The following function is a php hexadecimal instance that prints the string. The core function here is chr to obtain the binary value and convert it to the hexadecimal value.
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<? Php
/*
Php prints the hexadecimal data of the string.
*/
Function hex_dump ($ data, $ newline = "n ")
{
Static $ from = '';
Static $ to = '';
Static $ width = 16; # number of bytes per line
Static $ pad = '.'; # padding for non-visible characters
If ($ from = '')
{
For ($ I = 0; $ I <= 0xFF; $ I ++)
{
$ From. = chr ($ I );
$ To. = ($ I >= 0x20 & $ I <= 0x7E )? Chr ($ I): $ pad;
}
}
$ Hex = str_split (bin2hex ($ data), $ width * 2 );
$ Chars = str_split (strtr ($ data, $ from, $ to), $ width );
$ Offset = 0;
Foreach ($ hex as $ I => $ line)
{
Echo sprintf ('% 6x', $ offset ). ':'. implode ('', str_split ($ line, 2 )). '['. $ chars [$ I]. ']'. $ newline;
$ Offset + = $ width;
}
}
$ Info = "this is a testx00x99hex_dump ";
Print_r (hex_dump ($ info ));
/*
Output result:
0: 74 68 69 73 20 69 73 20 61 20 74 65 73 74 00 99 [this is a test ..]
10: 68 65 78 5f 64 75 6d 70 [hex_dump]
*/
?>
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