Membuat SEARCHING GOOGLE. pada PHP

SEARCHING GOOGLE
<form method="get" action="http://www.google.com/search">
<INPUT TYPE='text' name='q' size=31 maxlength=255 value=''>
<INPUT TYPE='hidden' name='hl' value='lacak'>     
<INPUT type='submit' name='cari' VALUE='Proses Pencarian'></p>
</FORM>


COUNTER TXT
<div id="Layer1">
    Terimakasih, Anda adalah pengunjung ke : <b><? echo counter()." </b>Kami";?></b>
    <?php
    function counter(){
    if (isset($visitor)){
        if ($visitor=="visited")
        include("counter.txt");
    }
    else {
    $file=fopen("counter.txt","r+");
    $nilai=fread($file,filesize("counter.txt"));
    fclose($file);
    $nilai += 1;
    $file=fopen("counter.txt","w+");
    fputs($file,$nilai);
    fclose($file);
    include("counter.txt");
    }
    }
    ?>
</div>
isi counter.txt=235