How to compare two character in php?

Any one explain me how can I compare two characters in php

Here my Code:

$unsorted = Array(
        "0" =>"0000C11",
        "1" =>"0000A11",
        "2" =>"0000C13",
        "3" =>"0000D11",
    );

$sortArr = array('A','B','C','D');

foreach ($unsorted as $key => $value) {
        $val = substr($value,-3,1);
        foreach ($sortArr as $key1 => $value1) {
            if ($val === $value1 ) {
                $sortArrFin[] = $value;
            }
        }
}
echo "<pre>";
print_r($sortArrFin);
Copy code

Here I want to checkconditionif ($val === $value1 ) but it gives always true.. Means if$val = C and $value1 = A ti's return true... Please help me.

Thanks