Вывод DJ

<?php
function antara($string, $start, $end){
$string = " ".$string;
$ini = strpos($string,$start);
if ($ini == 0) return "";
$ini += strlen($start);
$len = strpos($string,$end,$ini) - $ini;
return substr($string,$ini,$len);
}

$mount1 = "http://******.ru:8000/status.xsl?mount=/play";
$mount2 = "http://******.ru:8000/status.xsl?mount=/nonstop";

if(antara($mount1) !='')
{
echo antara($mount1);
}
elseif(antara($mount2) !='')
{
echo antara($mount2);
}
?>

Warning: Missing argument 2 for antara(), called in /home/virtwww/w_promo-rap-ru_a46dbbb6/http/test/stat.php on line 14 and defined in /home/virtwww/w_promo-rap-ru_a46dbbb6/http/test/stat.php on line 2
Warning: Missing argument 3 for antara(), called in /home/virtwww/w_promo-rap-ru_a46dbbb6/http/test/stat.php on line 14 and defined in /home/virtwww/w_promo-rap-ru_a46dbbb6/http/test/stat.php on line 2
Warning: Missing argument 2 for antara(), called in /home/virtwww/w_promo-rap-ru_a46dbbb6/http/test/stat.php on line 18 and defined in /home/virtwww/w_promo-rap-ru_a46dbbb6/http/test/stat.php on line 2
Warning: Missing argument 3 for antara(), called in /home/virtwww/w_promo-rap-ru_a46dbbb6/http/test/stat.php on line 18 and defined in /home/virtwww/w_promo-rap-ru_a46dbbb6/http/test/stat.php on line 2