format_price

/**
 * Helper for quick price formatting
 *
 * @param float $price
 * @param bool|string $pattern
 * @return string
 * <code>
 * format_price(45689.95); // 45 689.95
 * format_price(45689.0); // 45 689
 * format_price(45689.95, '%price% руб.'); // 45 689.95 руб.
 * </code>
 */
function format_price($price, $pattern = false)
{
    $price = number_format($price, 2, '.', ' ');
    if (substr($price, -3) === '.00') {
        $price = substr($price, 0, -3);
    }
    if ($pattern) {
        $price = str_replace('%price%', $price, $pattern);
    }
    return $price;
}