multi-dimensional array in php - php

Question

$array = array(
array(
'id' => 1,
'sht' => 'L',
'tm' => 'tttt'
),
array(
'id' => 7,
'tm' => 'xyz'
),
array(
'id' => 12,
'hand' => 'R'
),
array(
'id' => 20
)
);
$id = array_column($array, "id");
//Getting this result
Array
(
[0] => 1
[1] => 7
[2] => 12
[3] => 20
)
//Expecting like this
Array (
[id] => Array (
[H] => 1
[S] => 7
[F] => 12
[G] => 20
),
[sht] => Array (
[H] => L
[S] => ''
[F] => ''
[G] => ''
)
[tm] => Array (
[H] => tttt
[S] => xyz
[F] => ''
[G] => ''
)
[hand] => Array (
[H] => ''
[S] => ''
[F] => R
[G] => ''
)
)
I do not wish you keep indexing like 0,1,2,3 i want to put indexing like H,S,F,G how can i put it the same into my query please suggest
Also explain how key behave how can we set our defined key instead 0,1

Answer 1

Online Demo
check this code
$array = array(
array(
'id' => 1,
'sht' => 'L',
'tm' => 'tttt'
),
array(
'id' => 7,
'tm' => 'xyz'
),
array(
'id' => 12,
'hand' => 'R'
),
array(
'id' => 20
)
);
$newKey=array("H","S","F","G");
//Get Key list
$keyList=array();
foreach($array as $key=>$value){
foreach($value as $key2=>$value2){
if(!in_array($key2,$keyList))
$keyList[]=$key2;
}
}
//===========
$result=array();
$i=0;
foreach($array as $key=>$value){
//add '' if key does not exist
foreach($keyList as $k){
if(!array_key_exists($k,$value))
$value[$k]='';
}
//=============================
//add to new array with letter key($newkey)
foreach($value as $key2=>$value2){
$result[$key2][$newKey[$i]]=$value2;
}
//=========================================
$i++;
}