CODEWITHSUNDEEP
wordpress
Venki
Venki

Reputation: 11

Is there a way to cache a query for 24 hrs in wordpress?

Would like to show a random tip from tips category in wordpress and change it every 24hrs... is it possible?

Here is my query

// Random post link 
function randomPostlink(){
$RandPostQuery = new WP_Query(array('post_type'=>array('tip'),'posts_per_page' => 1,'orderby'=>'rand'));
while ( $RandPostQuery->have_posts() ) : $RandPostQuery->the_post();
echo the_permalink();
endwhile;
wp_reset_postdata();
}

Upvotes: 1

Views: 658

Answers (3)

flomei
flomei

Reputation: 880

Adding to Jenis it might be interesting to delete the cache if a new post is published, you can do it with a little hook.

(At least that´s what I am doing when using the Transients API to cache results.)

// Delete caches, when a new post is published
function delete_cache_after_publishing_new()  {
delete_transient('your_cache_1');
delete_transient('your_cache_2');
}
add_action('publish_post','delete_cache_after_publishing_new')

Upvotes: 0

Vincent B
Vincent B

Reputation: 431

Use the Transients API

You can use the class Transients API which can store your data with a expire time in seconds.

So, here is the modified code :

<?php
// Your function
function randomPostlink(){

    // Get the cache data
    $rand_tip = get_transient( 'rand_tip' );

    // Launch the request if the data do not exist or the data has expired
    if ( $rand_tip === false ) {

        // Args for the WP_Query
        $args = array(
            'post_type' => array( 'tip' ),
            'posts_per_page' => 1,
            'orderby'=>'rand'
        );

        // Generate the datas
        $rand_tip = new WP_Query($args);

        // Set the ID of the request
        set_transient( 'rand_tip', $rand_tip, 24 * HOUR_IN_SECONDS );       
    }

    // Loop the posts
    if ( $rand_tip->have_posts() ) {
        while ( $rand_tip->have_posts() ) : $rand_tip->the_post();

            // Echo the permalink
            the_permalink();

        endwhile;

        // Reset the post data
        wp_reset_postdata();

    }
}
?>

Upvotes: 1

Jenis Patel
Jenis Patel

Reputation: 1613

You can make use of WP Transients API and use it something like that :

 <?php 
    // Check for transient. If none, then execute WP_Query
    if ( false === get_transient( 'special_query_results' ) ) {

          $RandPostQuery = new WP_Query(array('post_type'=>array('tip'),'posts_per_page' => 1,'orderby'=>'rand'));

        // Put the results in a transient. Expire after 24 hours.
        set_transient( 'special_query_results', $RandPostQuery , 24 * HOUR_IN_SECONDS );
    } ?>

Hope it helps you.

Upvotes: 3

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