$pattern_pre50="/.{".$hang_zifu_number ."}/";
preg_match_all($pattern_pre50,$workstr,$matches);
$temp=$matches[0][0];
if ((check_last($temp)==1)and(check_en_num($temp)==1)) // ji shu and chinese
{
$hang_zifu_shortone=$hang_zifu_number-1;
$pattern_replace="/^.{".$hang_zifu_shortone ."}/";
$replacement='';
$arr_phone[$i]=preg_replace($pattern_replace,$replacement,$workstr);
// 前面49个处理完!
$temp=short_one($temp); //从50个中减去一个.
}