need help with IF statements

I have urls like this
index.php?k1=kilometers&k2=feet&q=4
index.php?k1=miles&k2=inch&q=4
i want to set values for $k1Abbreviation and $k2Abbreviation
$q = $_GET["q"];
$k1 = $_GET["k1"];
$k2 = $_GET["k2"];
if ($k1 = "kilometers" OR $k2 […]

See original post by invalid@example.com (ipunkbali)