PHP - Check if localhost

is_localhost

// Check if we are in a local environment
	
	function is_localhost() {
		
		// set the array for testing the local environment
		$whitelist = array( '127.0.0.1', '::1' );
		
		// check if the server is in the array
		if ( in_array( $_SERVER['REMOTE_ADDR'], $whitelist ) ) {
			
			// this is a local environment
			return true;
			
		}
		
	}
	
// end