How to remove part of a url?

Question

Trying to turn this:

href="/wp-content/themes/tray/img/celebrity_photos/photo.jpg"

into:

href="/img/celebrity_photos/photo.jpg"

So I'm simply trying to remove /wp-content/themes/tray/ from the url.

Here's the plug in's PHP code that builds a variable for each anchor path:

$this->imageURL = '/' . $this->path . '/' . $this->filename;

So I'd like to say:

$this->imageURL = '/' . $this->path -/wp-content/themes/tray/ . '/' . $this->filename;

PHP substr()? strpos()?

Answer 1

Given that:

$this->imageURL = '/' . $this->path . '/' . $this->filename;
$remove = "/wp-content/themes/tray";

This is how to remove a known prefix, if it exists:

if (strpos($this->imageURL, $remove) === 0) {
    $this->imageURL = substr($this->imageURL, strlen($remove));
}

If you are certain that it always exists then you can also lose the if condition.