How can I get a hex dump of a string in PHP?

Question

I'm investigating encodings in PHP5. Is there some way to get a raw hex dump of a string? i.e. a hex representation of each of the bytes (not characters) in a string?

Answer 1

for ($i = 0; $i < strlen($string); $i++) {
    echo dechex(ord($string[$i]));
}

or easier

echo bin2hex($string);