I’m trying to store an image generated with imagecreatefrompng() using the Transients API, but it just stores an empty string (string(0) “”). Also, I notice if I set the transient before imagedestroy( $im ), the image is broken and doesn’t display at all (broken image thumbnail). What can I store in the database with the … Read more
I’m working at a WordPress theme. Since I need to display featured posts, related posts, some widgets with recent posts and so on, I need to use multiple custom loops. Because of this, the number of database queries have also increased. In an attempt to optimize the theme for better performance I came across http://codex.wordpress.org/Transients_API … Read more
I noticed that some transients on my site every now and then go from having an expiration date to “Does Not Expire”. I have noticed this happening with some plugins (eg Gravity Forms) but also happening to transients I created. Any ideas? UPDATE: I am not sure how Gravity Forms sets and retrieves their transients … Read more
I use this to display all posts in all categories. $args_cat = array( // order by category name ascending ‘orderby’ => ‘name’, ‘order’ => ‘ASC’, // get only top level categories ‘parent’ => 0 ); $categories = get_categories($args_cat); // Full posts query // if there are categories filled with posts if (!empty ($categories) && !is_wp_error( … Read more
we’re using the Atlas HTML sitemap plugin, which caches the sitemap using the transients API with a call like: set_transient( ‘dmac_html_sitemap’, $output, 60*60*24*7 ); Now, we also have a multi-site setup and I was wondering where the transients are stored and if WP multisite is keeping them separate. It keeps options separate as each site(blog) … Read more
My plugin requires me to save query data for some time. The data isn’t big as such; just a couple of search parameters entered by the user so that I can use them across pagination. I’ve figured out following ways to do this: Setting up session_start() either in wp_config OR hooking it up to ‘init’ … Read more
Haven’t worked much with XML so I’m hitting a bit of a wall: function getapi() { $api_response = wp_remote_get( “http://example.com/getXML” ); $data = wp_remote_retrieve_body( $api_response ); $output = new SimpleXMLElement ($data ); return $output; } Get or set the Transient function transient() { $transient = get_transient( ‘transient_value’ ); if ( ! $transient ) { $transient … Read more
I’m working on a custom template for a new theme that uses a WP_Query instance to select posts from 2 post types with 2 custom fields that are NOT empty. Depending on the section of the site, a $current_zone variable may be set to determine the category to query from. // Custom loop $paged = … Read more
Im using a WordPress transient, which expires after an hour, to store a value which is an integer. Im trying to use switch() and multiple case() statements to evaluate if the transient exists or not (i.e true or false). Here are my questions: Which comparison operator (=, ==, ===), in example 2, is ideal for … Read more
This was really driving me crazy. I was debugging some code with code-generated transient names and they were failing like crazy for no apparent reason. After much much pain and experimentation I figured out that it fails when over certain key length: $key = ‘1234567890’; var_dump( get_transient($key) ); // works just fine var_dump( set_transient( $key, … Read more
