Reverse preg_replace

Question

I have regex like this:

^page/(?P\\d+)-(?P[^\\.]+)\\.html$

and an array:

$args = array(
    \'id\' =&         


        

Answer 1

Interesting challenge, I coded something that works for this sample, note that you need PHP 5.3+ for this code to work:

$regex = '^page/(?P<id>\d+)-(?P<slug>[\.]+)\.html$';
$args = array(
    'id' => 5,
    'slug' => 'my-first-article'
);

$result = preg_replace_callback('#\(\?P<(\w+)>[^\)]+\)#', function($m)use($args){
    if(array_key_exists($m[1], $args)){
        return $args[$m[1]];
    }
}, $regex);

$result = preg_replace(array('#^\^|\$$#', '#\\\\.#'), array('', '.'), $result); // To remove ^ and $ and replace \. with .
echo $result;

Output: page/5-my-first-article.html

Online demo.