A solution to PHP's inability to convert strings into JSON

background ： I've been working on applets recently （ For the customer ）, A watermark applet , The watermark is removed through the interface , The principle is simple , But there are too many addresses and domain names to be resolved by the target , After using the domain name universal configuration, there is also an error that is not in the legal domain name , So you can only use your own server to perform a pedal , Therefore, after data callback, you need to clean the data and give it to the applet , There is a problem here ：

$result=send_post('https://****.cn/video.php', $post_data);
// $info = json_decode(trim($result),true);
$info=json_encode($result);
echo gettype($info);

adopt json_decode、json_encode It can't be converted into json, The same is string type

terms of settlement ：

Go empty trim()

Solve the code ：

$result=send_post('https://*****/video.php', $post_data);
$info = json_decode(trim($result),true);
echo gettype($info);