explode and foreach to show strings or ASCII

//transfer ASCII to string

$string = “78b101b116b87b105b110b100”;
$tags = explode(‘b’, $string); 
foreach($tags as $key) { echo chr($key);  }
//transfer string toASCII
echo “<br><br>”;
$string = “Tiger Young”;
foreach($tags as $key) { echo ord($key).”b”;  }
echo “<br><br>”;