gówno

<?php
function findSolution($firstArgument,$secondArgument, $symbol,$result){
  $possibleAnswers = array();
  $x = ($firstArgument.$secondArgument.$result);

  $distinctLetters = array_unique(str_split($x));
  $lastLetter = end($distinctLetters);
  $iterator = 0;
  $variablesDictionary = array();
  foreach ($distinctLetters as $letter){
    $variablesDictionary[$letter] = -1;
  }
  findSolutionRecursion($lastLetter, $iterator, $variablesDictionary, $firstArgument, $secondArgument, $result, $symbol, $possibleAnswers);
  return $possibleAnswers;
}

function findSolutionRecursion($lastCharacter, $iterator, &$variablesDictionary,
    $firstArgument, $secondArgument, $result, $symbol, &$possibleAnswers){
      $key = array_keys($variablesDictionary)[$iterator];

      $iterator++;
      if (strcmp($lastCharacter, $key) == 0) {

        for ($i = 0; $i < 10; $i++)
        {
          $variablesDictionary[$key] = $i;
          $firstArgumentToInt = "";
          $secondArgumentToInt = "";
          $resultToInt = "";

          for ($j = 0; $j < strlen($firstArgument); $j++)
          {
              $firstArgumentToInt .= strval($variablesDictionary[$firstArgument[$j]]);
          }
          for ($j = 0; $j < strlen($secondArgument); $j++)
          {
              $secondArgumentToInt .= strval($variablesDictionary[$secondArgument[$j]]);
          }
          for ($j = 0; $j < strlen($result); $j++)
          {
              $resultToInt .= strval($variablesDictionary[$result[$j]]);
          }

          $firstArg = intval($firstArgumentToInt);
          $secondArg = intval($secondArgumentToInt);
          $possibleResult = intval($resultToInt);
          #echo($firstArg . "+" . $secondArg . "=" . $possibleResult . "</br>");
          switch ($symbol)
          {
              case "+":
                  if ($firstArg + $secondArg == $possibleResult)
                  {
                    $possSolution = new possibleSolution();
                    $possSolution->possibleAnswer = ($firstArgumentToInt . "+" . $secondArgumentToInt . "=" . $resultToInt);
                    $possSolution->possibleVariablesDictionary = $variablesDictionary;
                    array_push ($possibleAnswers,$possSolution);
                  }
                  break;
              case "-":
                  if ($firstArg - $secondArg == $possibleResult)
                  {
                    $possSolution = new possibleSolution();
                    $possSolution->possibleAnswer = ($firstArgumentToInt . "-" . $secondArgumentToInt . "=" . $resultToInt);
                    $possSolution->possibleVariablesDictionary = $variablesDictionary;
                    array_push ($possibleAnswers,$possSolution);
                  }
                  break;
              case "*":
                  if ($firstArg * $secondArg == $possibleResult)
                  {
                    $possSolution = new possibleSolution();
                    $possSolution->possibleAnswer = ($firstArgumentToInt . "*" . $secondArgumentToInt . "=" . $resultToInt);
                    $possSolution->possibleVariablesDictionary = $variablesDictionary;
                    array_push ($possibleAnswers,$possSolution);
                  }
                  break;
              case "/":
                  if ($firstArg / $secondArg == $possibleResult)
                  {
                    $possSolution = new possibleSolution();
                    $possSolution->possibleAnswer = ($firstArgumentToInt . "/" . $secondArgumentToInt . "=" . $resultToInt);
                    $possSolution->possibleVariablesDictionary = $variablesDictionary;
                    array_push ($possibleAnswers,$possSolution);
                  }
                  break;

              default:
                  break;
          }
        }
        return;
    }
    else
    {
      for ($i = 0; $i < 10; $i++)
      {
          $variablesDictionary[$key] = $i;

          findSolutionRecursion($lastCharacter, $iterator, $variablesDictionary, $firstArgument, $secondArgument, $result, $symbol, $possibleAnswers);
      }
    }
}

class possibleSolution
{
    public $possibleAnswer;
    public $possibleVariablesDictionary;

    function ToString()
    {
        $dictionary = "";
        foreach($this->possibleVariablesDictionary as $key=>$value)
        {
            $dictionary .= ($key . "=" . $value . ", ");
        }
        return $this->possibleAnswer . "</br>" . $dictionary;
    }
}
$solutions = findSolution("ALA","MA","+","ASA");

foreach($solutions as $sol){
  echo ($sol->ToString() . "</br>");
}

?>