how to decode a json string and add to array in PHP - php

Question

I have a few records from database and I fetched all records. The array return as the code below
array (size=10)
0 =>
array (size=5)
'id' => string '1' (length=1)
'type' => string 'group' (length=5)
'members' => null
'parents' => string '0' (length=1)
'level' => string '1' (length=1)
1 =>
array (size=5)
'id' => string '2' (length=1)
'type' => string 'group' (length=5)
'members' => null
'parents' => string '0' (length=1)
'level' => string '1' (length=1)
2 =>
array (size=5)
'id' => string '3' (length=1)
'type' => string 'team' (length=4)
'members' => string '["3","5","6"]' (length=13)
'parents' => string '1' (length=1)
'level' => string '2' (length=1)
3 =>
array (size=5)
'id' => string '4' (length=1)
'type' => string 'team' (length=4)
'members' => string '["1"]' (length=5)
'parents' => string '1' (length=1)
'level' => string '2' (length=1)
4 =>
array (size=5)
'id' => string '5' (length=1)
'type' => string 'group' (length=5)
'members' => null
'parents' => string '1' (length=1)
'level' => string '2' (length=1)
5 =>
array (size=5)
'id' => string '8' (length=1)
'type' => string 'team' (length=4)
'members' => string '["4"]' (length=5)
'parents' => string '5' (length=1)
'level' => string '3' (length=1)
6 =>
array (size=5)
'id' => string '9' (length=1)
'type' => string 'team' (length=4)
'members' => string '["2"]' (length=5)
'parents' => string '5' (length=1)
'level' => string '3' (length=1)
7 =>
array (size=5)
'id' => string '10' (length=2)
'type' => string 'team' (length=4)
'members' => null
'parents' => string '5' (length=1)
'level' => string '3' (length=1)
8 =>
array (size=5)
'id' => string '11' (length=2)
'type' => string 'team' (length=4)
'members' => null
'parents' => string '5' (length=1)
'level' => string '3' (length=1)
9 =>
array (size=5)
'id' => string '12' (length=2)
'type' => string 'group' (length=5)
'members' => null
'parents' => string '1' (length=1)
'level' => string '2' (length=1)
the members field has been encoded as json string. I want to build a array with format as the code below
array('1'=>array(1,2,3,4,5,6),
'2'=>array(),
'3'=>array(3,5,6),
'4'=>array(1),
'5'=>array(2,4),
'8'=>array(4),
'9'=>array(2))
The record's id will be key of array and the members has decoded will become the value. I wrote a function handle the array return from the database but the result not as my intention. This is my code
$results = mysql_query('select id,type,members,parents,level from team');
$array = array();
recursiveDate($results,0,$array);
function recursiveData($sourceArr,$parents = 0, &$newMenu){
if(count($sourceArr)>0){
foreach ($sourceArr as $key => $value){
if($value['parents'] == $parents){
if(isset($newMenu[$value['id']])){
$newMenu[$value['id']] = array();
}
$newMenu[$value['id']] = $value['members']?json_decode($value['members']):array();
if(isset($newMenu[$parents])){
$newMenu[$parents] = array_merge($newMenu[$value['id']],$newMenu[$parents]);
}
$newParents = $value['id'];
unset($sourceArr[$key]);
$this->recursiveData($sourceArr,$newParents, $newMenu);
}
}
}
}
And this is the array after handled
array (size=10)
1 =>
array (size=4)
0 => string '1' (length=1)
1 => string '3' (length=1)
2 => string '5' (length=1)
3 => string '6' (length=1)
3 =>
array (size=3)
0 => string '3' (length=1)
1 => string '5' (length=1)
2 => string '6' (length=1)
4 =>
array (size=1)
0 => string '1' (length=1)
5 =>
array (size=2)
0 => string '2' (length=1)
1 => string '4' (length=1)
8 =>
array (size=1)
0 => string '4' (length=1)
9 =>
array (size=1)
0 => string '2' (length=1)
10 =>
array (size=0)
empty
11 =>
array (size=0)
empty
12 =>
array (size=0)
empty
2 =>
array (size=0)
empty
Please help me build that array

Answer 1

I quickly wrote this so not sure if it's exactly what you're looking for, looks like you over complicated it hugely though. I kept the original result structure incase you wanted that but you can easily overwrite it if you wish.
function modifyData($data = array()) {
foreach($data as &$entry) {
if(!empty($entry['members'])) {
$entry['members'] = json_decode($entry['members'], true);
} else {
$entry['members'] = array();
}
}
return $data;
}
I tested this with
$data = array(
array(
'id' =>'1',
'type' =>'group',
'members' => null,
'parents' =>'0',
'level' =>'1'
),
array(
'id' =>'1',
'type' =>'group',
'members' => '["3","5","6"]',
'parents' =>'0',
'level' =>'1'
),
array(
'id' =>'1',
'type' =>'group',
'members' => '["3"]',
'parents' =>'0',
'level' =>'1'
)
);
And the output is
array (size=3)
0 =>
array (size=5)
'id' => string '1' (length=1)
'type' => string 'group' (length=5)
'members' =>
array (size=0)
empty
'parents' => string '0' (length=1)
'level' => string '1' (length=1)
1 =>
array (size=5)
'id' => string '1' (length=1)
'type' => string 'group' (length=5)
'members' =>
array (size=3)
0 => string '3' (length=1)
1 => string '5' (length=1)
2 => string '6' (length=1)
'parents' => string '0' (length=1)
'level' => string '1' (length=1)
2 =>
array (size=5)
'id' => string '1' (length=1)
'type' => string 'group' (length=5)
'members' =>
array (size=1)
0 => string '3' (length=1)
'parents' => string '0' (length=1)
'level' => string '1' (length=1)