apply_filters( ‘site_status_page_cache_supported_cache_headers’, array<string, )

Filters the list of cache headers supported by core.

Description

This list indicates how each of the specified headers will be checked to indicate if a page cache is enabled or not. WordPress checks for each of the headers in the returned array. If the callback is provided, it will be passed the value for the corresponding header and return a boolean value indicating if the header suggests that a cache is active. If the value is null for the header, then WordPress will assume that a cache is active if the header is present, regardless of its value.

Parameters

?callable> $cache_headers Mapping from cache-related HTTP headers to whether they indicate if a page cache is enabled for the site. null indicates caching in the presence of the header; a callback is provided the header’s value and should return true if it implies that a cache is active.

Source

return (array) apply_filters( 'site_status_page_cache_supported_cache_headers', $cache_headers );

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Used by	Description
WP_Site_Health::get_page_cache_headers()`wp-admin/includes/class-wp-site-health.php`	Returns a mapping from response headers to an optional callback to verify if page cache is enabled or not.

Changelog

Version	Description
6.1.0	Introduced.

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