How to convert text to \x codes?

Question

I want to convert normal text to \\x codes for e.g \\x14\\x65\\x60

For example :

normal text = \"base64_decode\"
converted \\x codes for above text =         


        

Answer 1

For an alternative to dechex(ord()) you can also use bin2hex($char), sprintf('\x%02X') or unpack('H*', $char). Additionally instead of using preg_replace_callback, you can use array_map with str_split.

echo implode(array_map(function($char) {
    return '\x' . bin2hex($char);
}, (array) str_split($word)));

echo implode(array_map(function($char) {
    return '\x' . implode(unpack('H*', $char));
}, (array) str_split($word)));

echo implode(array_map(function($char) {
    return sprintf('\x%02X', ord($char));
}, (array) str_split($word)));

Example: https://3v4l.org/6Pc6X

bin2hex

echo implode(array_map(function($char) {
    return '\x' . bin2hex($char);
}, (array) str_split('base64_decode')));

Result

\x62\x61\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65

---

unpack

echo implode(array_map(function($char) {
    return '\x' . implode(unpack('H*', $char));
}, (array) str_split('base64_decode')));

Result

\x62\x61\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65

---

sprintf

echo implode(array_map(function($char) {
    return sprintf('\x%02X', ord($char));
}, (array) str_split('base64_decode')));

Result

\x62\x61\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65

Answer 2

$str = 'base64_decode';
$length = strlen($str);
$result = '';

for ($i = 0; $i < $length; $i++) $result .= '\\x'.str_pad(dechex(ord($str[$i])),2,'0',STR_PAD_LEFT);

print($result);

Answer 3

The ord() function gives you the decimal value for a single byte. dechex() converts it to hex. So to do this, loop through the every character in the string and apply both functions.

Answer 4

PHP 5.3 one-liner:

echo preg_replace_callback("/./", function($matched) {
    return '\x'.dechex(ord($matched[0]));
}, 'base64_decode');

Outputs \x62\x61\x73\x65\x36\x34\x5f\x64\x65\x63\x6f\x64\x65

Answer 5

Here's working code:

function make_hexcodes($text) {
    $retval = '';
    for($i = 0; $i < strlen($text); ++$i) {
        $retval .= '\x'.dechex(ord($text[$i]));
    }

    return $retval;
}

echo make_hexcodes('base64_decode');

See it in action.

Answer 6

im not read this code \ud83d\udc33