Question

There is an array:

$bounds = array([0]=>array('lower'=>2,'upper'=>5), 
                [1]=>array('lower'=>0,'upper'=>3));

and a variable:

$val = 4;

Is there any PHP function that can say whether $val belongs to any interval defined by ‘lower’ and ‘upper’ bounds in $bounds array? In this example 4 belongs to the 1st interval [2; 5]. So, the answer should be ‘true’.

Answer 1

I’m not aware of any. You’ll probably have to code it. Something like this will do:

function isFromInterval($bounds, $val) {
    foreach ($bounds as $value) {
        if ($val >= $value['lower'] && $val <= $value['upper']) {
            return true;
        }
    }
    return false;
}