$value = in_array($value, $possible_values) ? $value : $default_value;
Does a "clamp" number function exist in PHP?
Question
I wrote a function to "clamp" numbers in PHP, but I wonder if this function exists natively in the language.
I read PHP.net documentation in the math section, but I couldn't find it.
Basically what my function does is that it accepts a variable, an array of possible values, and a default value, this is my function's signature:
function clamp_number($value, $possible_values, $default_value)
If $value
does not match any of the $possible_values
then it defaults to $default_value
I think my function would be way faster if PHP already provides it natively because I'm using quite often in my program.
La solution 2
Autres conseils
It seems as though you are just trying to find a number within a set. An actual clamp function will make sure a number is within 2 numbers (a lower bounds and upper bounds). So psudo code would be clamp(55, 1, 10)
would produce 10
and clamp(-15, 1, 10)
would produce 1
where clamp(7, 1, 10)
would produce 7
. I know you are looking for more of an in_array
method but for those who get here from Google, here is how you can clamp in PHP without making a function (or by making this into a function).
max($min, min($max, $current))
For example:
$min = 1;
$max = 10;
$current = 55;
$clamped = max($min, min($max, $current));
// $clamped is now == 10
A simple clamp method would be:
function clamp($current, $min, $max) {
return max($min, min($max, $current));
}