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From Web Design Ledger "13 Useful Code Snippets for WordPress Development"
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function publish_later_on_feed($where) { global $wpdb; if(is_feed()) { // timestamp in WP-format // value for wait; + device $wait = '5'; // integer // http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_timestampdiff $device = 'MINUTE'; //MINUTE, HOUR, DAY, WEEK, MONTH, YEAR // add SQL-sytax to default $where $where .= " AND TIMESTAMPDIFF($device, $wpdb->posts.post_date_gmt, '$now') > $wait "; } return $where; } add_filter('posts_where', 'publish_later_on_feed');
URL: http://webdesignledger.com/tips/13-useful-code-snippets-for-wordpress-development