Sending a php array as a dialogflow response - php

Question

Hey I am building a chatbot using dialogflow and I am generating the responses by using a customized Webhook (I am programming in php). I am extracting data from my database and storing it in an array but when I send the array as a response to dialogflow it only shows the first row.
Here is my code:
<?php
header('Content-Type: text/html; charset=utf-8');
date_default_timezone_set("Asia/Bangkok");
$date = date("Y-m-d");
$time = date("H:i:s");
$json = file_get_contents('php://input');
$request = json_decode($json, true);
$input = fopen("log_json.txt", "w") or die("Unable to open file!");
fwrite($input,$json);
fclose($input);
function processMessage($update) {
if($update["queryResult"]["action"] == "ques"){
$bdd= new PDO('mysql:host=localhost;dbname=****', '****', '***', array(
PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8")) ;
$data = array();
$nom= $update["queryResult"]["parameters"]["nom_aliment"];
$info=$update["queryResult"]["parameters"]["Information"];
$quantite=$update["queryResult"]["parameters"]["Quantite"];
$req=$bdd->prepare("SELECT * FROM TableCiqual WHERE alim_nom LIKE ? ");
$req->execute(array("%$nom%"));
while($resultat=$req->fetch()){
$variab=$resultat[$info]*$quantite/100;
$ppp =$resultat['alim_nom'].' '.$info.' : '.$variab;
$data=$ppp;
}
sendMessage(array(
"source" => $update["responseId"],
"fulfillmentText"=>$data,
"payload" => array(
"items"=>[
array(
"simpleResponse"=>
array(
"textToSpeech"=>"Bad request"
)
)
],
),
));
}
}
function sendMessage($parameters) {
echo json_encode($parameters);
}
I know that my query returns multiple results all these results are stored in the array $data that I send as a response in dialogflow. The problem is that dialogflow only shows me the first row of the array $data instead of the whole array with all the rows.
My question is : Is it possible to send an array as a response in dialogflow and if yes how so.

Answer 1

I think there are two issues here.
The first is that $data is not actually containing a list of your results. The line
$data = $ppp;
is assigning $ppp, which is a string, to $data rather than adding on to the end of the array. I think, for that line, you want something more like
$data[] = $ppp;
However, this doesn't solve your problem completely, since the fulfillmentText attribute in JSON isn't expecting an array - it is expecting a string. So you probably want to concatenate all of those entries with something like
"filfillmentText" => implode( "\n", $data );
However, this assumes that you both want a new line in between each answer and that the chat system you're using supports the feature this way - not all do. (And you haven't indicated which one you're using.)