Question

我有一个三维数组。我想右边的函数将它转换为单维数组并保留前一个子键。我该怎么做？

array(2) {
[0]=>
 array(2) {
  [0]=>
   array(2) {
     ["id"]=>
     string(1) "4"
     ["assignedlessons"]=>
     string(2) "69"
   }
  [1]=>
   array(2) {
     ["id"]=>
     string(1) "4"
     ["assignedlessons"]=>
     string(3) "308"
   }
}
array(2) {
  [0]=>
   array(2) {
     ["id"]=>
     string(1) "10"
     ["assignedlessons"]=>
     string(2) "50"
   }
  [1]=>
   array(2) {
     ["id"]=>
     string(1) "10"
     ["assignedlessons"]=>
     string(2) "91"
    }
  }
}

我想把它转换成像这样的结构：

   array(0) {
     ["id"]=>
     string(1) "4"
     ["assignedlessons"]=>
     string(2) "69"
   }

   array(1) {
     ["id"]=>
     string(1) "4"
     ["assignedlessons"]=>
     string(3) "308"
   }

   array(2) {
     ["id"]=>
     string(1) "10"
     ["assignedlessons"]=>
     string(2) "50"
   }
   array(3) {
     ["id"]=>
     string(1) "10"
     ["assignedlessons"]=>
     string(2) "91"
    }

我有这个功能：

function toSingleDimentionalArray($array){
 $final = array();
 foreach($array as $value){
   foreach($array as $key => $val){
      $final[]['id'] = $val['id'];  
      $final[]['assignedlessons'] = $val['assignedlessons'];
    }

 }
 return $final;
}

但它只返回这样的东西：

array(19648) {
  [0]=>
  array(1) {
  ["id"]=>
 string(1) "4"
}
  [1]=>
  array(1) {
  ["assignedlessons"]=>
  string(2) "69"
}
  [2]=>
  array(1) {
  ["id"]=>
  string(1) "4"
}
  [3]=>
  array(1) {
  ["assignedlessons"]=>
  string(3) "308"
 }

Answer 1

这将有效

function toNotActuallyASingleDimensionalArray($array) {
    $final = array();
    foreach($array as $subarray) {
        foreach($subarray as $val) {
            $final[] = $val;
        }
    }
    return $final;
}

Answer 2

$final_array = array();

foreach($array as $sub_array)
{
  foreach($sub_array as $temp_array)
  {
    $final_array[] = $temp_array;
  }
}

Answer 3

function simplify_array($array, $first_level=true) {
    foreach($array as $key => $value) {
        $last_level = !is_array($value);
        if($last_level) {
            return $array;
        }else if($first_level) {
            $return[] = simplify_array($value, false);
        }else{
            return simplify_array($value, false);
        }
    }
    return $return;
}


print_r(simplify_array($arr));

HTH

它适用于n维数组

如何将三维数组更改为一维数组（PHP）

3 个答案: