ext;
}
add_filter('sanitize_file_name', 'make_filename_hash', 10);