Answer Posted / Sandeep Kaumr
$_SERVER is a predefined PHP array containing information about the environment in which the script is running, such as HTTP headers, server software, and system settings.n$_ENV, on the other hand, is not a built-in variable in PHP. It can be used to access environment variables, but it's important to note that PHP doesn't have a native way of accessing environment variables like some other languages (e.g., Bash). In most cases, you would use $_SERVER['HTTP_USER_AGENT'] or $_SERVER['REQUEST_METHOD'] for accessing server information.nTo access environment variables, it's recommended to use the getenv() function in PHP.
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