[PHP] QuizCalc (Quiz-Rechenfragen-Script)

[aspire]

hi, kleines script zu quiz-rechenfragen.

<?php
  function calcWithMode($mode, $num1, $num2)
  {
    if($mode == 1)
      return $num1 + $num2;
    if($mode == 2)
      return $num1 - $num2;
    if($mode == 3)
      return $num1 * $num2;
    if($mode == 4)
      return $num1 / $num2;
    return null;
  }
  
  function quizCalc($qCalc) 
  {
    if(strstr($qCalc, ":", true) == "Nennen Sie die gesuchte Zahl")
    {
      if(strpos(strstr($qCalc, ":"), "???") != false)
        {
        $qCalc = substr($qCalc, 30);
        $num1 = null;
        $num2 = null;
        $rest = null;
        $calcMode = 0;
        $c = -1;
        $xLoc = -1;
        $equalLoc = -1;
        $result = -1;
        foreach(split(" ", $qCalc) as $part)
        {
          $c++;
          if(is_numeric($part))
          {
            if(!isset($num1))
              $num1 = $part;
            elseif(!isset($num2))
              $num2 = $part;
            elseif(!isset($rest))
              $rest = $part;
          }
          if($part == "plus")
            $calcMode = 1;
          else if($part == "minus")
            $calcMode = 2;
          else if($part == "mal")
            $calcMode = 3;
          else if($part == "durch")
            $calcMode = 4;
          
          if($part == "???")
            $xLoc = $c;
          if($part == "=")
            $equalLoc = $c;
        }
 
        if($equalLoc == 1)
        {
          if($xLoc == 0)
            $result = calcWithMode($calcMode, $num1, $num2);
          
          if($xLoc == 2 || $xLoc == 4)
            if($calcMode == 1 || $calcMode == 2)
              $result = calcWithMode($calcMode, $num1, -$num2);
            else if($calcMode == 3)
              $result = calcWithMode(4, $num1, $num2);
            else if($calcMode == 4)
              $result = calcWithMode(3, $num1, $num2);
        }
        else if($equalLoc == 3)
        {
          if($xLoc == 0)
            if($calcMode == 1 || $calcMode == 2)
              $result = calcWithMode($calcMode, $num2, -$num1);
            else if($calcMode == 3)
              $result = calcWithMode(4, $num2, $num1);
            else if($calcMode == 4)
                $result = calcWithMode(3, $num2, $num1);
            
          if($xLoc == 2)
            if($calcMode == 1)
              $result = calcWithMode($calcMode, $num2, -$num1);
            else if($calcMode == 2)
              $result = calcWithMode($calcMode, $num2, $num1) / -1;
            else if($calcMode == 3)
              $result = calcWithMode(4, $num2, $num1);
            else if($calcMode == 4)
             $result = calcWithMode(4, $num1, $num2);
           
          if($xLoc == 4)
            $result = calcWithMode($calcMode, $num1, $num2);
         }
        if(isset($rest) && $rest != 0)
        {
          if($xLoc == 0)
            $result = ($num1 * $num2) + $rest;
          
          if($xLoc == 2 || $xLoc == 4)
            $result = ($num1 - $rest) / $num2;
        }
        return $result;
      }
    }
    return null;
  }
?>

Beispiel:

<?php
  include("quizcalc.php");
  header('Content-type: text/plain; charset=utf-8');

  if(isset($_GET['q']))
  {
    print(quizCalc($_GET['q']));
  }
?>

Aufruf mit "Nennen Sie die gesuchte Zahl: 34 durch ??? = 3 Rest 1":

http://127.0.0.1/quizcalc.php?q=Nennen%20Sie%20die%20gesuchte%20Zahl:%2034%20durch%20???%20=%203%20Rest%201

-> "11"


Coded by me. Have fun.

-aspire