PHP foreach loop returning the matching item

Question

I want to return the matching item's value in foreach loop. I have tried with the blow code but it is not returning correctly. If the matches with the last item, it won't returns the correct value.

//$bonuses = count => amount
Array
(
    [15] => 25
    [30] => 50
    [46] => 100
)

// getting keys to compare the count
$counts = array_keys($bonuses);

foreach ($bonuses as $count => $bonus) {
    if ($total_number_of_products <= next($counts)) {
    $tti = 'Items: '. $total_number_of_products. ' Bonus: '. $bonus. '<BR/>';
    }
}

The loop should returns the item if less than or equal. If the count is 46 or higher (in this case) the output should 100. Now it is returning 50.

That's correct. It's a flat bonus. User will get only when the count reaches to the number. No in-betweens. — Code Lover
– Code Lover, Commented Jan 11, 2021 at 6:56

Nick · Accepted Answer · 2021-01-11 07:01:30Z

You are on the right track, but you need to output the prior bonus value only until you reach the next key. This is one way to do that:

function get_bonus($total_number_of_products) {
    $bonuses = array(15 => 25, 30 => 50, 46 => 100);
    $bonus = 0;
    foreach ($bonuses as $num_products => $next_bonus) {
        if ($total_number_of_products < $num_products) break;
        $bonus = $next_bonus;
    }
    return $bonus;
}

Sample usage:

foreach ([10, 20, 30, 45, 46, 50] as $products) {
    echo 'Items: '. $products. ' Bonus: '. get_bonus($products). '<BR/>' . "\n";
}

Output:

Items: 10 Bonus: 0<BR/>
Items: 20 Bonus: 25<BR/>
Items: 30 Bonus: 50<BR/>
Items: 45 Bonus: 50<BR/>
Items: 46 Bonus: 100<BR/>
Items: 50 Bonus: 100<BR/>

Demo on 3v4l.org

Note you can make a minor simplification by adding a 0 => 0 entry to $bonuses, then you can remove the $bonus = 0 line i.e.

function get_bonus($total_number_of_products) {
    $bonuses = array(0 => 0, 15 => 25, 30 => 50, 46 => 100);
    foreach ($bonuses as $num_products => $next_bonus) {
        if ($total_number_of_products < $num_products) break;
        $bonus = $next_bonus;
    }
    return $bonus;
}

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