Question

Here is my code… basically it finds any page-NUMBER- within a variable and then replaces it with a page url from an array

$content_text = preg_replace("/page-(\d+)-/sie", '$pageurl[$1]', $content_text);

It works a treat until the NUMBER it finds isn’t in the array and it returns an error…

Is there another efficient way I could do this instead?

I liked my code above because it was simple but I may have to use more complex code…

Answer 1

Syntax might not be 100% correct but;

$content_text = preg_replace_callback('/page-(\d+)-/sie',
    create_function('$number',
                    'global $pageurl;
                    if (in_array($number, $pageurl)){
                        return $pageurl[$number];
                    }else{
                        /*do something*/
                    };'),
    $content_text);

EDIT Forgot to include “global $pageurl;” to be able to access the variable inside the function.