telegram bot split keyboard rows[columns] - php

Question

I am writing my telegram bot codes in PHP. I would like to split my inline keyboard into 2 or 3 columns. Here is my code:
foreach ($categories as $cat) {
$key[] = array(
array('text'=>$cat['name'],'callback_data'=>'sub-'.$cat['id'])
);
if ($k % 2 == 0) {
$keyoptions[] = $key;
$key = array();
}
$k++;
}
$telegram->SendMessage($userid, $keyoptions);
but my code doesn't work. Where is the problem and how can I solve my issue?
EDIT :
i just used this code
$keyoptions = array_chunk($keyoptions,3);
but still can't find the problem;

Answer 1

Telegram API: inline_keyboard: Array of Array of InlineKeyboardButton
Example:
keyboard: [
["uno :+1:"],["uno \ud83d\udc4d", "due"],["uno", "due","tre"]
]

Answer 2

I don't know what library you are using and what are those fields in your code, but this a working with native telegram API:
function inlineKeyboard($text, $chatID, $btnNames, $callBackDatas)
{
$inlineRow = array(); // this is array for each row of buttons
$i = 0;
foreach ($btnNames as $name) {
array_push($inlineRow, array("text" => $name, "callback_data" => $callBackDatas[$i]));
$i++;
}
/* if you need multiple rows then just create other inlineRow arrays
and push to this array below */
$inlineKeyboard = array($inlineRow);
$keyboard = array(
"inline_keyboard" => $inlineKeyboard
);
$postfields = array
(
'chat_id' => "$chatID",
'text' => $text,
'reply_markup' => json_encode($keyboard)
);
send('sendMessage', $postfields);
}
define('BaseURL', 'https://api.telegram.org/bot<TOKEN>');
function send($method, $datas)
{
$url = BaseURL . "/" . $method;
if (!$curld = curl_init()) {
exit;
}
curl_setopt($curld, CURLOPT_POST, true);
curl_setopt($curld, CURLOPT_POSTFIELDS, $datas);
curl_setopt($curld, CURLOPT_URL, $url);
curl_setopt($curld, CURLOPT_RETURNTRANSFER, true);
$output = curl_exec($curld);
curl_close($curld);
return $output;
}