如何提取特定区间内的文本内容为.txt文件？

本文共计84个文字，预计阅读时间需要1分钟。

php获取指定区间字符的函数：phpprivate function get_between($str, $start, $end) { $start=_entity_decode($start); $end=_entity_decode($end); $s1=strpos($str, $start); $str=$s1 ? substr($str, $s1) : $str; $e_leng=strpos($str, $end); return $e_leng ? substr($str, 0, $e_leng) : '';}

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); }