The post that an attachment is related to is determined by the post_parent column on the wp_posts table (depending on your database prefix). Set it to the post_ID of the parent post.
You can use “W3 Total Cache” which isn’t a static file cache system. It however uses stuff such as opcode caching, memcached, and object caching to decrease page load time. APC, or another opcache, would be a good addition to your server, as well as using a lightweight httpd instead of bloated Apache. Forcing GZIP … Read more
Use bcrypt. http://codahale.com/how-to-safely-store-a-password/
First should only disable SQL_CALC_FOUND_ROWS if you aren’t using pagination, to do so set parameter no_found_rows to true in WP_Query. WP_Query( array( ‘no_found_rows’ => true ) ); Note get_posts() does that by default.
Unless there is a core WordPress import filter available for your CMS ( see http://codex.wordpress.org/Importing_Content ) or a plugin for a CMS not covered by core WP ( see http://wordpress.org/extend/plugins/search.php?q=import ), or a Google search for your database schema doesn’t reveal anything, you need to roll your own importer. The best way is to write … Read more
You cannot suppress the quotes in $wpdb. Run mysqli_real_escape_string() in your script on these variables.
The function is update_recently_edited in wp-admin/includes/misc.php. unfortunately it is fixed at 5: function update_recently_edited( $file ) { $oldfiles = (array) get_option( ‘recently_edited’ ); if ( $oldfiles ) { $oldfiles = array_reverse( $oldfiles ); $oldfiles[] = $file; $oldfiles = array_reverse( $oldfiles ); $oldfiles = array_unique( $oldfiles ); if ( 5 < count( $oldfiles )) array_pop( $oldfiles … Read more
There are $wpdb->charset and $wpdb->collate. I am not sure if or when one of these values might be empty, so it is better to prepare for empty values … From my DB class: /** * Get table charset and collation. * * @since 2012.10.22 * @return string */ protected static function get_wp_charset_collate() { global $wpdb; … Read more
The delete_option() function will return false if the option does not exist. The update_option() function will return false if the option already has the same value as what you’re trying to update it to. Both will also return false if the SQL query itself fails for whatever reason.
You can actually use Pingdom to check for this kind of error, rather than a straight forward check for a response from the server you can configure the check to look for a particular string on the page. For instance, if your page has some kind of consistent bit of text on the homepage then … Read more