wpdb::get_var() – Method | Developer.WordPress.org

Retrieves one value from the database.

Description

Executes a SQL query and returns the value from the SQL result.
If the SQL result contains more than one column and/or more than one row, the value in the column and row specified is returned. If $query is null, the value in the specified column and row from the previous SQL result is returned.

Parameters

$querystring|nulloptional: SQL query. Defaults to null, use the result from the previous query.
Default:null
$xintoptional: Column of value to return. Indexed from 0. Default 0.
$yintoptional: Row of value to return. Indexed from 0. Default 0.

Return

string|null Database query result (as string), or null on failure.

Source

public function get_var( $query = null, $x = 0, $y = 0 ) {
	$this->func_call = "\$db->get_var(\"$query\", $x, $y)";

	if ( $query ) {
		if ( $this->check_current_query && $this->check_safe_collation( $query ) ) {
			$this->check_current_query = false;
		}

		$this->query( $query );
	}

	// Extract var out of cached results based on x,y vals.
	if ( ! empty( $this->last_result[ $y ] ) ) {
		$values = array_values( get_object_vars( $this->last_result[ $y ] ) );
	}

	// If there is a value return it, else return null.
	return ( isset( $values[ $x ] ) && '' !== $values[ $x ] ) ? $values[ $x ] : null;
}

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Uses	Description
wpdb::check_safe_collation()`wp-includes/class-wpdb.php`	Checks if the query is accessing a collation considered safe on the current version of MySQL.
wpdb::query()`wp-includes/class-wpdb.php`	Performs a database query, using current database connection.

