带有多个变量的PHP preg_replace

Question

I have the following short code I want to use to automatically generate Amazon Affiliate links in my posts [amazon region=com asin=xxxxxx].

How can I get the 'region' a and 'asin' from this string and convert every occurrence of it into my php function getAffiliateLink("com","xxxxxxxx")?

I can have multiple of these strings with different numbers on the page.

I have been looking into preg_replace and regex but I can't figure out how to do this for this particular example.

Answer 1

Ok so I found the solution. Because I want to replace the string with a function, I had to use preg_replace_callback().

This is my working solution:

$content = preg_replace_callback('/\[amazon region=([^\b]+) asin=([^\b]+)\]/', 'callback', $content);

function callback ($matches) {
    print_r($matches);
    return getAffiliateLink("$matches[1]","$matches[2]");
}

echo $content;