wp-includes/class-wpdb.php:1914Enables or disables suppressing of database errors.
$suppressbooloptionaltruebool public function suppress_errors( $suppress = true ) { $errors = $this->suppress_errors; $this->suppress_errors = (bool) $suppress; return $errors; }Introduced in 2.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wpdb.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.