CODEWITHSUNDEEP
phparraysloops
Vasco
Vasco

Reputation: 93

get lowest value in the array based on variable

I am struggling to get the lowest value based on the answer of the client.

$client_answer = 28;

$array = array(10,20,30,40,50);

The answer that should be given is: 20

So every answer should be rounded down to the lower number.

Other examples:

$client_answer = 37;

$array = array(10,20,30,40,50);

answer should be 30.

$client_answer = 14;

$array = array(10,20,30,40,50);

answer should be 10.

$client_answer = 45;

$array = array(10,20,30,40,50);

answer should be 40.

Is there a php function that I can use for this?

If not how can this be accomplished?

Upvotes: 2

Views: 79

Answers (3)

Vermeersch Wouter
Vermeersch Wouter

Reputation: 63

Only this rounds correctly

$client_answer = 28;
$array = array(10,20,30,40,50);
rsort($array,1);
$min_diff = max($array);
$closest_val = max($array);

foreach($array as $val)
{
    if(abs($client_answer - $val) < $min_diff)
    {
        $min_diff = abs($client_answer - $val);
        $closest_val = $val;
    }

}
echo $closest_val;

Upvotes: -1

Csmeau4
Csmeau4

Reputation: 30

This might be a very stupid answer, but in this specific case, you are trying to truncate the unit number? Why not try this:

$client_answer = intdiv( $client_answer, 10) * 10;

Divide by 10, get rid of the last digit, and multiply again. EDIT : typo

Upvotes: -1

Qirel
Qirel

Reputation: 26450

You can filter the array to only contain values equal to or below the given value $client_answer, then use max() on the filtered array.

$value = max(array_filter($array, function($v) use ($client_answer) {
    return $v <= $client_answer;
}));

Upvotes: 6

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