custom-wp-config.php

if ( ! defined( 'WP_HOME' ) ) {
  $protocol = ( isset( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] ) ? 'https' : 'http';
  define( 'WP_HOME', $protocol . '://' . $_SERVER['SERVER_NAME'] );
}
if ( ! defined( 'WP_SITEURL' ) ) {
  define( 'WP_SITEURL', WP_HOME . '/wordpress' );
}

define('WP_CONTENT_DIR', dirname(__FILE__) . '/htdocs/wp-content');

if ( ! defined( 'WP_CONTENT_URL' ) ) {
  define('WP_CONTENT_URL', WP_HOME . '/wp-content');
}

if (getenv('WP_ENV') != false) {
    // Filter non-alphabetical characters for security                                                          
    #echo "inside if";                                                                                          
    define('WP_ENV', preg_replace('/[^a-z]/', '', getenv('WP_ENV')));
}

include 'wp-config.' . WP_ENV . '.php';