1、/*** 给长度计算值*/function feibolaqi($num) {$arr = array();for($i=1;$i<=$num;$i++) {if($i == 1 || $i == 2) {$arr[$i-1] = 1;} else {$arr[$i-1] = $arr[$i-2] + $arr[$i-3];}}return $arr;}print_r(feibolaqi(9));
2、Array( [0] => 1 [1] => 1 [2] => 2 [3] => 3 [4] => 5 [5] => 8 [6] => 13 [7] => 21 [8] => 34)
3、/*** 给值计算长度*/function feibolaqi_val($val){$before = 0;$after = 0;$arr = array();for($i=1;$i<$val;$i++){if($i==1){$before = $i;$arr[]= $i;$after = $before+$after;}else{$before = $after-$before;$after = $before+$after;$arr[]= $after;if($after==$val){$arr['val']= $i;break;}}}return $arr;}print_r(feibolaqi_val(34));
4、Array( [0] => 1 [1] => 1 [2] => 2 [3] => 3 [4] => 5 [5] => 8 [6] => 13 [7] => 21 [8] => 34 [val] => 9)
