Save external image and rename it in Processwire #pw

save-external-image-and-save-it.php

<?php 

// 1. We generate a static image from Mapbox's static Maps API.
// 2. We save it to an image field
// 3. We rename it to a more comprehensible filename, and then we add an extension (png by default for Mapbox). 
// View investigacioncontemporanea.com -> "university" template for example of implementation.

if (!$page->image) {
      $p = $page;
      $p->of(false);
      $p->image->add("https://api.mapbox.com/styles/v1/mapbox/dark-v10/static/pin-s-r+d29b31($long,$lat)/$long,$lat,$zoom,0,0/629x250?access_token=API_KEY_HERE");
      $p->image->first->rename("{$p->title}.png");
      $p->save();
    } else {
      echo "<img src='{$page->image->url}' alt='$page->title'>";
    }