[WordPress] Adding a Plugin Settings Link

00-settings.php

<?php
add_filter('plugin_action_links_' . plugin_basename(__FILE__), __NAMESPACE__ . '\\acme_settings_link' );
/**
 * Creates a Settings link that links the users directly to the Settings page from the admin
 * screen.
 *
 * @param array $links The list of links to appear under the plugin title.
 * @return array $links The updated array of links including the 'Settings' link.
 */
function acme_settings_link($links) {

	// Build the URL.
	$url = add_query_arg(
		'page',
		'acme-plugin',
		get_admin_url() . 'admin.php'
	);

	// Create the link.
	$settings_link = "<a href='$url'>" . __( 'Settings' ) . '</a>';

	// Adds the link to the end of the array.
	array_push(
		$links,
		$settings_link
	);

	return $links;
}