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WP_Object_Cache::set( int|string $key, mixed $data, string $group = 'default', int $expire )

Sets the data contents into the cache.

Description

The cache contents are grouped by the $group parameter followed by the $key. This allows for duplicate ids in unique groups. Therefore, naming of the group should be used with care and should follow normal function naming guidelines outside of core WordPress usage.

The $expire parameter is not used, because the cache will automatically expire for each time a page is accessed and PHP finishes. The method is more for cache plugins which use files.

Parameters

$key

(int|string) (Required) What to call the contents in the cache.

$data

(mixed) (Required) The contents to store in the cache.

$group

(string) (Optional) Where to group the cache contents.

Default value: 'default'

$expire

(int) (Optional) Not Used.

Return

(true) Always returns true.

Source

File: wp-includes/cache.php

public function set( $key, $data, $group = 'default', $expire = 0 ) {
		if ( empty( $group ) ) {
			$group = 'default';
		}

		if ( $this->multisite && ! isset( $this->global_groups[ $group ] ) ) {
			$key = $this->blog_prefix . $key;
		}

		if ( is_object( $data ) ) {
			$data = clone $data;
		}

		$this->cache[ $group ][ $key ] = $data;
		return true;
	}

Changelog

Version Description
2.0.0 Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/classes/WP_Object_Cache/set