PHP採集利器：依据開始字符串和结束字符串截取须要的採集内容数据

function strCutByStr(&$str, $findStart, $findEnd = false, $encoding = 'utf-8'){

        if(is_array($findStart)){

            if(count($findStart) === count($findEnd)){

                foreach($findStart as $k => $v){

                    if(($result = strCutByStr($str, $v, $findEnd[$k], $encoding)) !== false){

                        return $result;

                    }

                }

                return false;

            }else{

                return false;

            }

        }

        if(($start = mb_strpos($str, $findStart, 0, $encoding)) === false){

            return false;

        }

        $start += mb_strlen($findStart, $encoding);

        if($findEnd === false){

            return mb_substr($str, $start, NULL, $encoding);

        }

        if(($length = mb_strpos($str, $findEnd, $start, $encoding)) === false){

            return false;

        }

        return mb_substr($str, $start, $length - $start, $encoding);

    }

举例：

$str = '1那是一场23我问问4567890维稳';

echo (strCutByStr($str, '那是', '稳'));//输出 一场23我问问4567890维