试图获取非对象错误 PHP curl 的属性

Question

Im trying to use an api to get a fruit information.

$fruitStirng = 'apple';

$url = "https://www.fruityvice.com/api/fruit/".$fruitStirng;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$res = curl_exec($ch);
    
$main = json_decode($res);

Result should be something like this:

{ "genus": "Malus", "name": "Apple", "id": 6, "family": "Rosaceae", "order": "Rosales", "nutritions": { "carbohydrates": 11.4, "protein": 0.3, "fat": 0.4, "calories": 52, "sugar": 10.3 } }

but for example when im trying echo genus like this:

$genus = $main->genus;
echo $genus

I get Trying to get property 'genus' of non-object error !

I also used foreach but got an error too

Invalid argument supplied for foreach()

Answer 1

Since API returning the JSON uses HTTPS, you must configure cURL SSL option (CURLOPT_SSL_VERIFYPEER). Here's a working code:

<?php
$fruitString = 'apple';

$url = "https://www.fruityvice.com/api/fruit/".$fruitString;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$res = curl_exec($ch);

$main = json_decode($res);

$genus = $main->genus;
echo $genus; // Malus