Plugin resource paths wrong with specific WP configuration

[presidentnickson]

Description of Problem

In a specific Wordpress configuration, there is an issue with the paths used to load the plugin resources.

Details

Wordpress is installed in a subdirectory /wp/ - while the content folder sits along side in /wp-content/

So :
base path is https://www.examplesite.com/wp
wp-content path is https://www.examplesite.com/wp-content

In this scenario, the plugin attempts to load the following :

https://www.examplesite.com/wp/-content/plugins/simple-lightbox/client/css/app.css?ver=2.9.3

As you can see, it's mangled this part of the path : /wp/-content/

I think the root of the problem lies in the get_relative_path() function in /simple-lightbox/includes/class.utilities.php

In here we have :

$relative is https://www.examplesite.com/wp
$path is https://www.examplesite.com/wp-content/plugins/simple-lightbox

With these values, $path = substr( $path, strlen( $relative ) ); will return -content/plugins/simple-lightbox

[archetyped]

Thank you for the report.

So that your issue can be reproduced, please provide details on the specific WP constants and/or admin options (including their customized values) that have been modified for your configuration.

[presidentnickson]

Here is what has been added into wp-config.php to allow for this configuration :

/**
 * Set custom paths
 *
 * These are required because wordpress is installed in a subdirectory.
 */
if (!defined('WP_SITEURL')) {
	define('WP_SITEURL', 'https://' . $_SERVER['SERVER_NAME'] . '/wp');
}
if (!defined('WP_HOME')) {
	define('WP_HOME',    'https://' . $_SERVER['SERVER_NAME'] . '');
}
if (!defined('WP_CONTENT_DIR')) {
	define('WP_CONTENT_DIR', dirname(__FILE__) . '/wp-content');
}
if (!defined('WP_CONTENT_URL')) {
	define('WP_CONTENT_URL', 'https://' . $_SERVER['SERVER_NAME'] . '/wp-content');
}

[archetyped]

Thank you, I will look into it.