|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/** |
|
4
|
|
|
* Linna Filter |
|
5
|
|
|
* |
|
6
|
|
|
* @author Sebastian Rapetti <[email protected]> |
|
7
|
|
|
* @copyright (c) 2018, Sebastian Rapetti |
|
8
|
|
|
* @license http://opensource.org/licenses/MIT MIT License |
|
9
|
|
|
*/ |
|
10
|
|
|
declare(strict_types = 1); |
|
11
|
|
|
|
|
12
|
|
|
namespace Linna\Filter\Rules; |
|
13
|
|
|
|
|
14
|
|
|
/** |
|
15
|
|
|
* Return html entities. |
|
16
|
|
|
*/ |
|
17
|
|
|
class Escape |
|
18
|
|
|
{ |
|
19
|
|
|
/** |
|
20
|
|
|
* @var array Arguments expected. |
|
21
|
|
|
*/ |
|
22
|
|
|
private $arguments = []; |
|
|
|
|
|
|
23
|
|
|
|
|
24
|
|
|
/** |
|
25
|
|
|
* Sanitize. |
|
26
|
|
|
* |
|
27
|
|
|
* @param mixed $value |
|
28
|
|
|
*/ |
|
29
|
12 |
|
public function sanitize(&$value): void |
|
30
|
|
|
{ |
|
31
|
12 |
|
$value = $this->htmlEscape($value); |
|
32
|
12 |
|
} |
|
33
|
|
|
|
|
34
|
|
|
/** |
|
35
|
|
|
* Return numerical part of the HTML encoding of the Unicode character. |
|
36
|
|
|
* |
|
37
|
|
|
* @param string $char |
|
38
|
|
|
* @return int |
|
39
|
|
|
*/ |
|
40
|
12 |
|
private function ordutf8(string $char): int |
|
41
|
|
|
{ |
|
42
|
12 |
|
$code = ord(substr($char, 0, 1)); |
|
43
|
|
|
|
|
44
|
12 |
|
if ($code > 239) { |
|
45
|
3 |
|
return ((ord(substr($char, 1, 1)) - 128) * |
|
46
|
3 |
|
64 + ord(substr($char, 2, 1)) - 128) * |
|
47
|
3 |
|
64 + ord(substr($char, 3, 1)) - 128; |
|
48
|
|
|
} |
|
49
|
|
|
|
|
50
|
10 |
|
if ($code > 223) { |
|
51
|
2 |
|
return (($code - 224) * 64 + ord(substr($char, 1, 1)) - 128) |
|
52
|
2 |
|
* 64 + ord(substr($char, 2, 1)) - 128; |
|
53
|
|
|
} |
|
54
|
|
|
|
|
55
|
9 |
|
if ($code > 127) { |
|
56
|
2 |
|
return ($code - 192) * 64 + ord(substr($char, 1, 1)) - 128; |
|
57
|
|
|
} |
|
58
|
|
|
|
|
59
|
7 |
|
return $code; |
|
60
|
|
|
} |
|
61
|
|
|
|
|
62
|
|
|
/** |
|
63
|
|
|
* Convert char to html entities. |
|
64
|
|
|
* |
|
65
|
|
|
* @param string $string |
|
66
|
|
|
* @return string |
|
67
|
|
|
*/ |
|
68
|
12 |
|
private function htmlEscape(string $string): string |
|
69
|
|
|
{ |
|
70
|
12 |
|
$chars = preg_split('//u', $string, 0, PREG_SPLIT_NO_EMPTY); |
|
71
|
12 |
|
$escaped = ''; |
|
72
|
|
|
|
|
73
|
|
|
$permitted = [ |
|
74
|
12 |
|
32,48,49,50,51,52,53,54,55,56,57,65,66,67,68, |
|
75
|
|
|
69,70,71,72,73,74,75,76,77,78,79,80,81,82,83, |
|
76
|
|
|
84,85,86,87,88,89,90,97,98,99,100,101,102,103, |
|
77
|
|
|
104,105,106,107,108,109,110,111,112,113,114, |
|
78
|
|
|
115,116,117,118,119,120,121,122 |
|
79
|
|
|
]; |
|
80
|
|
|
|
|
81
|
12 |
|
foreach ($chars as $char) { |
|
82
|
12 |
|
$ord = $this->ordutf8($char); |
|
83
|
|
|
|
|
84
|
12 |
|
if (!in_array($ord, $permitted)) { |
|
85
|
9 |
|
$escaped .= "&#{$ord};"; |
|
86
|
9 |
|
continue; |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
7 |
|
$escaped .= $char; |
|
90
|
|
|
} |
|
91
|
|
|
|
|
92
|
12 |
|
return $escaped; |
|
93
|
|
|
} |
|
94
|
|
|
} |
|
95
|
|
|
|
linna /
filter
Loading history...