how to solve Array merge for json in this example? - php

Question

I parse Excel sheet and get this JSON:
[
{
"A":"Samsung",
"Groupe":{
"F":"TV",
"D":"HDR"
}
},
{
"A":null,
"Groupe":{
"F":null,
"D":null
}
},
{
"A":"Sony",
"Groupe":{
"F":"T.V",
"D":"LCD"
}
},
{
"A":"Sony",
"Groupe":{
"F":"PS4",
"D":"Pro edition"
}
},
{
"A":"Sony",
"Groupe":{
"F":"Smart Phone",
"D":"Quad core"
}
}
]
Php code:
$data = [];
for ($row = 15; $row <= 25; $row++) {
$data[] = [
'A' => $worksheet->getCell('A'.$row)->getValue(),
'Groupe' => [
'F' => $worksheet->getCell('F'.$row)->getValue(),
'D' => $worksheet->getCell('D'.$row)->getValue()
]
];
}
How can I organize(sort) json depending on "A"?
I tried this but I still couldn't merge "Groupe" for same "A" together:
Take away NULL colomns.
Create a copy of the Array.
Regroup fields for same element in the new Array(this didnt work)
Code:
$data1 = [];
for ($l = 0; $l < count($data); $l++){
$data1[$l] = $data[$l];
}
for ($j = 0; $j < count($data); $j++) {
if($data[$j]['A'] != NULL){
if($data[$j]['A'] !== $data[$j+1]['A']){
$data1[$j] = $data[$j];
}
else{
$data1[$j]['A']= $data[$j]['A'];
$data1[$j]['Groupe']= array_merge($data[$j]['Groupe'], $data[$j+1]['Groupe']);
}
}
}
EDIT:
The result that I'm getting for $data1 is exactly the same as the input JSON(except that NULL was deleted), so it looks like merge Array didnt work and what I need is:
[
{
"A":"Samsung",
"Groupe":{
"F":"TV",
"D":"HDR"
}
},
{
"A":"Sony",
"Groupe": [{
"F":"T.V",
"D":"LCD"
},{
"F":"PS4",
"D":"Pro edition"
}, {"F":"Smart Phone",
"D":"Quad core"
}]
}]
Plus it's showing me this :
Notice: Undefined offset: 11 in C:\xampp\htdocs\phptoexcel.php on line
43
Line 43: if($data[$j]['A'] !== $data[$j+1]['A']){

Answer 1

Use the A value as key in $data, so you can group by it:
$data = [];
for ($row = 15; $row <= 25; $row++) {
//get A value, skip if A = NULL
$a = $worksheet->getCell('A'.$row)->getValue(),
if($a===NULL)continue;
//get F and D VALUE, skip if one of them = NULL
$f = $worksheet->getCell('F'.$row)->getValue();
$d = $worksheet->getCell('D'.$row)->getValue();
if($f===null || $d===null)continue;
//test if A is a key in $data. If not, create
if(!array_key_exist( $a, $data ){
$data[$a]=[
'A'=>$a,
'Groupe'=>[]
];
}
//Put F and D in a new array in Groupe
$data[$a]['Groupe'][]=["F"=>$f,"D"=>$d];
}
You will end up with:
$data=>
[ "Samsung" =>[ "A" => "Samsung",
"Groupe" => [ 0 =>[ "F" => "TV",
"D" => "HDR"
]
]
],
"Sony" => [ "A" => "Sony",
"Groupe" => [ 0 =>[ "F":"TV",
"D":"HDR"
],
1 =>[ "F":"T.V",
"D":"LCD"
],
2 =>[ "F":"PS4",
"D":"Pro edition"
],
3 =>[ "F":"Smart Phone",
"D":"Quad core"
],
]
]

Answer 2

Try This
$arrUnique = array();
$result = array();
$i=0;
foreach($data as $value){
if($value['A']!=null){
$data1 = [];
$intID = $value['A'];
if( in_array( $intID, $arrUnique ) ) {
$key = array_search ($intID, $arrUnique);
$result[$key]['Groupe'][] = $value['Groupe'];
}else{
$data1['A'] = $value['A'];
$data1['Groupe'][] = $value['Groupe'];
$result[$i]=$data1;
$arrUnique[]=$value['A'];
$i++;
}
}
}

Answer 3

I usually don't perform JSON to JSON transformation using PHP but using jq command line utility.
Given your input JSON file, you can use this jq filter:
jq '[[sort_by(.A)|.[]|select(.A!=null)]|group_by(.A)|.[]as $i|{A:$i[].A,Groupe:$i|map(.Groupe)}]|unique' file
[
{
"A": "Samsung",
"Groupe": [
{
"F": "TV",
"D": "HDR"
}
]
},
{
"A": "Sony",
"Groupe": [
{
"F": "T.V",
"D": "LCD"
},
{
"F": "PS4",
"D": "Pro edition"
},
{
"F": "Smart Phone",
"D": "Quad core"
}
]
}
]