PHP if / if else statement not working as expected (Probably Simple)

Ok, I am trying to do an IF / else IF statement that doesn't act as i would expect. I am trying to check that a URL address someone enters for certain things. The way I have done it is probably crap but I am not that good at programming.

All the IF parts work except for this bit if (strpos($URLcheck, "http://") == false)

It is supposed to check if the URL has http:// in it. But whether it does or doesn't it still acts exactly the same way.

I even tried forcing the http:// into the URL by stripping it of http:// or https://.

When I echo the variable ($URLcheck) , it shows the URL with the http://.....so why doesn't my code work? Thanks

    $URL = htmlspecialchars($_POST["URL"]);

    $URLREMOVESarray = array('https//:', 'http//:');
    $URLhttp = str_replace($URLREMOVESarray, "", $URL);

    $URLcheck = "http://" . $URLhttp;

    $URLsearchcheck2 = 'property-profile/';

    $URLsearchcheckDomain = "domain";


    if (strpos($URL, $URLsearchcheck2) !== false) {

   echo "Test 1";
   }
   else if (strpos($URLcheck, "http://") == false) {
   echo "Test 2";
   echo $URLcheck;
   }
   else if (strpos($URLcheck, $URLsearchcheckDomain) == false) {

   echo "Test 3";
   }
   else if (strpos($URLcheck, $URLsearchcheckDomain) == true) {
         Continue1();
   }