wt/8calc.php at master · mohammedlutf/wt · GitHub

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<?php
if (isset($_POST['sub']))
{
  $txt1=$_POST['n1'];
  $txt2=$_POST['n2'];
  $oprnd=$_POST['sub'];
  if($oprnd=="+")
  $res=$txt1+$txt2;
  else if($oprnd=="-")
  $res=$txt1-$txt2;
  else if($oprnd=="x")
  $res=$txt1*$txt2;
  else if($oprnd=="/")
  $res=$txt1/$txt2;
}
?>

<html>
<form method="post" action="">
Calculator
</br>
No1:<input name="n1" value="<?php echo $txt1; ?>" />
</br>
No2:<input name="n2" value="<?php echo $txt2; ?>"/>
</br>
Res:<input name="res" value="<?php echo $res; ?>"/>

</br>
<input type="submit" name="sub" value="+">
<input type="submit" name="sub" value="-">
<input type="submit" name="sub" value="x">
<input type="submit" name="sub" value="/">
</form>
</html>