PMPro Customizations to allow non-members to view restricted posts if they are less than 30 days old.

open-new-posts-to-non-members.php

<?php // do not include this line
/**
 * Allow non-members to view restricted posts if they are less than 30 days old.
 *
 * Add this code to a custom plugin.
 *
 * Change the '-30 Days' below if you'd like to allow access for longer or shorter.
 */
/**
 * [open_new_posts_to_non_members description]
 *
 * @param  [type] $hasaccess              [description]
 * @param  [type] $thepost                [description]
 * @param  [type] $theuser                [description]
 * @param  [type] $post_membership_levels [description]
 * @return [type]                         [description]
 */
function open_new_posts_to_non_members( $hasaccess, $thepost, $theuser, $post_membership_levels ) {
	global $wpdb;

	// if PMPro says true already, return true
	if ( $hasaccess ) {
		return $hasaccess;
	}

	// figure out dates to check
	$cutoff = strtotime( '-30 Days', current_time( 'timestamp' ) );
	$published = strtotime( $thepost->post_date, current_time( 'timestamp' ) );

	// if published after the cuttoff, then allow access for now
	if ( $published > $cutoff ) {
		$hasaccess = true;
	}

	return $hasaccess;
}
add_filter( 'pmpro_has_membership_access_filter', 'open_new_posts_to_non_members', 10, 4 );