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class Key{
private $chars = array('1'=>'a','2'=>'b','3'=>'c','4'=>'d','5'=>'e','6'=>'f','7'=>'g','8'=>'h','9'=>'i');
private $invChars = array('9'=>'a','8'=>'b','7'=>'c','6'=>'d','5'=>'e','4'=>'f','3'=>'g','2'=>'h','1'=>'i');
private $key = "";
private $numbers = array();
public function createKey(){
for($a=0;$a<4;$a++){
$this->numbers[0] = rand(1, 9);
$this->numbers[1] = rand(1, 9);
$this->key .= $this->numbers[0].$this->invChars[$this->numbers[1]].$this->numbers[1].$this->chars[$this->numbers[0]]."-";
}
return substr_replace($this->key, '', 19, 1);
}
public function checkKey($key){
if(preg_match("/^([1-9][a-iA-I][1-9][a-iA-I][\-][1-9][a-iA-I][1-9][a-iA-I][\-][1-9][a-iA-I][1-9][a-iA-I][\-][1-9][a-iA-I][1-9][a-iA-I])$/", $key)){
$key = str_replace('-', '', $key);
if($this->chars[$key[0]] == $key[3] && $this->invChars[$key[2]] == $key[1]){
if($this->chars[$key[4]] == $key[7] && $this->invChars[$key[6]] == $key[5]){
if($this->chars[$key[8]] == $key[11] && $this->invChars[$key[10]] == $key[9]){
if($this->chars[$key[12]] == $key[15] && $this->invChars[$key[14]] == $key[13]){
return true;
}
else{
return false;
}
}
else{
return false;
}
}
else{
return false;
}
}
else{
return false;
}
}
else{
return false;
}
}
}
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