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@ 2017-12-08T13:53:57Z

<?php

function add($stack, $nb1, $nb2)
{
    array_push($stack, $nb1 + $nb2);
    $result = $nb1 + $nb2;
    echo $nb1 . ' + ' . $nb2 . ' = ' . $result . "\n";
}

function sub($stack, $nb1, $nb2)
{
    array_push($stack, $nb1 - $nb2);
    $result = $nb1 - $nb2;
    echo $nb1 . ' - ' . $nb2 . ' = ' . $result . "\n";
}

function div($stack, $nb1, $nb2)
{
    array_push($stack, $nb1 / $nb2);
    $result = $nb1 / $nb2;
    echo $nb1 . ' / ' . $nb2 . ' = ' . $result . "\n";
}

function mul($stack, $nb1, $nb2)
{
    array_push($stack, $nb1 * $nb2);
    $result = $nb1 * $nb2;
    echo $nb1 . ' * ' . $nb2 . ' = ' . $result . "\n";
}

function calc($input)
{
$stack = array();
$token = explode(" ", trim($input));
$count = count($token);
// echo $count . "\n";
// print_r($token);

for ($i = 0; $i < $count; $i++) {
    $tokenNUm = "";

        if (is_numeric($token[$i])) {
            array_push($stack, $token[$i]);
            print_r($token);
        } else {
            $nb2 = end($stack);
            array_pop($stack);
            $nb1 = end($stack);
            array_pop($stack);
            echo "nb1 : ". $nb1 . "\n";
            echo "nb2 : ". $nb2 . "\n";
    
            switch($token[$i]) {
            case '+':
                add($stack, $nb1, $nb2);
                break;
            case '-':
                sub($stack, $nb1, $nb2);
                break;
            case '/':
                div($stack, $nb1, $nb2);
                break;
            case '*':
                mul($stack, $nb1, $nb2);
                break;
            default:
                die('Error');
            }
        }
    
    }
    return end($stack);
}

$argv[1] = "1 + 2";

echo "Final result = " . calc($argv[1]) . "\n";

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [0] => 1 [1] => + [2] => 2 ) nb1 : nb2 : 1 + 1 = 1 Array ( [0] => 1 [1] => + [2] => 2 ) Final result = 2

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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