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                <?php  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                namespace raphiz\passwordcards;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                class Configuration  | 
            
            
                                                                        
                            
            
                                    
            
            
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                { | 
            
            
                                                                        
                            
            
                                    
            
            
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                    const DEFAULT_PATTERN = 'a-zA-Z0-9~*-*';  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    const LOWER = "abcdefghijklmnopqrstuvwxyz";  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    const UPPER = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    const NUMBERS = "0123456789";  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    const SYMBOLS = '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'; | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $seed = null;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $pattern = null;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $primaryColor = null;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $secondaryColor = null;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $text = null;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public $keys = null;  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function __construct($seed, $pattern, $keys, $spaceBarSize, $text, $primaryColor, $secondaryColor)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->seed = self::evalSeed($seed);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->pattern = self::evalPattern($pattern);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->keys = self::evalKeys($keys);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->primaryColor = $primaryColor;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->text = $text;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $this->spaceBarSize = $spaceBarSize;  | 
            
                            
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                        $this->secondaryColor = $secondaryColor;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public function getPatternCharacters()  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return str_split(self::completePattern($this->pattern));  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    public static function completePattern($pattern)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $pattern = str_replace('a-z', self::LOWER, $pattern); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $pattern = str_replace('A-Z', self::UPPER, $pattern); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $pattern = str_replace('0-9', self::NUMBERS, $pattern); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        $pattern = str_replace('*-*', self::SYMBOLS, $pattern); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $pattern;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     * If no (numeric) seed is provided, generate one.  | 
            
            
                                                                        
                            
            
                                    
            
            
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                     */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public static function evalSeed($seed)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($seed === null || !is_numeric($seed)) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            list($usec, $sec) = explode(' ', microtime()); | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $seed = (float) $sec + ((float) $usec * 100000);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $seed;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    * If no pattern is provided, return the default.  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public static function evalPattern($pattern)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if ($pattern === null) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            $pattern = self::DEFAULT_PATTERN;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return $pattern;  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    /**  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    * If no keys are provided, use qwerty.  | 
            
            
                                                                        
                            
            
                                    
            
            
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                    */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    public static function evalKeys($keys)  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Return qwertz  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        if (strtolower($keys) === 'qwertz') { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                            return 'QWERTZUIOPASDFGHJKLYXCVBNM';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        }  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        // Return qwerty  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        return 'QWERTYUIOPASDFGHJKLZXCVBNM';  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                    }  | 
            
            
                                                        
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: