Finding a string by looping through an array php

I have this array $filelist

Array ( [0] => . [1] => .. [2] => .DS_Store [3] => 11-96.eml [4] => 11-97.eml ) 

Which is a list of all files in a particular directory... Sometimes there is no .DS_Store file, sometimes there is, sometimes there are 2 eml files, sometimes there are as many as 6. I'm trying to loop through and find the first array position a .eml file exists so that I can work out how many file are eml and where to start referencing the array.. I have tried...

 function firstFileInList($filelist) {
        $x = 0;
        foreach ($filelist as $value) {
          if(strpos($filelist, ".eml") == false) {
              $x = $x + 1;   
             //break;
            }

          }

          return $x;
      }

This returns 5, if I include the break it returns 1 and I was expecting to get 4.

Please could somebody point me in the right direction or even if there is a completely better way to do this then I would be more than grateful to see that...

Thanks Paul,