```php /** * 清除html标签 * @author TechLee */ function clear_tags($str) { $str = strip_tags($str); //首先去掉头尾空格 $str = trim($str); $str = preg_replace("/(\s|\&nbsp\;|　|\xc2\xa0)/", "", strip_tags($str)); //接着去掉两个空格以上的 $str = preg_replace('/\s(?=\s)/', '', $str); //最后将非空格替换为一个空格 $str = preg_replace('/[\n\r\t]/', ' ', $str); return $str; } /** * 清除html标签，字符串截取 * 支持中文 * @author TechLee */ function substr_cn($str, $length = 0, $start = 0, $charset = "utf-8", $suffix = true) { $str = clear_tags($str); if (function_exists("mb_substr")) { if ($length > 0 && mb_strlen($str, $charset) <= $length) { return $str; } $slice = $length > 0 ? mb_substr($str, $start, $length, $charset) : $str; } else { $re['utf-8'] = "/[\x01-]|[�-�][�-�]|[�-�][�-�]{2}|[�-�][�-�]{3}/"; $re['gb2312'] = "/[\x01-]|[�-�][�-�]/"; $re['gbk'] = "/[\x01-]|[�-�][@-�]/"; $re['big5'] = "/[\x01-]|[�-�]([@-~]|�-�])/"; preg_match_all($re[$charset], $str, $match); if ($length > 0 && count($match[0]) <= $length) { return $str; } $slice = join("", $length > 0 ? array_slice($match[0], $start, $length) : $match[0]); } if ($suffix) { return $slice . "…"; } return $slice; } ```