lib/Beberlei/AzureBlobStorage/BlobClient.php
public function containerExists($containerName = '')
    {
        Assertion::notEmpty($containerName, 'Container name is not specified');
        self::assertValidContainerName($containerName);

        // List containers
        $containers = $this->listContainers($containerName, 1);
        foreach ($containers as $container) {
            if ($container->Name == $containerName) {
                return true;
            }
        }

        return false;
    }
public function containerExists($containerName = '')
    {
        Assertion::notEmpty($containerName, 'Container name is not specified');
        self::assertValidContainerName($containerName);

        // List containers
        $containers = $this->listContainers($containerName, 1);
        foreach ($containers as $container) {
            if ($container->Name == $containerName) {
                return true;
            }
        }

        return false;
    }
Check if a container exists

@param string $containerName Container name
@return boolean