What's the request tool does the WHMCS develop use?

[malin]

I saw WHMCS documentation use the curl：

https://developers.whmcs.com/api/sample-code/

But I want to know does this have error handler? where to except the Exception?

[Kian]

Using WHMCS API from a PHP script via curl() is the same as using localAPI(). In both cases response parameters are always the same including errors.

For example DomainRenew API command always returns error or success in the result parameter. It doesn't matter if you're using curl() or localAPI(). The same logic applies to all API commands.