Need help porting ruby function to php - php

Question

I have this ruby function:
def WhitespaceHexEncode(str)
result = ""
whitespace = ""
str.each_byte do |b|
result << whitespace << "%02x" % b
whitespace = " " * (rand(3) + 1)
end
result
end
I am trying to make the same on php, this is the code I have so far:
function WhitespaceHexEncode($str)
{
$result = "";
$whitespace = "";
for($i=0;$i<strlen($str);$i++)
{
$result = $result.$whitespace.sprintf("%02x", $str[$i]);
$whitespace = " ";
for($x=0;$x<rand(0,5);$x++)
$whitespace = $whitespace." ";
}
return $result;
}
But the PHP function doesn't show the same output as the ruby one, for example:
print WhitespaceHexEncode("test fsdf dgksdkljfsd sdfjksdfsl")
Output: 74 65 73 74 20 66 73 64 66 20 64 67 6b 73 64 6b 6c 6a 66 73 64 20 73 64 66 6a 6b 73 64 66 73 6c
--------------------------------------------------------------
echo WhitespaceHexEncode("test fsdf dgksdkljfsd sdfjksdfsl")
Output: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Can someone tell me what's wrong in the php code?
UPDATE: Fixed it using bin2hex()

Answer 1

The following should work as well:
<?php
function WhitespaceHexEncode($str) {
$result = '';
foreach (str_split($str) as $b) {
$bytes = $whitespace = sprintf('%02x', ord($b));
$whitespace = str_repeat(' ', (rand(0, 5) + 1));
$result .= $bytes . $whitespace;
}
return $result;
}
echo WhitespaceHexEncode('test fsdf dgksdkljfsd sdfjksdfsl');