/*Auto cut article*/
$size = 336;    //Bytes
$more_link_text = '[Read more...]';
add_action('the_content', 'control_content_size');
function control_content_size($content) {
    global $size, $more_link_text;
    if (is_singular()) return $content;
    $content = strip_tags($content);
    $content = cut_str($content, $size);
    $content = '<p>' . $content . '</p><p><a href="' . get_permalink() . "\" class=\"more-link\">$more_link_text</a></p>";
    return $content;
}

/* Cut string*/
function cut_str($str, $len) {
    if (!isset($str[$len])) {
    } else {
        if (seems_utf8($str[$len-1]))
            $str = substr($str, 0, $len)."...";
        else {
            if(seems_utf8($str[$len-3].$str[$len-2].$str[$len-1]))
                $str = substr($str, 0, $len-3) . $str[$len-3] . $str[$len-2] . $str[$len-1] ."...";
            elseif(seems_utf8($str[$len-2].$str[$len-1].$str[$len]))
                $str = substr($str, 0, $len-2) . $str[$len-2].$str[$len-1].$str[$len]."...";
            elseif(seems_utf8($str[$len-1].$str[$len].$str[$len+1]))
                $str = substr($str, 0, $len-1) . $str[$len-1].$str[$len].$str[$len+1]."...";
            else
                $str = substr($str, 0, $len)."...";
        }
    }
    return $str;
}

function cut_str($string, $sublen, $start = 0, $code = 'UTF-8'){
    if($code == 'UTF-8'){
        $pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
        preg_match_all($pa, $string, $t_string);
        if(count($t_string[0]) - $start > $sublen) return join('', array_slice($t_string[0], $start, $sublen))."...";
        return join('', array_slice($t_string[0], $start, $sublen));}
    else{
        $start = $start*2;
        $sublen = $sublen*2;
        $strlen = strlen($string);
        $tmpstr = '';
        for($i=0; $i<$strlen; $i++){
            if($i>=$start && $i<($start+$sublen)){
                if(ord(substr($string, $i, 1))>129) $tmpstr.= substr($string, $i, 2);
            else $tmpstr.= substr($string, $i, 1);}
            if(ord(substr($string, $i, 1))>129) $i++;}
            if(strlen($tmpstr)<$strlen ) $tmpstr.= "...";
        return $tmpstr;
    }
}