求解数组合并

Array ( [59] =>aa [17] => bb [18] =>cc [69] => dd [21] =>ee [22] => ss [23] => Array ( [0] => 1a[1] =>2a[2] => 3a [3] =>4a [4] => 55 ) [24] =>vv [26] => va [43] => Array ( [0] => 道 [1] =>向 [2] => 圾 [3] => 灯 [4] => 速 [5] => 灯 [6] => 则 ) [53] => 元 [54] => 995 )[1]=>Array ( [59] =>aa [17] => bb [18] =>cc [69] => dd [21] =>ee [22] => ss [23] => Array ( [0] => 1a[1] =>2a[2] => 3a [3] =>4a [4] => 55 ) [24] =>vv [26] => va [43] => Array ( [0] => 道 [1] =>向 [2] => 圾 [3] => 灯 [4] => 速 [5] => 灯 [6] => 则 ) [53] => 元 [54] => 995 )
如何将最后一维合并？
是用foreach遍历时合并吗？如果数据多了会不会卡住？

回复讨论(解决方案)

你所谓的合并是什么意思呢？哪个合并到哪个？

你所谓的合并是什么意思呢？哪个合并到哪个？

Array ( [59] =>aa [17] => bb [18] =>cc [69] => dd [21] =>ee [22] => ss [23] => Array ( [0] => 1a[1] =>2a[2] => 3a [3] =>4a [4] => 55 ) [24] =>vv [26] => va [43] => Array ( [0] => 道 [1] =>向 [2] => 圾 [3] => 灯 [4] => 速 [5] => 灯 [6] => 则 ) [53] => 元 [54] => 995 )[1]=>Array ( [59] =>aa [17] => bb [18] =>cc [69] => dd [21] =>ee [22] => ss [23] => Array ( [0] => 1a[1] =>2a[2] => 3a [3] =>4a [4] => 55 ) [24] =>vv [26] => va [43] => Array ( [0] => 道 [1] =>向 [2] => 圾 [3] => 灯 [4] => 速 [5] => 灯 [6] => 则 ) [53] => 元 [54] => 995 )
合并成例如[23]=>2a,3a,4a,55..........

foreach($arr as $k=>$v){        if(is_array($v)) $arr[$k] = implode(',', $v);}print_r($arr);

foreach($arr as $k=>$v){        if(is_array($v)) $arr[$k] = implode(',', $v);}print_r($arr);

如果是三维数组合并第三维是不是这样

foreach($arr as $k=>$v){foeach($v as $key=>$val){        if(is_array($val)) $v[$key] = implode(',', $val);}}

不一定，需判断 $v 是数组后，方可进入 foeach($v as ...

$v[$key] = implode(',', $val);
改为：
$arr[$k][$key] = implode(',', $val);

且你需要判断一下$v 是数组后才能遍历$v ， 否则会报错。

不一定，需判断 $v 是数组后，方可进入 foeach($v as ...

正如你所说我失败了
array(
[0]=>
array([8]=>aa[9]=> array([77]=>bb[88]=>cc)合并成:bb,cc[10]=>44
)
.................
)
....................
最终实现转成二维数组。。。然后导出excel
最终数组练的让我头痛，还没完全撑握

应该这样写

$a = array(  0 => array(    8 => 'aa',    9 => array(      77 => 'bb',      88 => 'cc',    ),    10 => 44,  ),);$a = dimension_reduction($a); //执行一次降一次维print_r($a);$a = dimension_reduction($a);print_r($a);//降维function dimension_reduction($ar) {  $flag = 1;  foreach($ar as $k=>$v) {    if(is_array($v)) {      $flag = 0;      $ar[$k] = dimension_reduction($v);    }  }  if($flag) return join(',', $ar);  return $ar;}

Array
(
[0] => Array
(
[8] => aa
[9] => bb,cc
[10] => 44
)

)
Array
(
[0] => aa,bb,cc,44
)