How can I get case-sensitive return from array_intersect()

Question

I have two arrays and I need to compare that and return matched value from array1. Please refer my code below,

$array1 = array(\"a\" => \"Green\", \"Red\"         


        

Answer 1

This is because you put all values to lowercase. Just change to array_uintersect() and use strcasecmp() as callback function to compare them case-insensitive, like this:

$result = array_uintersect($array1, $array2, "strcasecmp");

output:

Array ( [a] => Green [0] => Red )