截取指定区间字符串.txt

private function get_between($str,$start = '',$end = '') {
        $start = html_entity_decode($start);
        $end = html_entity_decode($end);
        $s1 = strstr($str,$start);
        $str = $s1 ? $s1 : $str;
        $e_leng = strpos($str,$end);
        $str = substr($str,0,$e_leng);
        $str = str_replace($start,'',$str);
        return trim($str);
    }