Help downloading a non-image file using the API

Thanks! That's helpful. So, the "Invalid URL" error isn't coming from the API itself, but rather just from this line of code:

if ($response === false) { $response = "Invalid URL: ".$url;/*echo "Problem reading data from $url.";*/ }

That will occur if `$response` is false, and `$response` will be false based on `@stream_get_contents($fp)`. The `$fp` comes from `fopen`, which will return false if an error occurs.

So, if something went wrong with the API call itself, `fopen` would return false, which wouldn't be a valid `resource` as `stream_get_contents` expects,  so `stream_get_contents` would then return false, and trigger your `$response === false` line.

According to the fopen documentation: "If the open fails, an error of level E_WARNING is generated.". I can't offer much general PHP advice, but it looks like there is some information in this StackOverflow post about getting the error information, if that's where the issue is occuring.

It looks like you already have some other `echo` statements in the case where things failed though. Are you getting any output from those?

Alternatively, you can use curl in PHP instead, like shown in this example.