* @author Peter Waller * @link http://aidanlister.com/repos/v/function.hexdump.php * @param string $data The string to be dumped * @param bool $htmloutput Set to false for non-HTML output * @param bool $uppercase Set to true for uppercase hex * @param bool $return Set to true to return the dump */ public static function hexdump($data, $htmloutput = true, $uppercase = false, $return = false) { // Init $hexi = ''; $ascii = ''; $dump = ($htmloutput === true) ? '

' : '';
        $offset = 0;
        $len    = strlen($data);

        // Upper or lower case hexidecimal
        $x = ($uppercase === false) ? 'x' : 'X';

        // Iterate string
        for ($i = $j = 0; $i < $len; $i++) {
            // Convert to hexidecimal
            $hexi .= sprintf("%02$x ", ord($data[$i]));

            // Replace non-viewable bytes with '.'
            if (ord($data[$i]) >= 32) {
                $ascii .= ($htmloutput === true) ?
                                htmlentities($data[$i]) :
                                $data[$i];
            } else {
                $ascii .= '.';
            }

            // Add extra column spacing
            if ($j === 7) {
                $hexi  .= ' ';
                $ascii .= ' ';
            }

            // Add row
            if (++$j === 16 || $i === $len - 1) {
                // Join the hexi / ascii output
                $dump .= sprintf("%04$x  %-49s  %s", $offset, $hexi, $ascii);

                // Reset vars
                $hexi   = $ascii = '';
                $offset += 16;
                $j      = 0;

                // Add newline
                if ($i !== $len - 1) {
                    $dump .= "\n";
                }
            }
        }

        // Finish dump
        $dump .= $htmloutput === true ?
                    '

' : ''; $dump .= "\n"; // Output method if ($return === false) { echo $dump; } else { return $dump; } } }