Resize WordPress images on the fly vt_resize w/ multisite support

vt_resize.php

<?php 
/*
 * Resize images dynamically using wp built in functions.
 * Update: Use WP_Image_Editor class instead of deprecated image_resize.
 * Updated by Joel Lisenby (original function by Victor Teixeira)
 *
 * php 5.2+
 *
 * Example use:
 * 
 * <?php
 * $thumb = get_post_thumbnail_id(); 
 * $image = vt_resize( $thumb,'' , 140, 110, true );
 * ?>
 * <img src="<?php echo $image[url]; ?>" width="<?php echo $image[width]; ?>" height="<?php echo $image[height]; ?>" />
 *
 * @param int $attach_id
 * @param string $img_url
 * @param int $width
 * @param int $height
 * @param bool $crop
 * @return array
 */

function vt_resize( $attach_id = null, $img_url = null, $width, $height, $crop = false ) {
	
	if( $attach_id ) {
		$img_url = get_attached_file( $attach_id );
	}

	$old_img_info = pathinfo( $img_url );
	$old_img_ext = '.'. $old_img_info['extension'];
	$old_img_path = $old_img_info['dirname'] .'/'. $old_img_info['filename'];
	
	$new_img_dir = str_replace(ABSPATH, '/', $old_img_info['dirname']);
	$new_img_path = $old_img_path .'-'. $width .'x'. $height . $old_img_ext;
	$new_img = wp_get_image_editor( $img_url );
	$new_img->resize( $width, $height, $crop );
	$new_img = $new_img->save( $new_img_path );

	$vt_image = array (
		'url' => $new_img_dir .'/'. $new_img['file'],
		'width' => $new_img['width'],
		'height' => $new_img['height']
	);
	
	return $vt_image;
	
}

Thanks for the script.

line 39 needs to be changed to
$new_img = $new_img->save( $new_img_path );

Thanks! Updated... better late than never :)

check if file_exists($new_img_path) before doing the resize?