🐛 Do not try to set header if already set

Stuart297 · Mar 25, 2019 · ac005fd · ac005fd
1 parent ae59265
commit ac005fd
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/app/controller/class-ms-controller-plugin.php b/app/controller/class-ms-controller-plugin.php
@@ -96,7 +96,11 @@ public function __construct() {
 				break;
 			}
 		}
-		if ( ! $p3p_done ) { header( 'P3P:CP="NOI"' ); }
+
+		// We can not set header, when it's already sent.
+		if ( ! $p3p_done && ! headers_sent() ) {
+			header( 'P3P:CP="NOI"' );
+		}
 
 		/*
 		 * Remove the "&msg" attribute from the URL if it was already present in