Send Picture with Caption - Update Client.php

[manufuentescr]

Send Picture with Caption

[fealXX]

One should probably check if a caption was specified!

I'd suggest to use
public function sendPicture($peer, $path, $caption = false)
and
return $this->exec('send_photo ' . $peer . ' ' . $formattedPath .(($caption !== false)?' ' . $caption:''));