How to push the condition based value in existing array in PHP - php

Question

I am having three arrays
topicsSelected
relavantGroups
topicAssingned
$topicsSelected = [ "T-100","T-600"];
$relavantGroups = [
[ "id" => "G-001","name" => "3 A","active" => false ],
["id" => "G-002","name" => "3 B","active" => false]
];
$topicAssingned = [
"G-001" => [
"groupID" => "G-001",
"groupName" => "3 A",
"topics" => [
"T-100" => [
"topicID" => "T-100"
],
"T-200" => [
"topicID" => "T-200"
]
]
],
"G-002" => [
"groupID" => "G-002",
"groupName" => "3 B",
"topics" => [
"T-400" => [
"topicID" => "T-400"
],
"T-500" => [
"topicID" => "T-500"
]
]
],
];
$topicsSelected array values at least one value should present $topicAssingned means based on groupID, i have to push one value to $relavantGroups like disable : D suppose value not present means disable : A
Expected output:
[
"id" => "G-001",
"name" => "3 A",
"active" => false,
"disable" => "D"
],
[
"id" => "G-002",
"name" => "3 B",
"active" => false,
"disable" => "A"
]

Answer 1

<?php
$topicsSelected = [ "T-100","T-600"];
$relavantGroups = [
[ "id" => "G-001","name" => "3 A","active" => false ],
["id" => "G-002","name" => "3 B","active" => false]
];
$topicAssigned = [
"G-001" => [
"groupID" => "G-001",
"groupName" => "3 A",
"topics" => [
"T-100" => [
"topicID" => "T-100"
],
"T-200" => [
"topicID" => "T-200"
]
]
],
"G-002" => [
"groupID" => "G-002",
"groupName" => "3 B",
"topics" => [
"T-400" => [
"topicID" => "T-400"
],
"T-500" => [
"topicID" => "T-500"
]
]
],
];
$topic_selected_map = [];
foreach($topicsSelected as $each_topic){
$topic_selected_map[$each_topic] = true;
}
$relevant_group_map = [];
foreach($relavantGroups as $each_group){
$relevant_group_map[$each_group['id']] = $each_group;
}
$result = [];
foreach($topicAssigned as $each_assigned_topic){
if(!isset($relevant_group_map[$each_assigned_topic['groupID']])) continue;
$topics_not_found = true;
foreach($each_assigned_topic['topics'] as $each_topic => $topic_details){
if(isset($topic_selected_map[$each_topic])){
$topics_not_found = false;
break;
}
}
$result[] = [
'id' => $each_assigned_topic['groupID'],
'name' => $each_assigned_topic['groupName'],
'active' => $relevant_group_map[$each_assigned_topic['groupID']]['active'],
'disable' => ($topics_not_found === true ? 'A' : 'D')
];
}
print_r($result);
Output:
Array
(
[0] => Array
(
[id] => G-001
[name] => 3 A
[active] => false
[disable] => D
)
[1] => Array
(
[id] => G-002
[name] => 3 B
[active] => false
[disable] => A
)
)
First, make a map(associative array) of values of $topicsSelected. Same goes for $relavantGroups. This is to make the check more efficient. See more on Hash Table.
Now, iterate over $topicAssigned and then iterate over each group's topics inside it. Now, check if a topic exists inside $topicsSelected using a simple isset function. If yes, we disable them, else we don't.

Answer 2

It's not very clear what you are asking and the code is a bit weird but I'll give it a try.
First fix your array declaration - you should use => and not :;
You have to Iterate over the $relavantGroups and for each element iterate the $topicAssingned array. Then perform a simple comparison to see if the group Id is present and you are done!
Here is my solution (quick and dirty): You can see it here
foreach ($relavantGroups as &$g) {
$found = false;
foreach ($topicAssingned as $key => $assigned) {
if ($key === $g["id"] && is_array($assigned["topics"])) {
foreach ($assigned["topics"] as $topic) {
if (in_array($topic["topicID"], $topicsSelected)) {
$found = true;
break;
}
}
}
}
$g["disable"] = $found ? "D" : "A";
}
var_dump($relavantGroups);
Updated the solution - note that I'm using in_array() to determine if the topicID is present. That mean that any value that is in the $topicsSelected array will affect the result.
Hope I helped.
This will output (based one your example):
array(2) {
[0]=> array(4) {
["id"]=> string(5) "G-001"
["name"]=> string(3) "3 A"
["active"]=> bool(false)
["disable"]=> string(1) "D"
}
[1]=> array(4) {
["id"]=> string(5) "G-002"
["name"]=> string(3) "3 B"
["active"]=> bool(false)
["disable"]=> string(1) "A"
}
}