Telegram Send image from external server - php

Question

I'm using PHP to config a webhook for a BOT.
I'd like to send picture from another server.
I've tried this way
function bot1($chatID,$sentText) {
$botUrl = 'https://api.telegram.org/bot'.self::_BOT_TOKEN_;
$img = "https://www.server2.com/1.jpeg";
$this->sendPhoto($botUrl,$chatID,$img);
}
function sendPhoto($botUrl,$chatID, $img){
$this->sendMessage($botUrl,$chatID,'This is the pic'.$chatID);
$this->sendPost($botUrl,"sendPhoto",$chatID,"photo",$img);
}
function sendMessage($botUrl,$chatID, $text){
$inserimento = file_get_contents($botUrl."/sendMessage?chat_id=".$chatID."&text=".$text."&reply_markup=".json_encode(array("hide_keyboard"=>true)));
}
function sendPost($botUrl,$function,$chatID,$type,$doc){
$response = $botUrl. "/".$function;
$post_fields = array('chat_id' => $chatID,
$type => new CURLFile(realpath($doc))
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
"Content-Type:multipart/form-data"
));
curl_setopt($ch, CURLOPT_URL, $response);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
$output = curl_exec($ch);
}
But I receive only the message.
What is the problem?
I've tried to change in http but the problem persists

Answer 1

Well, I've done a workaround because my cUrl version seems to have a bug in uploading file.
Now I use Zend FW
$botUrl = 'https://api.telegram.org/bot'.self::_BOT_TOKEN_;
$realpath = realpath($doc);
$url = $botUrl . "/sendPhoto?chat_id=" . $chatID;
$client = new Zend_Http_Client();
$client->setUri($url);
$client->setFileUpload($realpath, "photo");
$client->setMethod('POST');
$response = $client->request();

Answer 2

You have to send a file, not a URL.
So:
function bot1( $chatID,$sentText )
{
$botUrl = 'https://api.telegram.org/bot'.self::_BOT_TOKEN_;
$img = "https://www.server2.com/1.jpeg";
$data = file_get_contents( $img ); # <---
$filePath = "/Your/Local/FilePath/Here"; # <---
file_put_contents( $data, $filePath ); # <---
$this->sendPhoto( $botUrl, $chatID, $filePath ); # <---
}
This is as raw example, without checking success of file_get_contents().
In my bot I use this schema, and it works fine.