wp-includes/class-wpdb.php:3138Retrieves an entire SQL result set from the database (i.e., many rows).
$querystringoptionalnull$outputstringoptionalOBJECTarray|object|null public function get_results( $query = null, $output = OBJECT ) { $this->func_call = "\$db->get_results(\"$query\", $output)"; if ( $query ) { if ( $this->check_current_query && $this->check_safe_collation( $query ) ) { $this->check_current_query = false; } $this->query( $query ); } else { return null; } $new_array = array(); if ( OBJECT === $output ) { // Return an integer-keyed array of row objects. return $this->last_result; } elseif ( OBJECT_K === $output ) { /* * Return an array of row objects with keys from column 1. * (Duplicates are discarded.) */ if ( $this->last_result ) { foreach ( $this->last_result as $row ) { $var_by_ref = get_object_vars( $row ); $key = array_shift( $var_by_ref ); if ( ! isset( $new_array[ $key ] ) ) { $new_array[ $key ] = $row; } } } return $new_array; } elseif ( ARRAY_A === $output || ARRAY_N === $output ) { // Return an integer-keyed array of... if ( $this->last_result ) { if ( ARRAY_N === $output ) { foreach ( (array) $this->last_result as $row ) { // ...integer-keyed row arrays. $new_array[] = array_values( get_object_vars( $row ) ); } } else { foreach ( (array) $this->last_result as $row ) { // ...column name-keyed row arrays. $new_array[] = get_object_vars( $row ); } } } return $new_array; } elseif ( strtoupper( $output ) === OBJECT ) { // Back compat for OBJECT being previously case-insensitive. return $this->last_result; } return null; }Introduced in 0.71. 2 changes between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
$query retyped from string to string|null.verified against sourcearray|object|null to array|null.verified against sourcesrc/wp-includes/class-wpdb.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.