getImgSizeFromUrl snippet for MODX. Retrieves the height and width of an image from a remote url.

getImgSizeFromUrl.snippet.php

<?php
/**
 * getImgSizeFromUrl snippet for MODX
 * Retrieves the height and width of an image from a remote url
 * 
 * example usage: [[!getImgSizeFromUrl? &url='https://path/to/myimg.jpg' &tpl=`myTpl`]]
 * placeholders to use in the myTpl chunk are [[+height]]] and [[+width]]
 *
 * @author Jon Leverrier (jon@youandmedigital.com)
 * @version 1.0
 * @since 10th December 2017
 */
 
// if the url or tpl is empty
if (empty($url && $tpl)) {
    return;
}
else {
    // fetch image from remote url
    // take width and height values from image
    list($width, $height) = getimagesize($url);
    
    // route width and height values to placeholders in tpl chunk
    $output = $modx->getChunk($tpl,array(
      'width' => $width,
      'height' => $height,
    ));
    
    return $output;
}