|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Didatus\RandomString; |
|
4
|
|
|
|
|
5
|
|
|
/** |
|
6
|
|
|
* Class RandomString |
|
7
|
|
|
* @package Didatus\RandomString |
|
8
|
|
|
*/ |
|
9
|
|
|
class RandomString { |
|
10
|
|
|
/** |
|
11
|
|
|
* contains the list of characters to be used for random string generation |
|
12
|
|
|
* @var string |
|
13
|
|
|
*/ |
|
14
|
|
|
private $character_pool = ''; |
|
15
|
|
|
|
|
16
|
|
|
/** |
|
17
|
|
|
* contains the list of characters to be excluded from random string generation |
|
18
|
|
|
* @var string |
|
19
|
|
|
*/ |
|
20
|
|
|
private $except_characters = ''; |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* defines wether a character is unique in a random string or not |
|
24
|
|
|
* @var bool |
|
25
|
|
|
*/ |
|
26
|
|
|
private $unique_characters = false; |
|
27
|
|
|
|
|
28
|
|
|
/** |
|
29
|
|
|
* RandomString constructor. |
|
30
|
|
|
* @param string $character_pool |
|
31
|
|
|
* @param string $except_characters |
|
32
|
|
|
* @param bool $unique_characters |
|
33
|
|
|
*/ |
|
34
|
|
|
public function __construct( |
|
35
|
|
|
string $character_pool = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', |
|
36
|
|
|
string $except_characters = '', |
|
37
|
|
|
bool $unique_characters = false |
|
38
|
|
|
) { |
|
39
|
|
|
$this->character_pool = $character_pool; |
|
40
|
|
|
$this->except_characters = $except_characters; |
|
41
|
|
|
$this->unique_characters = $unique_characters; |
|
42
|
|
|
} |
|
43
|
|
|
|
|
44
|
|
|
/** |
|
45
|
|
|
* generates one random string of $length and returns it |
|
46
|
|
|
* @param int $length |
|
47
|
|
|
* @return string |
|
48
|
|
|
*/ |
|
49
|
6 |
|
public function getString(int $length = 10):string |
|
50
|
|
|
{ |
|
51
|
6 |
|
$string_length = 0; |
|
52
|
6 |
|
$string = ''; |
|
53
|
6 |
|
while ($string_length < $length) |
|
54
|
|
|
{ |
|
55
|
6 |
|
$character = $this->getRandomCharacter(); |
|
56
|
6 |
|
if ($this->unique_characters && $this->containsCharacter($string, $character)) { |
|
57
|
1 |
|
continue; |
|
58
|
|
|
} |
|
59
|
6 |
|
$string .= $character; |
|
60
|
6 |
|
$string_length = strlen($string); |
|
61
|
|
|
} |
|
62
|
|
|
|
|
63
|
6 |
|
return $string; |
|
64
|
|
|
} |
|
65
|
|
|
|
|
66
|
|
|
/** |
|
67
|
|
|
* generates a list of random strings of $length and returns it |
|
68
|
|
|
* @param $length |
|
69
|
|
|
* @param $count |
|
70
|
|
|
* @return array |
|
71
|
|
|
*/ |
|
72
|
2 |
|
public function getListOfString(int $length, int $count):array |
|
73
|
|
|
{ |
|
74
|
2 |
|
$list_count = 0; |
|
75
|
2 |
|
for ($strings = []; $list_count < $count;) |
|
76
|
|
|
{ |
|
77
|
2 |
|
$strings[] = $this->getString($length); |
|
78
|
2 |
|
$list_count = count($strings); |
|
79
|
|
|
} |
|
80
|
|
|
|
|
81
|
2 |
|
return $strings; |
|
82
|
|
|
} |
|
83
|
|
|
|
|
84
|
|
|
/** |
|
85
|
|
|
* provides a random character |
|
86
|
|
|
* @return string |
|
87
|
|
|
*/ |
|
88
|
|
|
private function getRandomCharacter():string |
|
89
|
|
|
{ |
|
90
|
|
|
return $this->getCharacterPool()[rand(0, strlen($this->getCharacterPool()) - 1)]; |
|
91
|
|
|
} |
|
92
|
|
|
|
|
93
|
|
|
/** |
|
94
|
|
|
* generates the character pool without character exceptions |
|
95
|
|
|
* @return string |
|
96
|
|
|
*/ |
|
97
|
|
|
private function getCharacterPool():string |
|
98
|
|
|
{ |
|
99
|
|
|
return implode("", array_diff(str_split($this->character_pool), str_split($this->except_characters))); |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
|
|
/** |
|
103
|
|
|
* checks if the given string contains given character |
|
104
|
|
|
* @param $string |
|
105
|
|
|
* @param $character |
|
106
|
|
|
* @return bool |
|
107
|
|
|
*/ |
|
108
|
|
|
private function containsCharacter($string, $character):bool |
|
109
|
|
|
{ |
|
110
|
|
|
if (strpos($string, $character) !== false) { |
|
111
|
|
|
return true; |
|
112
|
|
|
} |
|
113
|
|
|
|
|
114
|
|
|
return false; |
|
115
|
|
|
} |
|
116
|
|
|
} |
|
117
|
|
|
|
didatus /
RandomString
