Heim > Artikel > Backend-Entwicklung > 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?
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?
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);
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 ...
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