Php prints the hexadecimal string

The following function is a php hexadecimal instance that prints a string. The core function here is chr to obtain the binary value and convert it to the hexadecimal number. the code is as follows: & lt ;? Php * php printing

The following function is a php hexadecimal instance that prints a string. The core function here is chr to obtain the binary value and convert it to the hexadecimal value. The code is as follows:

2. /*
3. Php prints the hexadecimal data of the string.
4. */
5. Function hex_dump ($ data, $ newline = "n ")
6. {
7. Static $ from = '';
8. Static $ to = '';
10. Static $ width = 16; # number of bytes per line
12. Static $ pad = '.'; # padding for non-visible characters
14. If ($ from = '')
15. {
16. For ($ I = 0; $ I <= 0xFF; $ I ++)
17. {
18. $ From. = chr ($ I );
19. $ To. = ($ I >= 0x20 & $ I <= 0x7E )? Chr ($ I): $ pad;
20. }
21. }
23. $ Hex = str_split (bin2hex ($ data), $ width * 2 );
24. $ Chars = str_split (strtr ($ data, $ from, $ to), $ width );
26. $ Offset = 0;
27. Foreach ($ hex as $ I => $ line)
28. {
29. Echo sprintf ('% 6x', $ offset ). ':'. implode ('', str_split ($ line, 2 )). '['. $ chars [$ I]. ']'. $ newline;
30. $ Offset + = $ width;
31. }
32. }
34. $ Info = "this is a testx00x99hex_dump ";
35. Print_r (hex_dump ($ info ));
36. /*
37. Output result:
39. 0: 74 68 69 73 20 69 73 20 61 20 74 65 73 74 00 99 [this is a test ..]
41. 10: 68 65 78 5f 64 75 6d 70 [hex_dump]
42. */
43. ?>