<?php $val = 12345; $text = sprintf("%08d",$val); $list = str_split($text,2); $data = array_map(hexdec, $list); print(join($data,",")); // 0,1,35,69
<?php $val = 12345; $text = sprintf("%08d",$val); $list = str_split($text,2); $data = array_map(hexdec, $list); print(join($data,",")); // 0,1,35,69