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

Retrieves one variable 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

$query

(Optional) SQL query. Defaults to null, use the result from the previous query.

Default value: null

$x

(Optional) Column of value to return. Indexed from 0. Default 0.

$y

(Optional) Row of value to return. Indexed from 0. Default 0.

Return

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

Source

File: wp-includes/class-wpdb.php

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

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

		if ( $query ) {
			$this->query( $query );
		}

		// Extract var out of cached results based 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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Changelog

Changelog
Version	Description
0.71	Introduced.