wp-includes/class-wpdb.php:3948Wraps errors in a nice header and footer and dies.
$messagestring$error_codestringoptional'500'void|false public function bail( $message, $error_code = '500' ) { if ( $this->show_errors ) { $error = ''; if ( $this->dbh instanceof mysqli ) { $error = mysqli_error( $this->dbh ); } elseif ( mysqli_connect_errno() ) { $error = mysqli_connect_error(); } if ( $error ) { $message = '<p><code>' . $error . "</code></p>\n" . $message; } wp_die( $message ); } else { if ( class_exists( 'WP_Error', false ) ) { $this->error = new WP_Error( $error_code, $message ); } else { $this->error = $message; } return false; } }Introduced in 1.5.0. One change between 6.7.7 and 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
void|false to false.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.