[RESOLVED] Regex help

[scrupul0us]

This is seemingly so simple is embarrassing to ask help on

I need to match 3 numeric variables separately... they are partial date variables

i need to check $year against any 4 digit number no range
i need to check $month against any number between 1 and 12
i need to check $day against and number between 1 and 31

now i tried for instance:

if (preg_match("/([1-31])/",'123'))
{
	echo "true";
}
else
{
	echo "false";
}

but that returns true... it should be false since its out of range... im no regex geneious

[NogDog]

I'll start by suggesting that maybe the best approach would be to use [man]checkdate[/man]. If there's some reason that's not feasible, then we can proceed from there when you provide details as to why not.

[scrupul0us]

yea i dont think thats going to work.. my program allows the user to provide as much as all three variables or two or one... so, im not always checking a complete date

if i was that function would be perfect

[NogDog]

I might do something like:

function isInRange($value, $min, $max)
{
   return(ctype_digit($value) && $value >= $min && $value <= $max);
}

[scrupul0us]

that worked well... thanks nogdog

[Horizon88]

Don't forget to mark this resolved, please.