Question

get_lastcommentmodified( string $timezone = 'server' )

The date the last comment was modified.

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description

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参数

$timezone

(string) (Optional) Which timezone to use in reference to 'gmt', 'blog', or 'server' locations.

Default value: 'server'

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返回值

(string|false) Last comment modified date on success, false on failure.

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源代码

File: wp-includes/comment.php

function get_lastcommentmodified( $timezone = 'server' ) {
	global $wpdb;

	$timezone = strtolower( $timezone );
	$key = "lastcommentmodified:$timezone";

	$comment_modified_date = wp_cache_get( $key, 'timeinfo' );
	if ( false !== $comment_modified_date ) {
		return $comment_modified_date;
	}

	switch ( $timezone ) {
		case 'gmt':
			$comment_modified_date = $wpdb->get_var( "SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1" );
			break;
		case 'blog':
			$comment_modified_date = $wpdb->get_var( "SELECT comment_date FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1" );
			break;
		case 'server':
			$add_seconds_server = date( 'Z' );

			$comment_modified_date = $wpdb->get_var( $wpdb->prepare( "SELECT DATE_ADD(comment_date_gmt, INTERVAL %s SECOND) FROM $wpdb->comments WHERE comment_approved = '1' ORDER BY comment_date_gmt DESC LIMIT 1", $add_seconds_server ) );
			break;
	}

	if ( $comment_modified_date ) {
		wp_cache_set( $key, $comment_modified_date, 'timeinfo' );

		return $comment_modified_date;
	}

	return false;
}

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更新日志

Version	description
4.7.0	Replaced caching the modified date in a local static variable with the Object Cache API.
1.5.0	Introduced.

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相关函数

Uses

• wp-includes/cache.php: wp_cache_get()
• wp-includes/cache.php: wp_cache_set()
• wp-includes/wp-db.php: wpdb::get_var()
• wp-includes/wp-db.php: wpdb::prepare()

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Used By

• wp-includes/class-wp.php: WP::send_headers()

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User Contributed Notes