去除html标签 php

function my_html($string,$sublen =80){
    $string = strip_tags($string);
    $string = preg_replace ('/
/is', '', $string);
    $string = preg_replace ('/ |　/is', '', $string);
    $string = preg_replace ('/ /is', '', $string);

    preg_match_all("/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/", $string, $t_string);
    if(count($t_string[0]) - 0 > $sublen) $string = join('', array_slice($t_string[0], 0, $sublen))."…";
    $string = join('', array_slice($t_string[0], 0, $sublen));
    return $string;

}