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count_many_users_posts( int[] $users, string|string[] $post_type = 'post', bool $public_only = false )

Number of posts written by a list of users.

Parameters

$users

(int[]) (Required) Array of user IDs.

$post_type

(string|string[]) (Optional) Single post type or array of post types to check. Defaults to 'post'.

Default value: 'post'

$public_only

(bool) (Optional) Only return counts for public posts. Defaults to false.

Default value: false

Return

(string[]) Amount of posts each user has written, as strings, keyed by user ID.

Source

File: wp-includes/user.php

function count_many_users_posts( $users, $post_type = 'post', $public_only = false ) {
	global $wpdb;

	$count = array();
	if ( empty( $users ) || ! is_array( $users ) ) {
		return $count;
	}

	$userlist = implode( ',', array_map( 'absint', $users ) );
	$where    = get_posts_by_author_sql( $post_type, true, null, $public_only );

	$result = $wpdb->get_results( "SELECT post_author, COUNT(*) FROM $wpdb->posts $where AND post_author IN ($userlist) GROUP BY post_author", ARRAY_N );
	foreach ( $result as $row ) {
		$count[ $row[0] ] = $row[1];
	}

	foreach ( $users as $id ) {
		if ( ! isset( $count[ $id ] ) ) {
			$count[ $id ] = 0;
		}
	}

	return $count;
}

Changelog

Version Description
3.0.0 Introduced.

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