how to get first key (0 or associative ) form array and output in new array

Question

I Would Like To Get The First Element Of This Array And Put In New Same Array Output

One Requirement: It Cannot Be Done With Passing By reference Index eg 0

This Input Array

        [ 'id','ID','dt-text' ] ,
        [ 'name','Name','dt-text' ] ,
        [ 'artistList'=>['list','mm','defalut']  ,'Artist List','dt-select'] ,
        [ 'nationality'=>['nationality','mm','defalut']  ,'Nationality','dt-select'] ,
        [ 'view','View',''],
        [ 'status','Status' ,'']

array:6 [▼
  0 => array:3 [▼
        0 => "id"
        1 => "ID"
        2 => "dt-text"
  ]
  1 => array:3 [▼
        0 => "name"
        1 => "Name"
        2 => "dt-text"
  ]
  2 => array:3 [▼
        "artistList" => array:3 [▼
              0 => "list"
              1 => "mm"
              2 => "defalut"
        ]
        0 => "Artist List"
        1 => "dt-select"
  ]
  3 => array:3 [▼
        "nationality" => array:3 [▼
              0 => "nationality"
              1 => "mm"
              2 => "defalut"
        ]
        0 => "Nationality"
        1 => "dt-select"
  ]
  4 => array:3 [▼
        0 => "view"
        1 => "View"
        2 => ""
  ]
  5 => array:3 [▼
        0 => "status"
        1 => "Status"
        2 => ""
  ]
]

The New Array I Needed

This IS OutPUT Array

['id','name','artistList'=>['list','mm','defalut'] ,'nationality'=>['nationality','mm','defalut'] ,'view','status']
array:6 [▼
    0 => "id"
    1 => "name"
    "artistList" => array:3 [▼
                0 => "list"
                1 => "mm"
                2 => "defalut"
                ]
    "nationality" => array:3 [▼
                0 => "nationality"
                1 => "mm"
                2 => "defalut"
                ]
    2 => "view"
    3 => "status"
]

Note I Can Controll in Input Array Same , I Try with foreach in php And Tray In Laravel Helper Function head Put I get S

array:6 [▼
  0 => "id"
  1 => "name"
  2 => array:1 [▼
    "artistList" => array:3 [▼
      0 => "list"
      1 => "mm"
      2 => "defalut"
    ]
  ]
  3 => array:1 [▼
    "nationality" => array:3 [▼
      0 => "nationality"
      1 => "mm"
      2 => "defalut"
    ]
  ]
  4 => "view"
  5 => "status"
]

Put I Cant Get Resslut So , How Can I Do this?

I don't completely understand your requirement. Do you want a new array as output, or overwrite the old array. Why can't you pass by reference? Can you use reference in the foreach? — Nick
– Nick, Commented May 27, 2019 at 2:53
yes i want array same output ['id','name','artistList'=>['list','mm','defalut'] ,'nationality'=>['nationality','mm','defalut'] ,'view','status'] "reference" i mean in some array number 0 is associative i hope you understand me i am soory for bad english — xpredo
– xpredo, Commented May 27, 2019 at 2:58
Your shift button is being excessively used. It becomes hard to read — Andreas
– Andreas, Commented May 27, 2019 at 3:10
@Nick I need reslut same as ['id','name','artistList'=>['list','mm','defalut'] ,'nationality'=>['nationality','mm','defalut'] ,'view','status'] array:6 [▼ 0 => "id" 1 => "name" "artistList" => array:3 [▼ 0 => "list" 1 => "mm" 2 => "defalut" ] "nationality" => array:3 [▼ 0 => "nationality" 1 => "mm" 2 => "defalut" ] 2 => "view" 3 => "status" ] — xpredo
– xpredo, Commented May 27, 2019 at 3:17

Nick · Accepted Answer · 2019-05-27 03:19:00Z

Since you are changing the keys (structure) of the array, there is no way to do that without either generating a new array or passing the array by reference. One way to do it by generating a new array is with array_reduce:

$array = [
        [ 'id','ID','dt-text' ] ,
        [ 'name','Name','dt-text' ] ,
        [ 'artistList'=>['list','mm','defalut']  ,'Artist List','dt-select'] ,
        [ 'nationality'=>['nationality','mm','defalut']  ,'Nationality','dt-select'] ,
        [ 'view','View',''],
        [ 'status','Status' ,'']
    ];
$array = array_reduce($array, function ($c, $v) { 
    $first_key = array_keys($v)[0];
    return array_merge($c, array($first_key => $v[$first_key])); }, []);
print_r($array);

Output:

Array (
  [0] => id
  [1] => name
  [artistList] => Array (
    [0] => list
    [1] => mm
    [2] => defalut
  )
  [nationality] => Array (
    [0] => nationality
    [1] => mm
    [2] => defalut
  )
  [2] => view
  [3] => status
)

Demo on 3v4l.org

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