<?php


/**
 * Plugin Name: Hash Filename
 * Plugin URI:  goodao.cn
 * Description: goodao.cn
 * Version: 1.0
 * Author: goodao.cn
 * Author URI: http://www.goodao.cn/
 * License: goodao.cn
 * License URI: goodao.cn 
 */
if ( ! defined( 'ABSPATH' ) ) exit;

//过滤中文字符
function make_filename_hash($filename) {
	if(!preg_match("/^[A-Za-z0-9`~!@#$%^&*()_\-+=<>?:{}|,.\/;'\\[\]·]+$/u",$filename)){
		$info = pathinfo($filename);
		$ext  = empty($info['extension']) ? '' : '.' . $info['extension'];
		$name = basename($filename, $ext);
		return substr(md5($name),6,8) . $ext;
	}else{
		return $filename;
	}
}
add_filter('sanitize_file_name', 'make_filename_hash', 10);