how to fix my problem of data which is not displayed? - php

Question

I created a wordpress plugin to retrieve the information of a token on pancakeswap. I don't understand why it doesn't show me the data. if someone can look at my code and tell me what's wrong that will be super nice. thank you in advance.
<?php
/*
Plugin name: WP PancakeSwap
Description: Ce plugin nous permet de dialoguer avec l' api PancakeSwap
Author: Jean Philippe Faucon
Version : 1.0
*/
/* Copyright 2021 Jean Philippe Faucon (email : jpfaucon81#hotmail.com)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2, as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
// Utilisation de l'API Pancakeswap.
// https://github.com/pancakeswap/pancake-info-api/blob/develop/v2-documentation.md
// Source : https://api.pancakeswap.info/api/v2/tokens/0xdb72feadd4a0734d62fa5a078551986519dca19d
// 1 étape : récupérer les infos auprès de PancakeSwap
function _get_wp_pancakeswap_datas () {
$args = array (
'timeout' => 120,
'httpversion' => '1.1'
);
$url = "https://api.pancakeswap.info/api/v2/tokens/0xdb72feadd4a0734d62fa5a078551986519dca19d";
$call = wp_remote_get($url, $args);
$response = wp_remote_retrieve_body($call);
return $response;
}
// 2 étape : mettre en forme les données
add_shortcode('pancakeswap','output_pancakeswap');
function output_pancakeswap() {
$datas = _get_wp_pancakeswap_datas () ;
//Nom et prix du token
$output = 'Nom du token : '.$datas->name;
$output .= '<br>';
$output .= 'Valeur du token : '.$datas->price;
$output .= ' $';
$output .= '<br>';
$output .= 'Valeur du token en BNB : '.$datas->price_BNB;
return $output;
}

Answer 1

First of all you have to json decode the response.
If this function return the body json decoded as the name suggest wp_remote_retrieve_body($call);
try to "return $response->data" in the function _get_wp_pancakeswap_datas ()
{"updated_at":1636744974029,"data":{"name":"Alfcoin","symbol":"ALF","price":"0.1937757238779150782534763119032","price_BNB":"0.000314980409577114948657924847012"}}
If not you have to do something like this in the function _get_wp_pancakeswap_datas()
$response = json_decode(wp_remote_retrieve_body($call));
return $response->data;

Answer 2

This is essentially right out of the Wordpress manual.
You need to convert the json response to a php object.
You need to access the embedded object from the json response
Alternatively, you could opt for the json_decode() 2nd parameter that returns a php array instead of a php object.
function _get_wp_pancakeswap_datas () {
$args = array (
'timeout' => 120,
'httpversion' => '1.1'
);
$url = "https://api.pancakeswap.info/api/v2/tokens/0xdb72feadd4a0734d62fa5a078551986519dca19d";
$call = wp_remote_get($url, $args);
$response = json_decode(wp_remote_retrieve_body($call));
return $response;
}
add_shortcode('pancakeswap','output_pancakeswap');
function output_pancakeswap() {
$response = _get_wp_pancakeswap_datas();
//Nom et prix du token
$datas = $response->data;
$updateAt = $response->updated_at;
$output = 'Nom du token : '.$datas->name;
$output .= '<br>';
$output .= 'Valeur du token : '.$datas->price;
$output .= ' $';
$output .= '<br>';
$output .= 'Valeur du token en BNB : '.$datas->price_BNB;
return $output;
}