Shopping Cart and leading zeros issue

Showing prices brings internationalization aspect to be solved. But if you are sure that you would work with dollars only, some quick helper functions could be applied.

File: price_helper.php

Code:

<?php defined('BASEPATH') OR exit('No direct script access allowed');

// Adapted for dollar currency

function price_format($value, $show_zero_price = true) {

    $price = price_parse($value);

    $price = number_format($price, 2, '.', ' ');

    if (!$show_zero_price) {

        $price_test = price_parse($price);

        if (empty($price_test)) {
            return '';
        }
    }

    return $price;
}

function price_parse($value) {

    return round((float) str_replace(array(',', ' '), array('.', ''), trim((string) $value)), 2);
}

Testing:

Code:

echo price_format('5').' USD';
echo '<br />';
echo price_format(5).' USD';
echo '<br />';
echo price_format('0');
echo '<br />';
echo price_format('0.0');
echo '<br />';
echo price_format(0);
echo '<br />';
echo price_format(0.0);
echo '<br />';
echo price_format('0', false);
echo '<br />';
echo price_format('0.0', false);
echo '<br />';
echo price_format(0, false);
echo '<br />';
echo price_format(0.0, false);
echo '<br />';
echo price_format('5 000').' USD';
echo '<br />';
echo price_format('5 000.0').' USD';
echo '<br />';
echo price_format(5000).' USD';
echo '<br />';
echo price_format(5000000).' USD';
echo '<br />';
echo price_format(-5000000).' USD';