1 files changed, 23 insertions, 0 deletions
diff --git a/src/web/core/controller.php b/src/web/core/controller.php
index ac1e458..ca892e2 100644
--- a/src/web/core/controller.php
+++ b/src/web/core/controller.php
@@ -39,4 +39,27 @@ abstract class Controller extends Component {
 		die();
 	}
 
+	/**
+	 * Returns HTTP POST information if POST request.
+	 * Returns 405 Method Not Allowed if not.
+	 *
+	 * If $key is specified, returns only that key. otherwise
+	 * returns HTTP 400 Bad Request;
+	 */
+	protected function post_data(?string $key = NULL): array|string
+	{
+		// only post requests allowed
+		if ($_SERVER['REQUEST_METHOD'] != 'POST')
+			$this->error(405);
+
+		// return entire $_POST array
+		if (!$key)
+			return $_POST;
+
+		if (!isset($_POST[$key]))
+			$this->error(400);
+
+		return $_POST[$key];
+	}
+
 }