| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | namespace BenTools\StringCombinations; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  | use IteratorAggregate; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  | final class NoDuplicateLettersStringCombinations implements IteratorAggregate, StringCombinationsInterface | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  |      * @var StringCombinations | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  |     private $stringCombinations; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |      * UniqueStringCombinations constructor. | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 16 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 17 |  |  |     public function __construct(StringCombinations $stringCombinations) | 
            
                                                                        
                            
            
                                    
            
            
                | 18 |  |  |     { | 
            
                                                                        
                            
            
                                    
            
            
                | 19 |  |  |         $this->stringCombinations = $stringCombinations; | 
            
                                                                        
                            
            
                                    
            
            
                | 20 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |      * @inheritDoc | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |     public function getIterator() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |         for ($i = $this->stringCombinations->min; $i <= $this->stringCombinations->max; $i++) { | 
                            
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                | 28 |  |  |             foreach ($this->permute($this->stringCombinations->charset, $i) as $combination) { | 
                            
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                | 29 |  |  |                 yield implode($this->stringCombinations->glue, $combination); | 
                            
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                | 30 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |      * @inheritDoc | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  |     public function count() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |         $arr = []; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |         for ($pos = $this->stringCombinations->max, $i = 0; $pos >= $this->stringCombinations->min; $pos--, $i++) { | 
                            
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                | 42 |  |  |             if (0 === $i) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  |                 $arr[$i] = [$pos]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  |             } else { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |                 $arr[$i] = array_merge($arr[$i - 1], [$pos]); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |         return array_sum(array_map('array_product', $arr)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |     private function permute(array $charset, $length = null) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |         $n = count($charset); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |         if (null === $length) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |             $length = $n; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |         if ($length > $n) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |             return; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  |         $indices = range(0, $n - 1); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |         $cycles = range($n, $n - $length + 1, -1); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  |         yield array_slice($charset, 0, $length); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  |         if ($n <= 0) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |             return; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  |         while (true) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  |             $exitEarly = false; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  |             for ($i = $length; $i--;) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |                 $cycles[$i]-= 1; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |                 if ($cycles[$i] == 0) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |                     if ($i < count($indices)) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  |                         $removed = array_splice($indices, $i, 1); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  |                         $indices[] = $removed[0]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  |                     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  |                     $cycles[$i] = $n - $i; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 |  |  |                 } else { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  |                     $j = $cycles[$i]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  |                     $value = $indices[$i]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  |                     $negative = $indices[count($indices) - $j]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  |                     $indices[$i] = $negative; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  |                     $indices[count($indices) - $j] = $value; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |                     $result = []; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  |                     $counter = 0; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  |                     foreach ($indices as $index) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  |                         $result[] = $charset[$index]; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |                         $counter++; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |                         if ($counter == $length) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |                             break; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |                         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |                     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  |                     yield $result; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  |                     $exitEarly = true; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  |                     break; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  |                 } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  |             if (!$exitEarly) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  |                 break; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  |      * @inheritDoc | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |     public function getRandomString() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  |         $charset = $this->stringCombinations->charset; | 
                            
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                | 115 |  |  |         $string = []; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  |         $length = random_int($this->stringCombinations->min, $this->stringCombinations->max); | 
                            
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                | 118 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  |         for ($pos = 1; $pos <= $length; $pos++) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  |             shuffle($charset); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  |             $string[] = array_shift($charset); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  |         return implode($this->stringCombinations->glue, $string); | 
                            
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                | 126 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  |      * @inheritDoc | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  |     public function asArray() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 133 |  |  |         return iterator_to_array($this); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  |     } | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 135 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 136 |  |  |  | 
            
                        
Since your code implements the magic setter
_set, this function will be called for any write access on an undefined variable. You can add the@propertyannotation to your class or interface to document the existence of this variable.Since the property has write access only, you can use the @property-write annotation instead.
Of course, you may also just have mistyped another name, in which case you should fix the error.
See also the PhpDoc documentation for @property.