Using preg_replace need to replace random directory in an image src

Question

I have been struggling with this now for 2 hours and it's driving me nuts. And I don't think it is likely hard. I am using Wordpress and need to replace the IMG urls from an old path to a new path. Problem is..everything about the url is static except a particular directory which is random.

Example:

https://cdn2.content.mysite.com/uploads/user/76eb326b-62ff-4d37-bf4b-01a428e2f9f6/0ffd6c15-8a13-437c-9661-36edfe11cb41/Image/ b1493cd89a29c0a2d1d8e0939f05d8ee /booth_w640.jpeg

should become

/wp-content/uploads/imports/booth_w640.jpeg

The bold part is random. So I have this in my wordpress functions.php

function replace_content($content) {
    $reg = '#/https://cdn2.content.mysite.com/uploads/user/76eb326b-62ff-4d37-bf4b-01a428e2f9f6/0ffd6c15-8a13-437c-9661-36edfe11cb41/Image/([^/]+)#i';
    $rep = '/wp-content/uploads/imports';
    $content = preg_replace($reg, $rep ,$content);
    return $content;
}
add_filter('the_content','replace_content');

but that isn't working. I can't figure it out. Any help?

Answer 1

I think what you need is:

function replace_content($content) {
    $reg = '#/static-part-of-url/([^/]+)#i';
    $rep = '/wp-content/uploads/imports';
    $content = preg_replace($reg, $rep ,$content);
    return $content;
}
add_filter('the_content','replace_content');

Using a different delimiter than / is better when trying to match URLs.

Here is the script in action.

Answer 2

I determined the answer to my problem using the below code

preg_match( '/src="([^"]*)"/i', $content, $match ) ;
$getURL = $match[1];
$urlArr = explode("/",$getURL);
$fileName = end($urlArr);
$newURL = "/blog/wp-content/uploads/imports/" . $fileName;
$content = str_replace($getURL, $newURL, $content);