PHP5.3 compatibility

Author: typpo

QuickChart.php

@@ -93,8 +93,15 @@ function getShortUrl() {
     curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type:application/json'));
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
     $result = curl_exec($ch);
+
+    if ($result === false) {
+      throw new Exception(curl_error($ch), curl_errno($ch));
+    }
+
     curl_close($ch);
-    return json_decode($result, true)['url'];
+    // Note: do not dereference json_decode directly for 5.3 compatibility.
+    $ret = json_decode($result, true);
+    return $ret['url'];
   }
 
   function toBinary() {

README.md

@@ -121,3 +121,6 @@ $chart->toFile('/tmp/myfile.png')
 
 Checkout the `examples` directory to see other usage.
 
+## Note to PHP5 users
+
+This package requires curl and json modules.