* @link http://aidanlister.com/2004/04/viewing-binary-data-as-a-hexdump-in-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 $return Set to true to return the dump
*/
/*
* Plus minor modifications (offset/len parameter) and bugfix (printable ascii range)
*/
function bomfix_hexdump ($data, $offset = 0, $len = 0, $htmloutput = true, $uppercase = false, $return = false)
{
// Init
$hexi = '';
$ascii = '';
$dump = ($htmloutput === true) ? '' : '';
if($len === 0) { $len = strlen($data); }
// Upper or lower case hexadecimal
$x = ($uppercase === false) ? 'x' : 'X';
// Iterate string
$j = 0;
for ($i = $offset; $i < $len; $i++)
{
// Convert to hexidecimal
$hexi .= sprintf("%02$x ", ord($data[$i]));
// Replace non-viewable bytes with '.'
if (ord($data[$i]) >= 0x20 && ord($data[$i]) <= 0x7E) {
$ascii .= ($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;
}
}
?>