Simple template var replacement, but with a twist

Question

So I\'m setting up a system that has a lot of emails, and variable replacement within it, so I\'m writing a class to manage some variable replacement for templates stored in

Answer 1

$products = array('...');
function parse_products($matches)
{
    global $products;
    $str = '';
    foreach($products as $product) {
       $str .= str_replace('%product_name%', $product, $matches[1]); // $matches[1] is whatever is between {products} and {/products}
    }
    return $str;
}

$str = preg_replace_callback('#\{products}(.*)\{/products}#s', 'parse_products', $str);

The idea is to find string between {products} and {products}, pass it to some function, do whatever you need to do with it, iterating over $products array. Whatever the function returns replaces whole "{products}[anything here]{/products}".

The input string would look like that:

Requested products: {products}%product_name%{/products}