Wordpress Excerpt Filter for Chinese Text

functions.php

<?php

function ellipsis($text, $max=100, $append='&hellip;&hellip;'){
  if (strlen($text) <= $max) return $text;
  $text = strip_shortcodes($text);
  $text = strip_tags($text);
  $out = mb_substr($text,0,$max);
  if (strpos($text,' ') === FALSE) return $out.$append;
  return preg_replace('/\w+$/','',$out).$append;
}

add_filter('get_the_excerpt', 'chinese_excerpt_filter');

function chinese_excerpt_filter($excerpt){
  if (function_exists('icl_get_languages')) {
    if (ICL_LANGUAGE_CODE == 'zh_CN') {
      $excerpt = ellipsis($excerpt, 150);
    }
  }

  return $excerpt;
}