From 9c1afbca92af650a216ea39de1fe75278eeae418 Mon Sep 17 00:00:00 2001
From: Pim van den Berg
Date: Fri, 25 Jul 2014 22:05:44 +0200
Subject: support php versions without json support and show a warning message

---
 graph.php        |  2 +-
 inc/html.inc.php | 13 +++++++++++++
 layout/style.css |  8 +++++++-
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/graph.php b/graph.php
index 2c3f6e6..6206d73 100644
--- a/graph.php
+++ b/graph.php
@@ -35,7 +35,7 @@ if ($plugin == 'aggregation') {
 }
 
 # plugin json
-if (file_exists('plugin/'.$plugin.'.json')) {
+if (function_exists('json_decode') && file_exists('plugin/'.$plugin.'.json')) {
 	$json = file_get_contents('plugin/'.$plugin.'.json');
 	$plugin_json = json_decode($json, true);
 
diff --git a/inc/html.inc.php b/inc/html.inc.php
index 9107269..c8cfbaf 100644
--- a/inc/html.inc.php
+++ b/inc/html.inc.php
@@ -54,6 +54,19 @@ echo <<<EOT
   <h1><a href="{$html_weburl}">Collectd Graph Panel</a></h1>
 </div>
 
+EOT;
+
+	if(!function_exists('json_decode')) {
+		echo <<<EOT
+<div id="warnheader">
+	Your php version doesn't support <a href="http://php.net/json">JSON</a>. Your graphs would have looked more beautiful if it did.
+</div>
+
+EOT;
+
+	}
+
+echo <<<EOT
 <div id="content">
 
 EOT;
diff --git a/layout/style.css b/layout/style.css
index 3d5c94b..e344cf7 100644
--- a/layout/style.css
+++ b/layout/style.css
@@ -15,6 +15,12 @@ body {
 	text-decoration: none;
 }
 
+#warnheader {
+	background: #ffe583;
+	padding: 8px 8px 8px 18px;
+	border-bottom: 1px solid #d5ad14;
+}
+
 #content {
 	padding-left: 20px;
 }
@@ -25,7 +31,7 @@ body {
 }
 
 h1 {
-	margin-top: 0;
+	margin: 0;
 	font-size: 1em;
 }
 
-- 
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