<?php
/**
 * This changes email settings after someone logs in to force specific settings for everyone.
 */
function wp_256_change_email_settings_after_login( $user_login, $user ) {
    // get roles data
	$user_info = get_userdata( $user->ID );

	// if project_client role, turn off comment notifications
	foreach ( $user_info->roles as $role ) {
		if ( 'project_client' === $role ) {
			update_user_meta( $user->ID, 'ph_comments', 'off' );
			update_user_meta( $user->ID, 'ph_image_approvals', 'off' );
			update_user_meta( $user->ID, 'ph_project_approvals', 'off' );
			update_user_meta( $user->ID, 'ph_resolves', 'off' );
			update_user_meta( $user->ID, 'ph_assigns', 'off' );
		}
	}
}
add_action('wp_login', 'wp_256_change_email_settings_after_login', 10, 2);