json - Why is PHP Curl returning T_CONSTANT_ENCAPSED_STRING?

I'm attempting to use PHP to get data from CallRail.com API via JSON.

However, I'm getting this error when previewing my PHP file directly in my browser: T_CONSTANT_ENCAPSED_STRING

My code:

curl -H "Authorization: Token token={my-token-id}" \
-X GET \
"https://api.callrail.com/v2/a/{my-account-id}/calls.json"
?>

So far I have:

• Read several articles related to the error without finding a solution or verifiably accurate explanation.


• I've manually retyped all of the code to ensure I didn't have any improperly encoded characters or invalid white spaces.


• I've also attempted to locate official documentation in the PHP docs but not found anything helpful.


• And I've tested this in a blank PHP file so the code is completely isolated.

I don't know how to further debug this issue and am hoping someone can either identify the problem or share the steps to debug this on my own from this point.