Check value within range or not php

Question

I want to check value with in range or not suppose if I have range D1 to D40 and if I enter D20 then it returns value with in range.

I check several solution but this are for only integer not for both string and integer.

EDIT

Range will be dynamic like AA20 to AA30 or like AC10D to AC30D

Answer 1

You can write something simpler like this...

$arr = range(1,40); //<--- Creating a range of 1 to 40 elements..
array_walk($arr,function (&$v){ $v = 'D'.$v;}); //<--- Concatenating D to all the elements..
echo in_array('D20',$arr) ? 'Found' : 'Not Found'; //<-- The search part.

Demonstration