chip.diff

diff --git a/lib/chippino/apps/chippino/template/chip/node/header.php b/lib/chippino/apps/chippino/template/chip/node/header.php
index d51b5ae..aeff84a 100644
--- a/lib/chippino/apps/chippino/template/chip/node/header.php
+++ b/lib/chippino/apps/chippino/template/chip/node/header.php
@@ -9,7 +9,9 @@ class ChipHeader_PXHTMLNode extends PXHTMLNode {
         $replace = (strtolower($node->getAttribute('replace')) == "false") ? FALSE : TRUE;
         while ($node->firstChild) {
             if ($node->firstChild->nodeType == XML_TEXT_NODE) {
-                header(trim($node->firstChild->wholeText)."\n\n", $replace);
+                $str = 'header(trim("'.$node->firstChild->wholeText.'")."\n\n", '.$replace.');';
+                $php_inst_st = $this->createProcessingInstruction($str);        
+                $node->parentNode->insertBefore($php_inst_st, $node);
             }
             $node->removeChild($node->firstChild);
         }
diff --git a/lib/chippino/apps/chippino/template/init.php b/lib/chippino/apps/chippino/template/init.php
index e79ee65..fa797d3 100644
--- a/lib/chippino/apps/chippino/template/init.php
+++ b/lib/chippino/apps/chippino/template/init.php
@@ -29,6 +29,8 @@ $_chip_pxhtml_cache_file = chip($cache.'/'.$chk)->getFilePath().'.php';
 
 define('PXHTML_SIGNATURE_HASH', $chk);
 
+header('X-Chippino-File-Checksum: '.PXHTML_SIGNATURE_HASH."\n\n");
+
 // begin output buffering
 // check for zlib.output_compression
 // open proper output bufer
@@ -40,7 +42,8 @@ else {
 }
 
 if (file_exists($_chip_pxhtml_cache_file)) {
-    return include $_chip_pxhtml_cache_file;
+    include $_chip_pxhtml_cache_file;
+    return '';
 }
 
 $content = PXHTML::parse($file, null);
@@ -55,3 +58,4 @@ unset($chk);
 include $_chip_pxhtml_cache_file;
 // $output = trim(ob_get_contents());
 ob_end_flush();
+return '';