add values of array in php - php

Question

Hi i know its very simple but im stuck in this.
Im fetching data by using join from database.. Now i got the values in array. i want to add these two value in a variable.
Code is below..
$sql = "SELECT event_details.max_team_size FROM booking_details INNER JOIN event_details on booking_details.subcategory_id=event_details.id WHERE booking_details.`booking_id` = ".$booking_id." ";
$command = Yii::$app->db->createCommand($sql);
$array = $command->queryAll();
$array has got the values like this..
Array
(
[0] => Array
(
[max_team_size] => 6
)
[1] => Array
(
[max_team_size] => 8
)
)
I want to add these two max_team_size into a single variable and use that later to compare.

Answer 1

$sum = 0;
foreach($array as $data){
$sum += $data->max_team_size;
}
echo $sum;

Answer 2

Sum you can get from SQL also by using SUM function
SELECT SUM(event_details.max_team_size) FROM booking_details...
In Yii the solution will be
$sql = "SELECT SUM(event_details.max_team_size) as total FROM booking_details INNER JOIN event_details on booking_details.subcategory_id=event_details.id WHERE booking_details.`booking_id` = ".$booking_id." ";
$command = Yii::$app->db->createCommand($sql);
$array = $command->queryRow();
In PHP to sum particular key in single array you can convert it to single array by using array_column function and then use sum function
$array = array_column($array, 'max_team_size');
$total = array_sum($array);
Note: array_column will work PHP >= 5.5, for PHP < 5.5 you can use foreach loop

Answer 3

Define an empty array like this:
$maxArr = array();
You can run a foreach loop for your array now and add variable.
Like this:
foreach($gotArr as $key=>$val){
}