PHP-problem med lexikon. Array/textfil

function sve($a)
{
    $open=fopen("sve.txt","r");
    $open2=fopen("eng.txt","r");

    $i=0;
    while(!feof($open))
    {
        $get[$i]=fgets($open, 100);
        $get2[$i]=fgets($open2, 100);
        $i++;
    }

$i=0;
    foreach($get as $lyx)
    {
        $ereg=eregi($a,$lyx);
        if($ereg==1)
        {
            $get="$get[$i],";
            return $get . $get2[$i];
        }
        else
            $i++;
    }
}

function exa($a,$b)
{
    $c=explode(",",$b);
    $cmp=strcmp($a,$c[0]);
    if($cmp==0)
        echo "<center><b>$a</b>  <---->  <b>$c[1]</b></center>";
    else
        echo "Ordet finns ej i lexikonet!";
}