picture style decoded tags 0x10

<?php

function read_as_byte($filename){
    $handle = fopen($filename, "rb");
    $fsize = filesize($filename);
    $contents = fread($handle, $fsize);
    $byteArray = unpack("C*",$contents);
    return $byteArray;
}

$key = read_as_byte("./canon_ps.key");
$enc_file = read_as_byte("./picturestyle.pf3");

$i = -11;
$dec = array();

foreach($enc_file as $ef){
    if($i>-1){
        $dec[] = $ef^$key[$i];
        $i = $i%(512*513);
    }
    else
    {
        $dec[] = $ef;
    }
    $i++;
}
for($c=0;$c<count($dec);$c++){
    $val = $dec[$c];
    if($val==0x10){
        $c++;
        echo "<br/><br/>".$val." ".$dec[$c]."<br/><br/>";
    }
    else{
        echo $dec[$c]." ";
    }
}