Used by	Description
wp_update_user_counts()`wp-includes/user.php`	Updates the total count of users on the site.
_wp_batch_update_comment_type()`wp-includes/comment.php`	Updates the comment type for a batch of comments.
WP_Debug_Data::debug_data()`wp-admin/includes/class-wp-debug-data.php`	Static function for generating site debug data when required.
WP_Site_Health::prepare_sql_data()`wp-admin/includes/class-wp-site-health.php`	Runs the SQL version checks.
is_site_meta_supported()`wp-includes/functions.php`	Determines whether site meta is enabled.
_find_post_by_old_slug()`wp-includes/query.php`	Find the post ID for redirecting an old slug.
_find_post_by_old_date()`wp-includes/query.php`	Find the post ID for redirecting an old date.
wp_check_comment_flood()`wp-includes/comment.php`	Checks whether comment flooding is occurring.
WP_Term_Query::get_terms()`wp-includes/class-wp-term-query.php`	Retrieves the query results.
WP_Network_Query::set_found_networks()`wp-includes/class-wp-network-query.php`	Populates found_networks and max_num_pages properties for the current query if the limit clause was used.
WP_Network_Query::get_network_ids()`wp-includes/class-wp-network-query.php`	Used internally to get a list of network IDs matching the query vars.
WP_Comment_Query::set_found_comments()`wp-includes/class-wp-comment-query.php`	Populates found_comments and max_num_pages properties for the current query if the limit clause was used.
WP_Site_Query::get_site_ids()`wp-includes/class-wp-site-query.php`	Used internally to get a list of site IDs matching the query vars.
WP_Site_Query::set_found_sites()`wp-includes/class-wp-site-query.php`	Populates found_sites and max_num_pages properties for the current query if the limit clause was used.
wp_term_is_shared()`wp-includes/taxonomy.php`	Determines whether a term is shared between multiple taxonomies.
WP_Comment_Query::get_comment_ids()`wp-includes/class-wp-comment-query.php`	Used internally to get a list of comment IDs matching the query vars.
network_step2()`wp-admin/includes/network.php`	Prints step 2 for Network installation process.
display_setup_form()`wp-admin/install.php`	Displays installer setup form.
network_domain_check()`wp-admin/includes/network.php`	Check for an existing network.
WP_User_Search::query()`wp-admin/includes/deprecated.php`	Executes the user search query.
populate_network()`wp-admin/includes/schema.php`	Populate network settings.
maybe_disable_link_manager()`wp-admin/includes/upgrade.php`	Disables the Link Manager on upgrade if, at the time of upgrade, no links exist in the DB.
pre_schema_upgrade()`wp-admin/includes/upgrade.php`	Runs before the schema is upgraded.
maybe_create_table()`wp-admin/includes/upgrade.php`	Creates a table in the database, if it doesn’t already exist.
upgrade_network()`wp-admin/includes/upgrade.php`	Executes network-level upgrade routines.
update_gallery_tab()`wp-admin/includes/media.php`	Adds the gallery tab back to the tabs array if post has image attachments.
post_exists()`wp-admin/includes/post.php`	Determines if a post exists based on title, content, date and type.
WP_Posts_List_Table::__construct()`wp-admin/includes/class-wp-posts-list-table.php`	Constructor.
comment_exists()`wp-admin/includes/comment.php`	Determines if a comment exists based on author and date.
wp_notify_moderator()`wp-includes/pluggable.php`	Notifies the moderator of the site about a new comment that is awaiting approval.
get_calendar()`wp-includes/general-template.php`	Displays calendar with days that have posts as links.
WP_Query::set_found_posts()`wp-includes/class-wp-query.php`	Sets up the amount of found posts and the number of pages (if limit clause was used) for the current query.
is_blog_installed()`wp-includes/functions.php`	Determines whether WordPress is already installed.
do_enclose()`wp-includes/functions.php`	Checks content for video and audio links to add as enclosures.
_update_post_term_count()`wp-includes/taxonomy.php`	Updates term count based on object types of the current taxonomy.
_update_generic_term_count()`wp-includes/taxonomy.php`	Updates term count based on number of objects.
wp_unique_term_slug()`wp-includes/taxonomy.php`	Makes term slug unique, if it isn’t already.
wp_update_term()`wp-includes/taxonomy.php`	Updates term based on arguments provided.
wp_insert_term()`wp-includes/taxonomy.php`	Adds a new term to the database.
wp_set_object_terms()`wp-includes/taxonomy.php`	Creates term and taxonomy relationships.
wp_delete_term()`wp-includes/taxonomy.php`	Removes a term from the database.
get_adjacent_post()`wp-includes/link-template.php`	Retrieves the adjacent post.
ms_allowed_http_request_hosts()`wp-includes/http.php`	Adds any domain in a multisite installation for safe HTTP requests to the allowed list.
update_option()`wp-includes/option.php`	Updates the value of an option that was already added.
WP_User_Query::query()`wp-includes/class-wp-user-query.php`	Executes the query, with the current variables.
wp_insert_user()`wp-includes/user.php`	Inserts a user into the database.
count_user_posts()`wp-includes/user.php`	Gets the number of posts a user has written.
_get_last_post_time()`wp-includes/post.php`	Gets the timestamp of the last time any post was modified or published.
get_page_by_title()`wp-includes/deprecated.php`	Retrieves a page given its title.
wp_unique_post_slug()`wp-includes/post.php`	Computes a unique slug for the post, when given the desired slug and some post details.
wp_insert_post()`wp-includes/post.php`	Inserts or update a post.
wp_count_attachments()`wp-includes/post.php`	Counts number of attachments for the mime type(s).
redirect_guess_404_permalink()`wp-includes/canonical.php`	Attempts to guess the correct URL for a 404 request based on query vars.
redirect_canonical()`wp-includes/canonical.php`	Redirects incoming links to the proper URL based on the site url.
update_posts_count()`wp-includes/ms-functions.php`	Updates a blog’s post count.
wpmu_validate_blog_signup()`wp-includes/ms-functions.php`	Processes new site registrations.
ms_not_installed()`wp-includes/ms-load.php`	Displays a failure message.
get_blog_list()`wp-includes/ms-deprecated.php`	Deprecated functionality to retrieve a list of all sites.
get_blog_status()`wp-includes/ms-blogs.php`	Gets a blog details field.
wp_xmlrpc_server::pingback_ping()`wp-includes/class-wp-xmlrpc-server.php`	Retrieves a pingback and registers it.
wpdb::get_col()`wp-includes/class-wpdb.php`	Retrieves one column from the database.
wp_update_comment_count_now()`wp-includes/comment.php`	Updates the comment count for the post.
get_lastcommentmodified()`wp-includes/comment.php`	Retrieves the date the last comment was modified.
wp_allow_comment()`wp-includes/comment.php`	Validates whether this comment is allowed to be made.
check_comment()`wp-includes/comment.php`	Checks whether a comment passes internal checks to be allowed to add.
add_metadata()`wp-includes/meta.php`	Adds metadata for the specified object.

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Changelog

Version	Description
0.71	Introduced.

User Contributed Notes

Skip to note 3 content

WPBody 8 years ago

You must log in to vote on the helpfulness of this noteVote results for this note: 5You must log in to vote on the helpfulness of this note
// Retrieve and display the number of users.
```
$user_count = $wpdb->get_var( "SELECT COUNT(*) FROM $wpdb->users" );
echo "<p>User count is {$user_count}</p>";
```
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Skip to note 4 content

Jam Viet 7 years ago

You must log in to vote on the helpfulness of this noteVote results for this note: 3You must log in to vote on the helpfulness of this note
get total post from an user:
```
$sum = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) from $wpdb->posts where post_status = 'publish' and user_id = %d", $user_id ) );

printf('This user has %d posts', $sum);
```
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wpdb::get_var( string|null $query = null, int $x, int $y ): string|null

In this article

Description

Parameters

Return

Source

Changelog

User Contributed Notes

wpdb::get_var( string|null $query = null, int $x, int $y ): string|null

In this article

Description

Parameters

Return

Source

Related

Changelog

User Contributed Notes