Standardisieren ein mehrdimensionales Array in PHP

Question

Ich habe ein mehrdimensionales Array wie diese

Array 
(
[0] => Array 
    (
     ['key-A'] => 'val1' 
     ['key-B'] => 'val2' 
    ) 
[1] => Array 
    (
     ['key-A'] => 'val3' 
     ['key-C'] => 'val4' 
    ) 
[2] => Array 
    (
     ['key-B'] => 'val5' 
     ['key-C'] => 'val6' 
    ) 
) 

Wie würde ich ändern, um dies in ein mehrdimensionales Array, das so standardisiert ist, dass alle Schlüssel vorhanden waren und ein Nullwert eingegeben, wenn der Schlüssel war nicht anwesend?

z.

Array 
(
[0] => Array 
    (
     ['key-A'] => 'val1' 
     ['key-B'] => 'val2' 
     ['key-C'] => null 
    ) 
[1] => Array 
    (
     ['key-A'] => 'val3' 
     ['key-B'] => null 
     ['key-C'] => 'val4' 
    ) 
[2] => Array 
    (
     ['key-A'] => null 
     ['key-B'] => 'val5' 
     ['key-C'] => 'val6' 
    ) 
) 

Answer 1

<?php 
$arrays = [ 
    [ 
     'key-A' => 'val1', 
     'key-B' => 'val2', 
    ], 
    [ 
     'key-A' => 'val3', 
     'key-C' => 'val4', 
    ], 
    [ 
     'key-B' => 'val5', 
     'key-C' => 'val6', 
    ], 
]; 

// First build up a single array containing all the keys present 
$allKeys = []; 

foreach ($arrays as $array) 
{ 
    $allKeys = array_unique(array_merge(array_keys($array), $allKeys)); 
} 

// Then loop over the original array, merging the existing values into an array 
// containing all the known keys 
foreach ($arrays as &$array) 
{ 
    $array = array_merge(array_combine(
     $allKeys, 
     array_fill(0, count($allKeys), null) 
    ), $array); 
} 

print_r($arrays); 

Answer 2

$array = array(
    [0] => array(
       ['key-A'] => 'val1' 
       ['key-B'] => 'val2' 
       ['key-C'] => null 
      ) 
    [1] => array(
       ['key-A'] => 'val3' 
       ['key-B'] => null 
       ['key-C'] => 'val4' 
      ) 
    [2] => array(
       ['key-A'] => null 
       ['key-B'] => 'val5' 
       ['key-C'] => 'val6' 
      )); 

Answer 3

<?php 

$input_array = [ 
    [ 
     "foo" => 1, 
     "bar" => 2 
    ], 
    [ 
     "baq" => 3, 
     "baz" => 4 
    ] 
]; 

$unique = []; 

foreach ($input_array as $row){ 
    foreach ($row as $k => $v){ 
     $unique[$k] = true; 
    } 
} 

foreach ($input_array as $iak => $row){ 
    foreach ($unique as $k => $v){ 
     if (!isset($row[$k])){ 
      $input_array[$iak][$k] = null; 
     } 
    } 
} 

var_dump($input_array); 

Answer 4

Sie können mit PHP [array_fill] [1]

[1]: http://php.net/manual/en/function.array-fill.php Funktion

$arr = array_fill(0, num_of_items_you_need, array(
      'A' => null, 
      'B' => null, 
      'C' => null 
     ) 
     ); 
//now you have null as default 

Answer 5

versuchen, dies mit Array Schlüsselfunktion vorhanden

<?php 

$ss= Array 
(
'0' => Array 
(
    'key-A' => 'val1', 
    'key-B' => 'val2' 
), 
'1' => Array 
(
    'key-A' => 'val3', 
    'key-C' => 'val4' 
), 
'2' => Array 
(
    'key-B' => 'val5', 
    'key-C' => 'val6' 
) 
); 

    print_r($ss); 

foreach($ss as $key=>$row) 
    { 

if(!array_key_exists('key-A',$row)) 
{ 

    $ss[$key]['key-A']='null'; 

} 

if(!array_key_exists('key-B',$row)) 
{ 

    $ss[$key]['key-B']='null'; 

} 

if(!array_key_exists('key-C',$row)) 
{ 

    $ss[$key]['key-C']='null'; 

} 



    } 

echo "<PRE>"; 
print_r($ss); 

Answer 6

diesem Code

$ss= Array 
(
'0' => Array 
(
    'key-A' => 'val1', 
    'key-B' => 'val2' 
), 
'1' => Array 
(
    'key-A' => 'val3', 
    'key-C' => 'val4' 
), 
'2' => Array 
(
    'key-B' => 'val5', 
    'key-C' => 'val6' 
) 
); 


$key = array("A","B","C"); 
$var = array(); 
foreach($ss as $k => $v) 
{ 
    foreach($key as $v2) 
    { 
     $var[$k]["key-{$v2}"] = isset($v["key-{$v2}"]) ? $v["key-{$v2}"] : "null"; 
    } 
} 

print_r($var); 

Sie erhalten folgendes Ergebnis Versuchen:

Array 
(
    [0] => Array 
     (
      [key-A] => val1 
      [key-B] => val2 
      [key-C] => null 
     ) 

    [1] => Array 
     (
      [key-A] => val3 
      [key-B] => null 
      [key-C] => val4 
     ) 

    [2] => Array 
     (
      [key-A] => null 
      [key-B] => val5 
      [key-C] => val6 
     ) 

)