# The MongoDB\Driver\Exception\ConnectionException class

(mongodb >= 1.0.0)

## Introduction

Base class for exceptions thrown when the driver fails to establish a database connection.

## Class synopsis

class MongoDB\Driver\Exception\ConnectionException extends MongoDB\Driver\Exception\RuntimeException implements MongoDB\Driver\Exception\Exception {
/* Inherited properties */
protected ?array $errorLabels;
protected string $message = "";
private string $string = "";
protected int $code;
protected string $file = "";
protected int $line;
private array $trace = [];
private ?Throwable $previous = null;
/* Inherited methods */
final public function MongoDB\Driver\Exception\RuntimeException::hasErrorLabel(string `$errorLabel`): bool
final public function Exception::getMessage(): string
final public function Exception::getPrevious(): ?Throwable
final public function Exception::getCode(): int
final public function Exception::getFile(): string
final public function Exception::getLine(): int
final public function Exception::getTrace(): array
final public function Exception::getTraceAsString(): string
public function Exception::__toString(): string
private function Exception::__clone(): void
}
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