Send response headers manually

Author: bencroker

sdk/php/README.md

@@ -30,11 +30,13 @@ use starfederation\datastar\enums\EventType;
 use starfederation\datastar\enums\FragmentMergeMode;
 use starfederation\datastar\ServerSentEventGenerator;
 
-// If your framework has its own way of sending response headers, you must manually send the headers returned by `ServerSentEventGenerator::headers()` before creating a new instance of `ServerSentEventGenerator`.
-
 // Creates a new `ServerSentEventGenerator` instance.
 $sse = new ServerSentEventGenerator();
 
+// Sends the response headers. 
+// If your framework has its own way of sending response headers, manually send the headers returned by `ServerSentEventGenerator::headers()` instead.
+$sse->sendHeaders();
+
 // Merges HTML fragments into the DOM.
 $sse->mergeFragments('<div></div>', [
     'selector' => '#my-div',

sdk/php/src/ServerSentEventGenerator.php

@@ -54,12 +54,19 @@ public function __construct()
     {
         // Abort the process if the client closes the connection.
         ignore_user_abort(false);
+    }
+
+    /**
+     * Sends the response headers, if not already sent.
+     */
+    public function sendHeaders(): void
+    {
+        if (headers_sent()) {
+            return;
+        }
 
-        // Sets the response headers only if not already sent and not yet set.
-        if (!headers_sent()) {
-            foreach (static::headers() as $name => $value) {
-                header("$name: $value", false);
-            }
+        foreach (static::headers() as $name => $value) {
+            header("$name: $value");
         }
     }