Fallback to empty string if HTTP user agent does not exist in the context of the API call #46
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…text of the API call $_SERVER['HTTP_USER_AGENT'] does not always exist (e.g if API is called from a command line / curl script). Some PHP8+ versions will throw an exception when accessing an array with a non-existing key. The array key should be explicitly checked and null values should fall back to an empty string.
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$_SERVER['HTTP_USER_AGENT'] does not always exist (e.g if API is called from a command line / curl script). Some PHP8+ versions will throw an exception when accessing an array with a non-existing key. The array key should be explicitly checked and null values should fall back to an empty string.