Modify User Verification URL Expiration

function kjm_modify_user_verification_url_expiration( $url ) {

	// EDD default is '+24 hours'. 'days' also works

	$url   = add_query_arg( 'ttl', strtotime( '+48 hours' ), $url );

	return $url;

}

add_filter( 'edd_get_user_verification_url', 'kjm_modify_user_verification_url_expiration' );