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

        try {
            $this->getBlobInstance($containerName, $blobName, $snapshotId);
        } catch (BlobException $e) {
            return false;
        }

        return true;
    }
public function blobExists($containerName = '', $blobName = '', $snapshotId = null)
    {
        Assertion::notEmpty($containerName, 'Container name is not specified');
        self::assertValidContainerName($containerName);
        Assertion::notEmpty($blobName, 'Blob name is not specified.');

        try {
            $this->getBlobInstance($containerName, $blobName, $snapshotId);
        } catch (BlobException $e) {
            return false;
        }

        return true;
    }
Check if a blob exists

@param string $containerName Container name
@param string $blobName      Blob name
@param string $snapshotId    Snapshot identifier
@return boolean