<?php
class Stack {
public $array = array();
public $index = -1;
public function isEmpty()
{
if($this->index == -1){
return true;
}else{
return false;
}
}
public function push($element)
{
$this->index++;
$this->array[$this->index] = $element;
}
public function pop()
{
//return $this->array[$this->index--];
if($this->isEmpty()){
echo 'Nothing to pop';
}else{
$element = $this->array[$this->index];
unset($this->array[$this->index]);
$this->index--;
return $element;
}
}
public function calculator($value1, $value2, $operator){
if($operator == "+"){
$result = $value1 + $value2;
} elseif($operator == "-"){
$result = $value1 - $value2;
} elseif($operator == "*"){
$result = $value1 * $value2;
} elseif($operator == "/"){
$result = $value1 / $value2;
}
return $result;
}
}
$stack = new Stack();
if(isset($_POST['numbers'])){
$numbers = trim($_POST['numbers']);
$numbers = explode(' ', $numbers);
foreach ($numbers as $number) {
if(is_numeric($number)) {
$number = intval($number);
$stack->push($number);
}else{
$value2 = $stack->pop();
$value1 = $stack->pop();
$result = $stack->calculator($value1, $value2, $number);
$stack->push($result);
}
}
$result = $stack->pop();
echo $result;
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<form method="post" action="">
<input type="text" name="numbers" id="">
<input type="submit" name="submit" id="">
</form>
</body>
</html>
class Stack {
public $array = array();
public $index = -1;
public function isEmpty()
{
if($this->index == -1){
return true;
}else{
return false;
}
}
public function push($element)
{
$this->index++;
$this->array[$this->index] = $element;
}
public function pop()
{
//return $this->array[$this->index--];
if($this->isEmpty()){
echo 'Nothing to pop';
}else{
$element = $this->array[$this->index];
unset($this->array[$this->index]);
$this->index--;
return $element;
}
}
public function calculator($value1, $value2, $operator){
if($operator == "+"){
$result = $value1 + $value2;
} elseif($operator == "-"){
$result = $value1 - $value2;
} elseif($operator == "*"){
$result = $value1 * $value2;
} elseif($operator == "/"){
$result = $value1 / $value2;
}
return $result;
}
}
$stack = new Stack();
if(isset($_POST['numbers'])){
$numbers = trim($_POST['numbers']);
$numbers = explode(' ', $numbers);
foreach ($numbers as $number) {
if(is_numeric($number)) {
$number = intval($number);
$stack->push($number);
}else{
$value2 = $stack->pop();
$value1 = $stack->pop();
$result = $stack->calculator($value1, $value2, $number);
$stack->push($result);
}
}
$result = $stack->pop();
echo $result;
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<form method="post" action="">
<input type="text" name="numbers" id="">
<input type="submit" name="submit" id="">
</form>
</body>
</html>
