Setting up ngrok with Valet for WordPress use

shell.sh

# note this uses `ngrok` directly opposite `valet share`
# the `-host-header` param is essential and you can also configure that in `~/ngrok2/ngrok.yml` eventually
# in which case it should work also by simply calling `valet share` from the parked site root

ngrok http --host-header=rewrite https://your-valet-url.test

wp-config.php

<?php

// insert these lines at the beginning of wp-config.php

if ( isset( $_SERVER['HTTP_X_FORWARDED_HOST'] ) ) {
	$url = $_SERVER['HTTP_X_FORWARDED_HOST'];
} elseif ( ! empty( $_SERVER['HTTP_HOST'] ) ) {
	$url = $_SERVER['HTTP_HOST'];
} else {
	$url = 'https://your-valet-url.test'; // this fallback should not be necessary
}

define( 'WP_HOME', 'https://' . $url );
define( 'WP_SITEURL', WP_HOME );