LLMS_Cache_Helper::maybe_no_cache()

Define nocache constants and set nocache headers on specified pages

Contents

Description Description

This prevents caching for the Checkout & Student Dashboard pages.

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Return Return

(void)

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Source Source

File: includes/class.llms.cache.helper.php

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public function maybe_no_cache() {
 
    if ( ! is_blog_installed() ) {
        return;
    }
 
    /**
     * Filter the list of pages that LifterLMS will send nocache headers for.
     *
     * @since 3.15.0
     *
     * @param int[] $ids List of WP_Post IDs.
     */
    $ids = apply_filters(
        'llms_no_cache_page_ids',
        array(
            llms_get_page_id( 'checkout' ),
            llms_get_page_id( 'myaccount' ),
        )
    );
 
    /**
     * Filter whether or not LifterLMS will send nocache headers.
     *
     * @since 6.4.0
     *
     * @param bool $no_cache Whether or not LifterLMS will send nocache headers.
     */
    $do_not_cache = apply_filters( 'llms_no_cache', is_page( $ids ) || is_quiz() );
 
    if ( $do_not_cache ) {
 
        add_filter( 'nocache_headers', array( __CLASS__, 'additional_nocache_headers' ), 99 );
 
        llms_maybe_define_constant( 'DONOTCACHEPAGE', true );
        llms_maybe_define_constant( 'DONOTCACHEOBJECT', true );
        llms_maybe_define_constant( 'DONOTCACHEDB', true );
        nocache_headers();
        $this->exclude_page_from_wpe_server_cache();
 
        remove_filter( 'nocache_headers', array( __CLASS__, 'additional_nocache_headers' ), 99 );
 
    }
 
}

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Uses Uses

Uses
Uses Description
includes/class.llms.cache.helper.php: LLMS_Cache_Helper::exclude_page_from_wpe_server_cache()

Sets a browser cookie that tells WP Engine to exclude a page from server caching.
includes/class.llms.cache.helper.php: llms_no_cache

Filter whether or not LifterLMS will send nocache headers.
includes/class.llms.cache.helper.php: llms_no_cache_page_ids

Filter the list of pages that LifterLMS will send nocache headers for.
includes/functions/llms-functions-conditional-tags.php: is_quiz()

Determine if a single Quiz is being displayed.
includes/llms.functions.core.php: llms_maybe_define_constant()

Define a constant if it’s not already defined
includes/functions/llms.functions.page.php: llms_get_page_id()

Retrieve the WordPress Page ID of a LifterLMS Core Page.
Show 1 more use Hide more uses

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Changelog Changelog

Changelog
Version Description
6.6.0 Added WP Engine server-side cache exclusions.
6.4.0 Force no caching on quiz pages. Added 'no-store' to the default WordPress nocache headers.
3.15.0 Introduced.

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