Contents

<?php

function calculate($question = "")
{
    preg_match(
        "/What is (-?\d+) (plus|minus|multiplied by|divided by) "
        . "(-?\d+)(?: (plus|minus|multiplied by|divided by) (-?\d+))?\?/",
        $question,
        $matches
    );

    if (empty($matches[2])) {
        throw new InvalidArgumentException();
    }

    switch ($matches[2]) {
        case 'plus':
            $number = $matches[1] + $matches[3];
            break;
        case 'minus':
            $number = $matches[1] - $matches[3];
            break;
        case 'multiplied by':
            $number = $matches[1] * $matches[3];
            break;
        case 'divided by':
            $number = $matches[1] / $matches[3];
            break;
        default:
            $number = 0;
    }

    if (isset($matches[4]) && isset($matches[5])) {
        switch ($matches[4]) {
            case 'plus':
                $number += $matches[5];
                break;
            case 'minus':
                $number -= $matches[5];
                break;
            case 'multiplied by':
                $number *= $matches[5];
                break;
            case 'divided by':
                $number /= $matches[5];
                break;

        }
    }

    return $number;
}

Version data entries

396 entries across 396 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/php/exercises/wordy/example.php
trackler-2.2.1.179	tracks/php/exercises/wordy/example.php
trackler-2.2.1.178	tracks/php/exercises/wordy/example.php
trackler-2.2.1.177	tracks/php/exercises/wordy/example.php
trackler-2.2.1.176	tracks/php/exercises/wordy/example.php
trackler-2.2.1.175	tracks/php/exercises/wordy/example.php
trackler-2.2.1.174	tracks/php/exercises/wordy/example.php
trackler-2.2.1.173	tracks/php/exercises/wordy/example.php
trackler-2.2.1.172	tracks/php/exercises/wordy/example.php
trackler-2.2.1.171	tracks/php/exercises/wordy/example.php
trackler-2.2.1.170	tracks/php/exercises/wordy/example.php
trackler-2.2.1.169	tracks/php/exercises/wordy/example.php
trackler-2.2.1.167	tracks/php/exercises/wordy/example.php
trackler-2.2.1.166	tracks/php/exercises/wordy/example.php
trackler-2.2.1.165	tracks/php/exercises/wordy/example.php
trackler-2.2.1.164	tracks/php/exercises/wordy/example.php
trackler-2.2.1.163	tracks/php/exercises/wordy/example.php
trackler-2.2.1.162	tracks/php/exercises/wordy/example.php
trackler-2.2.1.161	tracks/php/exercises/wordy/example.php
trackler-2.2.1.160	tracks/php/exercises/wordy/example.php