Values of keys in different arrays - php

Question

So I have a query that returns the following results in PHP, and I'm trying to add the total of the hours_played, I have tried array_sum() but that does not seem to work, I would like to be able to add the values of hours_played to be 11 that way I can then pass that it another function :
Array
(
[id] => 1
[team_id] => 1
[hours_played] => 1
)
Array
(
[id] => 2
[team_id] => 1
[hours_played] => 4
)
Array
(
[id] => 3
[team_id] => 1
[hours_played] => 6
)
I'm a little bit lost and do I need to store the able Arrays in another array to be able to do this? The results above are from a sql query and is what is printed on the page when I print_r the $row variable.
$sql = "SELECT * FROM table1 WHERE team_id = 1";
$res = mysql_query($sql);
while($row = mysql_fetch_assoc($res)){
print_r($row);
}

Answer 1

You can either sum all the columns hours_played after having fetched the results and assigned them into an array, as shown below
$sql = "SELECT * FROM table1 WHERE team_id = 1";
$res = mysql_query($sql);
$result = array();
while($row = mysql_fetch_assoc($res)){
$result[] = $row;
}
$sum = array_sum(array_column($result, "hours_played"));
echo $sum;
..or you can sum it up as you loop the results.
$sql = "SELECT * FROM table1 WHERE team_id = 1";
$res = mysql_query($sql);
$sum = 0;
while($row = mysql_fetch_assoc($res)){
$sum += $row['hours_played'];
}
echo $sum;
Or, if you just need the total hours played, you can do that directly in one query, using COUNT() in MySQL.
$sql = "SELECT SUM(hours_played) as sum_hours_played FROM table1 WHERE team_id = 1";
$res = mysql_query($sql);
$row = mysql_fetch_assoc($res);
echo $row['sum_hours_played'];
PHP array_column()
PHP array_sum()
MySQL COUNT()
WARNING
Do not use mysql_* functions in new code. They are no longer maintained and are officially deprecated.
See the red box?
Learn about prepared statements instead, and use PDO or MySQLi
- this article can help you decide which.

Answer 2

You're really close . You just need to add the 3rd index of each array together:
$sql = "SELECT * FROM table1 WHERE team_id = 1";
$res = mysql_query($sql);
$total = 0;
while($row = mysql_fetch_assoc($res)){
$total += $row['hours_played'];
}
CONVERSELY You can use the numbered index as well.
$total = 0;
while($row = mysql_fetch_assoc($res)){
$total += $row[2]; // indexes start at 0
}
echo $total; // Will print 11 if your arrays you posted are correct.
IN ADDITION --- WARNING!! You need to be using mysqli instead of the far less secure and now deprecated mysql

Answer 3

Most Important
Avoid using mysql_* functions. They are no longer maintained and are also officially deprecated.
Read about using prepared statements instead, and change your existing code to use PDO or MySQLi
You can get a total of hours_played in the while loop. Try this:
$sql = "SELECT * FROM table1 WHERE team_id = 1";
$res = mysql_query($sql);
$total_hours_played = 0; // initialize a variable to get sum of hours
while($row = mysql_fetch_assoc($res)){
$total_hours_played += $row['hours_played'];
}
echo $total_hours_played;

Answer 4

$sum = array_sum(array_column($array, 'hours_played'));