Untitled

<html>
<input type="submit" name="dodaj(1)" value="1" />
<input type="submit" name="dodaj(2)" value="2" />
<input type="submit" name="3" value="3" /></br>
<input type="submit" name="4" value="4" />
<input type="submit" name="5" value="5" />
<input type="submit" name="6" value="6" /></br>
<input type="submit" name="7" value="7" />
<input type="submit" name="8" value="8" />
<input type="submit" name="9" value="9" /></br>
<input type="submit" name="+" value="+" />
<input type="submit" name="-" value="-" />
<input type="submit" name="*" value="*" />
<input type="submit" name="/" value="/" />


<form action="" method="POST" >
<input type="text" name="oblicz" id="oblicz" /></br>
<input type="submit" value="Policz" />
</form>


<script>
function dodaj(
var element = document.getElementById("demo");


</script>


<?php
function calculate_string( $mathString )    {
    $mathString = trim($mathString);     // biale znaki
    $mathString = preg_replace('[^0-9\+-\*\/\(\) ]', '', $mathString);
	// usun operatora
    $compute = create_function("", "return (" . $mathString . ");" );
    return 0 + $compute();
}

$string = $_POST['oblicz'];
echo calculate_string($string);

?>

<html>