Sending message in telegram bot with images

You can use /sendphoto and set the captionwhich appears under an image.
https://core.telegram.org/bots/api#sendphoto

No, You CAN send a text that contains photo in one single message. Telegram allows you do this but that the way is kinda tricky.

1. Using https://core.telegram.org/bots/api#sendmessage method, set option disable_web_page_preview => false
2. In your text data put an image link with invisible character(s) inside your message text.

Example:

$message = <<<TEXT*** your content ****** somewhere below (or above) a link to your image with invisible character(s) ***<a href="https://www.carspecs.us/photos/c8447c97e355f462368178b3518367824a757327-2000.jpg"> ‏ </a>TEXT;$ch = curl_init();curl_setopt($ch, CURLOPT_POST, true);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: multipart/form-data']);curl_setopt($ch, CURLOPT_URL, 'https://api.telegram.org/bot<token>/sendMessage');$postFields = array(    'chat_id' => '@username',    'text' => $message,    'parse_mode' => 'HTML',    'disable_web_page_preview' => false,);curl_setopt($ch, CURLOPT_POSTFIELDS, $postFields);if(!curl_exec($ch))    echo curl_error($ch);curl_close($ch);

You can't send a text message that contains both image and text. However If your text contains URL, Telegram displays a preview of the web page by default.Or you can send two message one after another or send a photo with caption.