WordPress | Create a shortcode of a link based on hashed date and user role

wordpress-create-shortcode-of-link-with-date-and-user-role.php

<?php //remove this line if using in Snippets

// Usage: [auth_app_link]
add_shortcode( 'auth_app_link', 'generate_auth_app_link_shortcode' );
function generate_auth_app_link_shortcode( $atts, $content ) {

	// Set variables to create an authentication token that will be passed to some other pages
  
	// use a salt "key" to further hash the token
	$salt = 'sdfj8sad9f8jasf9jsd';
  	// grab the current date in UTC timezone with YYYYMMDD format
	$date = date('Ymd', strtotime('Now'));
	// add the salt in front of the date and then hash it
	$token = md5($salt.$date);

	// Set variables to describe the role ("translated" string) of the logged in user
  
	// set string for Subscriber role
	if( current_user_can('subscriber') ) {
		$role = 'HgDeA01kzy';
	}
	// set string for Custom role
	if( current_user_can('custom_role') ) {
		$role = '8ASJHd48sf';
	}
	// set string for Leadership role
	if( current_user_can('leadserhip') ) {
		$role = 'Sddhd875d';
	}
	// set string for Administrator role
	if( current_user_can('administrator') ) {
		$role = 'jfdsss4w3y3';
	}

	// set a variable with the URL
	$auth_link = 'https://example.com/test.php?token='. $token .'&role='. $role;
	
  	// return the URL
	return '<a href="'. $auth_link .'" target="_blank" class="auth-app-link">Access the Mobile App &raquo;</a>';

}