get_lastpostmodified( string $timezone = 'server', string $post_type = 'any' ): string

Description

Compatibility

Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.

Parameters

$timezonestringoptional

The timezone for the timestamp. See get_lastpostdate() for information on accepted values.
Default 'server'.Default: 'server'

$post_typestringoptional

The post type to check. Default 'any'.Default: 'any'

Return value

string

The timestamp in 'Y-m-d H:i:s' format, or false on failure.

Performance profile

How much work a call to get_lastpostmodified() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.

Cost class

Light

Only touches the object cache, via wp_cache_get().

Scaling

Constant

No loop in the body: the same number of instructions runs whatever you pass in.

Instructions

12–32

Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 33.

Plugin surface

2 hooks

Third-party callbacks on 'pre_get_lastpostmodified', 'get_lastpostmodified' run inside this call, and their cost is not bounded by anything here.

Called by

2

2 places in core call this, so the cost is paid more often than your own code shows.

What it touches

• hookthird-party callbacksapply_filters()called directly
• cacheobject cachewp_cache_get()one call below get_lastpostmodified()

What one call costs · 2 distinct outcomes

One number would be a lie: the work depends on which branch runs. These are every distinct cost get_lastpostmodified() can have, taken from its control-flow graph on PHP 8.5.

Hooks and filters fired · 2

2 hooks fire while get_lastpostmodified() runs, in this order:

1. 1
   apply_filters( pre_get_lastpostmodified )filterline 7811 (+13 into the body)

   Pre-filter the return value of get_lastpostmodified() before the query is run.

2. 2
   apply_filters( get_lastpostmodified )filterline 7836 (+38 into the body)

   Filters the most recent time that a post on the site was modified.

Uses · 3

• apply_filters()Calls the callback functions that have been added to a filter hook.
• _get_last_post_time()Gets the timestamp of the last time any post was modified or published.
• get_lastpostdate()Retrieves the most recent time that a post on the site was published.

Used by · 2

• WP::send_headers()Sends additional HTTP headers for caching, content type, etc.
• get_feed_build_date()Gets the UTC time of the most recently modified post from WP_Query.

Source code

View on Trac ↗View on GitHub ↗

7798function get_lastpostmodified( $timezone = 'server', $post_type = 'any' ) {7799	/**7800	 * Pre-filter the return value of get_lastpostmodified() before the query is run.7801	 *7802	 * @since 4.4.07803	 *7804	 * @param string|false $lastpostmodified The most recent time that a post was modified,7805	 *                                       in 'Y-m-d H:i:s' format, or false. Returning anything7806	 *                                       other than false will short-circuit the function.7807	 * @param string       $timezone         Location to use for getting the post modified date.7808	 *                                       See get_lastpostdate() for accepted `$timezone` values.7809	 * @param string       $post_type        The post type to check.7810	 */7811	$lastpostmodified = apply_filters( 'pre_get_lastpostmodified', false, $timezone, $post_type );7812 7813	if ( false !== $lastpostmodified ) {7814		return $lastpostmodified;7815	}7816 7817	$lastpostmodified = _get_last_post_time( $timezone, 'modified', $post_type );7818	$lastpostdate     = get_lastpostdate( $timezone, $post_type );7819 7820	if ( $lastpostdate > $lastpostmodified ) {7821		$lastpostmodified = $lastpostdate;7822	}7823 7824	/**7825	 * Filters the most recent time that a post on the site was modified.7826	 *7827	 * @since 2.3.07828	 * @since 5.5.0 Added the `$post_type` parameter.7829	 *7830	 * @param string|false $lastpostmodified The most recent time that a post was modified,7831	 *                                       in 'Y-m-d H:i:s' format. False on failure.7832	 * @param string       $timezone         Location to use for getting the post modified date.7833	 *                                       See get_lastpostdate() for accepted `$timezone` values.7834	 * @param string       $post_type        The post type to check.7835	 */7836	return apply_filters( 'get_lastpostmodified', $lastpostmodified, $timezone, $post_type );7837}

Changelog

Introduced in 1.2.0. Unchanged from 6.7.7 through 7.1.0.

1. 6.7.7
2. 6.8.8
3. 6.9.7
4. 7.0.4
5. 7.1.0

Signature, return type and hooks compared across 5 parsed releases.

About this page

Parsed data

Generated from the wordpress-develop 7.1.0 tag, from src/wp-includes/post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.

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