Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
WordPress Transients Tutorial, Part 2
<?php
/**
* Get Books posts.
*
* This is from a tutorial found here:
* @link https://johnregan3.wordpress.com/how-to-improve-wordpress-load-times-using-transients
*
* @since 1.0.0
*
* @param array $genre_array An array of genre slugs.
* @param array $publisher_array An array of publisher slugs.
*
* @return array Array of books, else an empty array.
*/
function jr3_get_books( $genre_array, $publisher_array ) {
/*
* For the sake of this tutorial, we'll assume
* $genre_array and $publisher_array are valid arrays.
*/
$wp_query_args = array(
'post_type' => 'book',
'tax_query' => array(
'relation' => 'OR',
array(
'taxonomy' => 'genre',
'field' => 'slug',
'terms' => $genre_array,
),
array(
'taxonomy' => 'publisher',
'field' => 'slug',
'terms' => $publisher_array,
),
),
);
// Generate the transient name.
$transient_name = 'jr3_' . md5( maybe_serialize( $wp_query_args ) );
$books = get_transient( $transient_name );
if ( ( false === $books ) || ( ! is_array( $books ) ) ) {
$books = array();
// Run the Query.
$query = new WP_Query( $wp_query_args );
if ( is_array( $query->posts ) ) {
// Rename for output.
$books = $query->posts;
// Set our transient using our generated name.
set_transient( $transient_name, $books, HOUR_IN_SECONDS );
}
}
return $books;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.