.SM to SMM

<?
$bpm = 150;
$data = "0000
0000
0000
0000
";

function cleanEmpty($arr)   {
    $newarray = array();
    foreach($arr as $x) {
        if(!empty($x))
            array_push($newarray,$x);
    }
    return $newarray;
}
function swap(&$valor_1, &$valor_2) {
    list($valor_1, $valor_2) = array($valor_2, $valor_1);
}

function sortBeats($arr)    {
    $len = count($arr);
    for($i=0;$i<$len;$i++)  {
        for($j=$i;$j<$len;$j++) {
            if($arr[$i][1] > $arr[$j][1])
                swap($arr[$i],$arr[$j]);
        }
    }
    return $arr;
}

$bps = 4;
//$bps = round(($bpm / 60)*100000)/100000;
$beats = explode(",",$data);
$beatn = 0;

$convertedbeats = array();

foreach($beats as $beat)    {
    //print "B:".$beatn." T: ".($beatn * $bps)."\n";
    $subbeats = cleanEmpty(explode("\n",$beat));
    $subbeattime = $bps / count($subbeats);
    $n = 0;
    foreach($subbeats as $subbeat)  {
        if($subbeat != "0000")  {
            $time = round( (($beatn * $bps) + $subbeattime * $n)*100000)/100000;
            for($p=0;$p<4;$p++) {
                if($subbeat[$p] > 0 )   {
                    $beatdata = array( $time, $p, new stdClass() );
                    array_push($convertedbeats, $beatdata);
                }
            }
        }
        $n++;
    }
    $beatn++;
}
$convertedbeats = sortBeats($convertedbeats);
print json_encode($convertedbeats);