How retrieve specific duplicate array values with PHP - php

Question

$array = array(
array(
'id' => 1,
'name' => 'John Doe',
'upline' => 0
),
array(
'id' => 2,
'name' => 'Jerry Maxwell',
'upline' => 1
),
array(
'id' => 3,
'name' => 'Roseann Solano',
'upline' => 1
),
array(
'id' => 4,
'name' => 'Joshua Doe',
'upline' => 1
),
array(
'id' => 5,
'name' => 'Ford Maxwell',
'upline' => 1
),
array(
'id' => 6,
'name' => 'Ryan Solano',
'upline' => 1
),
array(
'id' =>7,
'name' => 'John Mayer',
'upline' => 3
),
);
I want to make a function like:
function get_downline($userid,$users_array){
}
Then i want to return an array of all the user's upline key with the value as $userid. I hope anyone can help. Please please...

Answer 1

You could do it with a simple loop, but let's use this opportunity to demonstrate PHP 5.3 anonymous functions:
function get_downline($id, array $array) {
return array_filter($array, function ($i) use ($id) { return $i['upline'] == $id; });
}
BTW, I have no idea if this is what you want, since your question isn't very clear.

Answer 2

If you need do search thru yours array by $id:
foreach($array as $value)
{
$user_id = $value["id"];
$userName = $value["name"];
$some_key++;
$users_array[$user_id] = array("name" => $userName, "upline" => '1');
}
function get_downline($user_id, $users_array){
foreach($users_array as $key => $value)
{
if($key == $user_id)
{
echo $value["name"];
...do something else.....
}
}
}
or to search by 'upline':
function get_downline($search_upline, $users_array){
foreach($users_array as $key => $value)
{
$user_upline = $value["upline"];
if($user_upline == $search_upline)
{
echo $value["name"];
...do something else.....
}
}
}

Answer 3

Code :
function get_downline($userid,$users_array)
{
$result = array();
foreach ($users_array as $user)
{
if ($user['id']==$userid)
$result[] = $user['upline'];
}
return result;
}
?>
Example Usage :
get_downline(4,$array);